Determination of total nitrogen content by spectrophotometry

Determination of total nitrogen content by spectrophotometry, Total:273 items.

In the international standard classification, Determination of total nitrogen content by spectrophotometry involves: Ferrous metals, Construction materials, Tea. Coffee. Cocoa, Sugar. Sugar products. Starch, Animal feeding stuffs, Milk and milk products, Inorganic chemicals, Non-metalliferous minerals, Pharmaceutics, Vocabularies, Fertilizers, Metalliferous minerals, Ferroalloys, Water quality, Analytical chemistry, Meat, meat products and other animal produce, General methods of tests and analysis for food products, Farming and forestry, Organic chemicals, Leather technology, Conducting materials, Cereals, pulses and derived products, Pesticides and other agrochemicals, Food products in general, Raw materials for rubber and plastics, Non-ferrous metals, Spices and condiments. Food additives, Coals, Natural gas, Products of the chemical industry, Iron and steel products, Nuclear energy engineering.

European Committee for Standardization (CEN), Determination of total nitrogen content by spectrophotometry

EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
EN 10179:1989 Chemical Analysis of Ferrous Materials - Determination of Nitrogen (Trace Mounts) in Steel Spectrophotometric Method

International Organization for Standardization (ISO), Determination of total nitrogen content by spectrophotometry

ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 6491:1980 Animal feeding stuffs; Determination of total phosphorus content; Spectrophotometric method
ISO 5378:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Spectrophotometric method
ISO 3946:1982 Starches and derived products; Determination of total phosphorus content; Spectrophotometric method
ISO 6607:1985 Aluminium ores; Determination of total silicon content; Combined gravimetric and spectrophotometric method
ISO 2899:1974 Sulphuric acid and oleums for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 1053:1975 Zinc; Determination of copper content; Spectrophotometric method
ISO 19043:2023 Natural rubber latex concentrate — Determination of total phosphate content by spectrophotometric method
ISO 5400:1984 | IULTCS Leather — Determination of total silicon content — Reduced molybdosilicate spectrometric method
ISO/TS 21826:2020 Iron ores — Determination of total iron content — EDTA photometric titration method
ISO 9441:1988 Steel; determination of niobium content; PAR spectrophotometric method
ISO 17058:2004 Steel and iron - Determination of arsenic content - Spectrophotometric method
ISO 19043:2015 Natural rubber latex concentrate - Determination of total phosphate content by spectrophotometric method
ISO 4941:1994 Steel and iron - Determination of molybdenum content - Thiocyanate spectrophotometric method
ISO 3886:1977 Iron ores — Determination of manganese content — Spectrophotometric method
ISO 7834:1987 Iron ores; Determination of arsenic content; Molybdenum blue spectrophotometric method
ISO 10153:1997 Steel - Determination of boron content - Curcumin spectrophotometric method

CEN - European Committee for Standardization, Determination of total nitrogen content by spectrophotometry

EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method

German Institute for Standardization, Determination of total nitrogen content by spectrophotometry

DIN EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
DIN EN 10179:2023-07 Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method; German and English version prEN 10179:2023 / Note: Date of issue 2023-05-26*Intended as replacement for DIN EN 10179 (1990-04).
DIN EN ISO 5378:1994-10 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978); German version EN ISO 5378:1994
DIN EN ISO 4945:2019-03 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018); German version EN ISO 4945:2018
DIN ISO 3946:1986 Starches and derived products; determination of the total phosphorus content; spectrophotometric method; identical with ISO 3946, edition 1982
DIN EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)

Danish Standards Foundation, Determination of total nitrogen content by spectrophotometry

DS/EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
DS/EN ISO 5378:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
DS 285:1990 Water qulity. Total arsenic content. Spectrophotometric method
DS/EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amount) in steels. Spectrophotometric method
DS/EN ISO 3946:1995 Starches and derived products - Determination of total phosphorus content - Spectrophometric method
DS 292:1985 Water analysis. Total phosphor. Photometric method
DS 291:1985 Water analysis. Phosphate. Photometric method
DS/EN 26595:1993 Water quality. Determination of total arsenic. Silver diethyldithiocarbamate spectrophotometric method

Korean Agency for Technology and Standards (KATS), Determination of total nitrogen content by spectrophotometry

KS D ISO 4945:2002 Steel－Determination of nitrogen content－Spectrophotometric method
KS D ISO 4945-2002(2017) Steel－Determination of nitrogen content－Spectrophotometric method
KS H ISO 5378-2023 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 5378:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 3946-2008(2018) Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS H ISO 3946-2023 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS E ISO 6607:2011 Aluminium ores－Determination of total silicon content－Combined gravimetric and spectrophotometric method
KS H ISO 3946:2008 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS E ISO 6607:2021 Aluminium ores — Determination of total silicon content —Combined gravimetric and spectrophotometric method
KS M ISO 5400-2012(2017) Leather－Determination of total silicon content－Reduced molybdosilicate spectrometric method
KS D ISO 1053-2002(2007) Zinc－Determination of copper content?Spectrophotometric method
KS D ISO 1053-2012 Zinc－Determination of copper content?Spectrophotometric method
KS D ISO 17058:2005 Steel and iron－Determination of arsenic content－ Spectrophotometric method
KS D ISO 9441-2022 Steel－Determination of niobium content－PAR spectrophotometric method
KS D ISO 17058:2020 Steel and iron — Determination of arsenic content —Spectrophotometric method
KS E ISO 6607-2011(2016) Aluminium ores－Determination of total silicon content－Combined gravimetric and spectrophotometric method
KS E ISO 8556:2001 Aluminium ores－Determination of phosphorus content－Molybdenum blue spectrophotometric method
KS E ISO 9683-1:2010 Iron ores－Determination of vanadium－Part 1：BPHA spectrophotometric method
KS D ISO 629:2008 Steel and cast iron－Determination of manganese content－Spectrophotometric method
KS D ISO 4829-2:2005 Steel and iron－Determination of total silicon content－Reduced molybdosilicate spectrophotometric method－Part 2：Silicon contents between 0.01 and 0.05 %
KS D ISO 629-2023 Steel and cast iron－Determination of manganese content－Spectrophotometric method

GSO, Determination of total nitrogen content by spectrophotometry

OS GSO ISO 4945:2015 Steel -- Determination of nitrogen content -- Spectrophotometric method
GSO ISO 6491:2005 ANIMAL FEEDING STUFFS – DETERMINATION OF TOTAL PHOSPHORUS CONTENT – SPECTROPHOTOMETRIC METHOD
GSO ISO 5378:2015 Starches and derived products -- Determination of nitrogen content by the Kjeldahl method -- Spectrophotometric method
OS GSO ISO 6491:2005 ANIMAL FEEDING STUFFS – DETERMINATION OF TOTAL PHOSPHORUS CONTENT – SPECTROPHOTOMETRIC METHOD
GSO ISO 13730:2014 Meat and meat products -- Determination of total phosphorus content -- Spectrometric method
GSO ISO 4945:2015 Steel -- Determination of nitrogen content -- Spectrophotometric method
NB/T 11531-2024 Determination of total phosphorus, ammonia nitrogen and permanganate index in coal mine water - Flow injection-spectrophotometry
OS GSO ISO 3946:2015 Starches and derived products -- Determination of total phosphorus content -- Spectrophotometric method
GSO ISO 3946:2015 Starches and derived products -- Determination of total phosphorus content -- Spectrophotometric method
GSO ISO 5400:2014 Leather -- Determination of total silicon content -- Reduced molybdosilicate spectrometric method
OS GSO ISO 19043:2017 Natural rubber latex concentrate -- Determination of total phosphate content by spectrophotometric method
OS GSO ISO 17058:2013 Steel and iron -- Determination of arsenic content -- Spectrophotometric method
GSO ISO 19043:2017 Natural rubber latex concentrate -- Determination of total phosphate content by spectrophotometric method
GSO ISO 17058:2013 Steel and iron -- Determination of arsenic content -- Spectrophotometric method
OS GSO ISO 9441:2015 Steel -- Determination of niobium content -- PAR spectrophotometric method
OS GSO ISO 10153:2015 Steel -- Determination of boron content -- Curcumin spectrophotometric method
BH GSO ISO 9208:2017 Aluminium ores - Determination of vanadium content -- BPHA spectrophotometric method

British Standards Institution (BSI), Determination of total nitrogen content by spectrophotometry

BS EN ISO 4945:2010 Steel. Determination of nitrogen content. Spectrophotometric method
BS EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
BS EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrometric method
BS EN ISO 4945:2018 Steel. Determination of nitrogen. Spectrophotometric method
23/30472739 DC BS EN 10179. Steels. Determination of nitrogen (trace amounts). Spectrophotometric method
BS ISO 17058:2004 Steel and iron - Determination of arsenic content - Spectrophotometric method
BS ISO 17058:2004(2008) Steel and iron — Determination of arsenic content — Spectrophotometric method
22/30446379 DC BS ISO 19043 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method
BS EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS ISO 19043:2015 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method
BS EN ISO 5378:1994(1999) Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrometric method

SCC, Determination of total nitrogen content by spectrophotometry

DANSK DS/EN ISO 4945:2009 Steel – Determination of nitrogen content – Spectrophotometric method
UNE 36317-1:1985 DETERMINATION OF NITROGEN CONTENT OF STEELS. SPECTROPHOTOMETRIC METHOD
NS-EN 10179:2024 Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method
NS-EN ISO 4945:2009 Steel — Determination of nitrogen content — Spectrophotometric method (ISO 4945:1977)
AENOR UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
SPC GB/T 24583.5-2019 Vanadium-nitrogen -- Determination of phosphorus content -- Bismuth molybdenum blue spectrophotometric method (TEXT OF DOCUMENT IS IN CHINESE)
DANSK DS/EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
NS-EN ISO 5378:1994 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method (ISO 5378:1978)
DIN EN 10179 E:2023 Draft Document - Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method; German and English version prEN 10179:2023
BS 5766-3:1981 Methods for analysis of animal feeding stuffs-Determination of total phosphorus content (spectrophotometric method)
DANSK DS/EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophometric method
BS 5697-2:1979 Methods of test for starch and its derivatives and by-products. Determination of nitrogen conteny by the Kjeldahl method ( spectrophotometric method)
BS PD ISO/TS 21826:2020 Iron ores. Determination of total iron content. EDTA photometric titration method
NS-EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)
NS-EN ISO 3946:1994 Starches and derived products — Determination of total phosphorus content — Spectrophotometric (ISO 3946:1982)
BS 7020-9.1:1988 Analysis of iron ores. Methods for the determination of manganese content-Spectrophotometric method

Association Francaise de Normalisation, Determination of total nitrogen content by spectrophotometry

NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
NF V18-106:1980 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method.
NF V18-106*NF ISO 6491:2011 Animal feeding stuffs - Determination of phosphorus content - Spectrophotometric method
NF V03-608*NF EN ISO 5378:1994 Starches and derived products. Determination of nitrogen content by the kjeldahl method. Spectrophotometric method.
NF A06-323:1987 Chemical analysis of steels. Determination of nitrogen content. Molecular absorption spectrophotometric method.
NF V03-613*NF EN ISO 3946:1994 Starches and derived products. Determination of total phosphorus content. Spectrophotometric method.
NF A06-555*NF EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
NF T90-026:1993 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method.
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method
NF T90-139*NF EN ISO 17852:2008 Water quality - Determination of mercury - Method using atomic fluorescence spectrometry
NF A20-430*NF ISO 7834:1988 Iron ores. Determination of arsenic content. Molybdenum blue spectrophotometric method.
NF T90-080:1997 Water quality - Determination of ammonium nitrogen by flow analysis (CFA and FIA) and spectrometric detection.
NF A20-423:1986 Iron ores. Determination of titanium content. Spectrophotometric determination.
NF A20-401:1985 Iron ores. Determination of phosphorus content. Spectrophotometric method.

AENOR, Determination of total nitrogen content by spectrophotometry

UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
UNE-EN ISO 5378:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF NITROGEN CONTENT BY THE KJELDHAL METHOD. SPECTROPHOTOMETRIC METHOD. (ISO 5378:1978).
UNE-EN ISO 3946:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF TOTAL PHOSPHORUS CONTENT. SPECTROPHOTOMETRIC METHOD. (ISO 3946:1982).
UNE 37258:1986 LEAD. DETERMINATION OF ARSENIC CONTENT. SPECTROPHOTOCOLORIMETRY METHOD.
UNE 35026-1:1985 FERROALLIAGES. DETERMINATION OF PHOSPHORUS CONTENT. SPECTROPHOTOMETRIC METHOD

RO-ASRO, Determination of total nitrogen content by spectrophotometry

STAS SR 13257-1996 COFFEE Determination of nitrogen content by the Kjeldahi method Spectrophotometric method
STAS SR 9763-13-1996 Spices and condiments. Determination of nitrogen content by the Kjeldahl method. Spectrophotometric method
STAS SR EN 10179-1994 Chemicat analysis of ferrous materials - Determination of nitrogen (trace amounts) in steel - Spectrophotometric method
SR ISO 6685:1996 Chemical products for industrial use-General method for determination of iron content - 1,10 - Phenanthroline spectrophotometric method
STAS SR 13145-1993 Cast irons and steels. Determination of tantalum content. Spectrophotometrical method
STAS SR 13362-1996 Sodium chloride. Determination of iron. 1,10 - phenanthroline Photometric Method
STAS SR 11039-5-1996 Silicocalcium. Determination of phosphorus content. Spectrophotometric method

Lithuanian Standards Office , Determination of total nitrogen content by spectrophotometry

LST EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
LST EN ISO 5378:2000 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
LST EN ISO 3946:2000 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method (ISO 3946:1982)

YU-JUS, Determination of total nitrogen content by spectrophotometry

JUS H.B8.287-1983 Fertilizers. Determination of content amid-nitrogen. Spectrophotometric method
JUS H.B8.637-1981 Sulphuric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method
JUS H.B8.043-1991 Liquid hydrocarbons. Determination of total chloride content. Spectrophotonetric method
JUS H.G8.418-1991 Reagents. Sodium hvdroxide. Determination of arsenic content. Silver diethvldithiocarbamate spectrophotometric method
JUS H.B8.815-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of copper content - Atomic absorption spectrophotometric method
JUS B.G8.518-1990 AluminiuB ores. Detemiuat ioa of total silicon content. Combived gravlmetric and spectrophotometric metbod
JUS H.G8.130-1984 Reagents. Ammonia solution. Determination of iron content. 1,10—Phenanthrolinespectrophotometric method
JUS H.Z1.137-1985 Testing of industrial vvaters. Determination of nitrite-nitrate and the combined nitrite-nitrate nitrogen, Spectrophotometric method
JUS H.F8.232-1986 Gases. Determination of hydrocarbons content. Infrared spectrophotometric method
JUS B.G8.111-1989 Iron ores. Determination of manganese content. Spectrophotometric nethod
JUS E.Z8.014-1993 Soups,broaths,sauces and seasonings - Spectrophotometric determination of total creatinine content

KR-KS, Determination of total nitrogen content by spectrophotometry

KS H ISO 5378-2008(2023) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 3946-2008(2023) Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS D ISO 4945-2022 Steel — Determination of nitrogen — Spectrophotometric method
KS E ISO 6607-2021 Aluminium ores — Determination of total silicon content —Combined gravimetric and spectrophotometric method
KS D ISO 17058-2020 Steel and iron — Determination of arsenic content —Spectrophotometric method

RU-GOST R, Determination of total nitrogen content by spectrophotometry

GOST 31980-2012 Milk. Spectrometric method for determination of total phosphorus content
GOST 31584-2012 Milk. Spectrophotometric method for determination of total phosphorus content
GOST 28902-1991 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method
GOST R 51482-1999 Meat and meat products. Spectrophotometric method for determination of total phosphorus content
GOST 32009-2013 Meat and meat products. Spectrophotometric method for determination of total phosphorous content
GOST 30181.5-1994 Mineral fertilizers. Method for determination of mass fraction of amide nitrogen in compound fertilizers (spectrophotocolorimetric method)

TR-TSE, Determination of total nitrogen content by spectrophotometry

TS 2466-1976 Nitric Acit For Industrial Use Determination of Ammoniacal Nitrogen Content Spectrophotoraetric Method
TS 3651-1981 METHODS FOR THE ANALYSIS OF WATER — DETERMINATION OF IRON CONTENT — 1,10 Phenanthroline Spectrophotometry Method
TS 2918-1978 PHOSPHORIC ACID FOR INDUSTRIAL USE (INCLUDING FOODSTUFFS) — DETERMINATION OF OXIDES OF NITROGEN CONTENT — 3,4 — XYLENOL SPECTROPHOTOMETRY

NL-NEN, Determination of total nitrogen content by spectrophotometry

NEN 2848-1986 Fruit juices - Determination of the total pectin content - Spectrophotometric method
NEN 6646-1990 Water - Photometric determination of the content of ammonium nitrogen and of the sum of the contents of ammoniacal and organically bound nitrogen according to Kjeldahl by continuous flow analysis
NEN 6489-1982 Water - Photometric determination of total cyanide content
NEN 6483-1982 Water - Potentiometric determination of the total fluoride content

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Determination of total nitrogen content by spectrophotometry

GB/T 5195.10-2006 Fluorspar. Determination of iron content. 1,10-phenanthroline spectrophotometric method
GB/T 6730.89-2024 Determination of thorium content in iron ore - Arsenazo Ⅲ spectrophotometric method
GB/T 24583.5-2019(英文版) Determination of phosphorus content in vanadium-nitrogen alloys - Bismuth phosphomolybdenum blue spectrophotometric method
GB/T 24583.5-2009 Vanadium-Nitrogen alloy.Determination of phosphorus content.The bismuth molybdenum blue spectrophotometry method
GB/T 223.70-2008 Iron,steel and alloy.Determination of iron contents. o-Phenanthroline spectrophotometric method
GB/T 6730.24-2006 Iron ores Determination of total rare earth contentd Chlorophosphonazo mA spectrophotometric method
GB/T 7717.8-1994 Acrylonitrile for industrial use-Determination of content of total aldehydes-Spectrophotometric method
GB/T 20574-2006 Method for determination of total flavonoids in propolis. Colorimetric method
GB/T 4702.7-2016 Chromium metal.Determination of nitrogen content.Distillation-nessler reagent spectrophotometric method
GB/T 6730.44-2017(英文版) Iron ore - Determination of zinc content - 1-(2-pyridyl azo)-2-naphthol spectrophotometric method
GB/T 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB/T 4699.3-2007 Ferrochromium, silicochromium and nitrogen-bearing ferrochromium.Determination of phosphorus content.Molybdobismuthylphosphoric blue speckophotometric method and the molybdenum blue spectrophotometric method
GB/T 13748.9-2005 Chemical analysis methods of magnesium and magnesium alloys.Determination of iron content.Orthopenanthroline spectrophotometric method
GB/T 30389-2013 Chillies and chilli oleoresins.Determination of total capsaicinoid content.Spectrophotometric methods
GB/T 6730.24-1986 Methods for chemical analysis of iron ores--The arsenazo 3 photometric method for the determination of rare earth elements content
GB/T 17528-1998 Determination of piperine content--Spectrophotometric method
GB/T 6730.73-2016(英文版) Iron ores—Determination of total iron content—EDTA photometric titration method
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
GB/T 5686.4-2022 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of phosphorus content—Molybdenum blue spectrophotometric method and bismuth phosphomolybdate b
GB/T 20931.9-2007 Methods for chemical analysis of lithium Determination of nitrogen content Mercuric potassium iodide spectrophotometric method
GB/T 11060.8-2012 Natural gas.Determination of sulfur compound.Part 8:Determination of total sulfur content by ultraviolet fluorescence method
GB/T 14849.1-2007 Methods for chemical analysis of silicon metal-Part 1:Determination of iron content-1,10-Phenanthrolion spectrophotometric method
GB/T 223.49-1994 Methods for chemical analysis of iron,steel and alloy. Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content
GB/T 8220.2-1998 Methods for chemical analysis bismuth--Determination of iron content--1,10-Phenanthroline photometric method
GB/T 13748.9-2013 Chemical analysis methods of magnesium and magnesium alloys.Part 9:Determination of iron content.Orthopenanthroline spectrophotometric method
GB/T 5059.6-2007 Ferromolybdenum-Determination of phosphorus content-Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue spectrophotometrc method
GB/T 2441.2-2001 Determination of urea Determination of biuret content Spectrophotometric method
GB/T 8704.7-2009 Ferrovanadium.Determination of phosphorus content.The molybdenum blue photometric method

Professional Standard - Agriculture, Determination of total nitrogen content by spectrophotometry

NY/T 2332-2013 Determination of total sugars in red ginseng.Spectrophotometry
NY/T 1116-2006 Fertilizers-Determination of nitrate nitrogen content.UItraviolet spectro-photometric method
NY/T 30-1986 Determination of rare earth oxide content in soil.Chlorophosphonazo-p-hippuric acid photometric method
GB 6260-1986 Determination of Total Oxidized Rare Earth in Soil Spectrophotometric Method for Azochlorophosphorus Hippurate

Group Standards of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

T/NAIA 097-2021 Determination of total phenolic content in Lycium barbarum by spectrophotometric method
T/ZCSIA 8-2023 Determination of total polyphenol content in sweet potato leaves by spectrophotometric method
T/ZJATA 0025-2024 Water quality Total nitrogen determination Prefabricated chromotropic acid reagent spectrophotometry
T/ZCSIA 9-2023 Determination of total flavonoid content in strawberries and their products by spectrophotometric method
T/ZCSIA 7-2023 Spectrophotometric method for determination of total phenolic content in large cherries and their products
T/HNNMIA 91-2023 Bauxite-Determination of vanadium content-Spectrophotometric method
T/YNRZ 011-2024 The Determination of Total Amino Acids in Coffee beans With Spectrophotometry

CZ-CSN, Determination of total nitrogen content by spectrophotometry

CSN 65 1025 Cast.10-1989 Sulphuric acid for industrial use. pectrophotometric method for the etermination of total nitrogen xides
CSN EN 10 179-1993 Chemical analysis of ferrous metals — Determination of nitrogen (trace amounts) in steels — Spectrophotometric method
CSN ISO 9061:1992 Acid-grade and ceramic-grade fluorspar - Determination of iron content - 1,10-Phenantroline spectrometric method
CSN ISO 9438:1992 Metallurgical-grade fluorspar - Determination of total phosphorus content - Reduced molybdophosphate spectrometric method
CSN ISO 4942:1993 Steel and iron. Determination of the vanadium content. N-BPHA spectrophotometric method
CSN ISO 4751:1992 Copper and copper alloys - Determination of tin content - Spectrometric method

工業(yè)和信息化部, Determination of total nitrogen content by spectrophotometry

YB/T 4566.6-2016 Determination of phosphorus content in vanadium iron nitride bismuth phosphorus molybdenum blue spectrophotometry
YB/T 4582.6-2017 Determination of silicon ferromanganese nitride content sodium periodate spectrophotometry
YB/T 4582.3-2017 Determination of phosphorus content in silicon iron nitride bismuth phosphorus molybdenum blue spectrophotometry
YB/T 4582.2-2017 Determination of ferrochromium content in silicon nitride diphenylcarbazide spectrophotometric method
YB/T 4582.9-2017 Determination of titanium silicon nitride content diantipyrine methane spectrophotometry

農(nóng)業(yè)農(nóng)村部, Determination of total nitrogen content by spectrophotometry

NY/T 3676-2020 Determination of total triterpene content in Ganoderma lucidum by spectrophotometric method

國家市場監(jiān)督管理總局、中國國家標(biāo)準(zhǔn)化管理委員會(huì), Determination of total nitrogen content by spectrophotometry

GB/T 24583.5-2019 Vanadium-nitrogen—Determination of phosphorus content—Bismuth molybdenum blue spectrophotometric method
GB/T 223.37-2020 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation
GB/T 39544-2020 Natural rubber latex concentrate—Determination of total phosphate content—Spectrophotometric method
GB/T 11060.8-2020 Natural gas—Determination of sulfur compounds—Part 8：Determination of total sulfur content by ultraviolet fluorescence method

Professional Standard - Chemical Industry, Determination of total nitrogen content by spectrophotometry

HG/T 4327-2012 Reclaimed water.Determination of total iron content.Spectrophotometric method

BSI, Determination of total nitrogen content by spectrophotometry

BS EN 10179:2024 Steels. Determination of nitrogen (trace amounts). Spectrophotometric method

BE-NBN, Determination of total nitrogen content by spectrophotometry

NBN T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN-EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
NBN T 03-024-1979 Sulphuric acid and oleum for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN P 32-004-1977 Zinc - Determination of copper content -Spectrophotometric method
NBN-EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method (ISO 3946:1982)
NBN T 04-304-1983 Urea for indus trial use - Determination of iron content-2,2'-Bipyridyl photometric method

Ningxia Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB64/T 1082-2015 Determination of total flavonoids content in wolfberry - spectrophotometric colorimetry
DB64/T 1515-2017 Determination of Total Glucosides in Sheep Placenta Capsules by Ultraviolet Spectrophotometry

Professional Standard - Ferrous Metallurgy, Determination of total nitrogen content by spectrophotometry

YB/T 5330-2009 Determination of Ferrovanadium Pentoxide Content O-Phenanthroline Spectrophotometry
YB/T 5191-2007 High pure graphite materials-Determination of total rare earths content-spectrophotometric
YB/T 5191-1993 Spectrophotometric determination method of total rare earth element content in high-purity graphite materials
YB/T 190.8-2014 Continuous casting powder.The determination of iron content.The o-phenanthroline spectrophotometric method and the flame atomic absorption method
YB/T 505.5-2007 Vanadium and titanium slag Determination of ferric oxide content-Photometric method

ES-UNE, Determination of total nitrogen content by spectrophotometry

UNE-EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)

Professional Standard - Aviation, Determination of total nitrogen content by spectrophotometry

HB 5297.17-2001 Chemical Analysis Method of Titanium Alloy AzoarsenicⅢ Spectrophotometric Determination of Zirconium Content
HB 5297.20-2001 Chlorophosphine azo Ⅲ Spectrophotometric Method for Chemical Analysis of Titanium Alloy Determination of Cerium Content
HB 5422.23-1989 Determination of zirconium content by arsenazoⅢ absorptiophotometric method for chemical analysis of copper alloy
HB 5220.43-1995 Determination of Lanthanum Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.42-1995 Determination of Cerium Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.36-1995 Determination of Zirconium Content by Arsenazo Ⅲ Direct Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.48-1995 Superalloy Chemical Analysis Method Water Steam Distillation - Volumetric Method (or Absorptiometry) Determination of Nitrogen Content
HB 5220.42-2008 Methods for chemical analysis of superalloys. Part 42: Determination of cerium content by DBC-arsenazo photometric method
HB 5220.43-2008 Methods for chemical analysis of superalloys. Part 43: Determination of lanthanum content by DBC-arsenazo photometric method
HB 5220.38-1995 Extraction and Separation by Chemical Analysis Method of Superalloy - Determination of Cerium Content by ArsenazoⅢ Absorbance Spectrophotometry
HB 5219.19-1998 Determination of Cerium Content by Spectrophotometric Method of Tribromoarsine in Magnesium Alloy
HB 5220.48-2008 Methods for chemical analysis of superalloys. Part 48: Determination of nitrogen content by water vapour distillation-volumetric method( or photometric method)
HB 5220.39-1995 Chemical Analysis Method of Superalloys PMBP Direct Extraction-ArsenazoⅢ Absorbance Spectrophotometry Determination of Total Rare Earth

PT-IPQ, Determination of total nitrogen content by spectrophotometry

NP 1841-1985 fish. Determination of trimethylamine nitrogen content (N-TMA). photometry

VN-TCVN, Determination of total nitrogen content by spectrophotometry

TCVN 2825-1999 Aluminium ores.Determination of total silicon content.Combined gravimetric and spectrophotometry method
TCVN 7724-2007 Water quality.Determination of merdury.Method using atomic fluorescence spectrometry

Heilongjiang Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB23/T 2963-2021 Determination of Trace Calcium Content in Natural Flake Graphite by Calcium-Arsenazo Ⅲ Spectrophotometric Method
DB23/T 1382-2010 Spectrophotometric method for determination of urea content in feed

IT-UNI, Determination of total nitrogen content by spectrophotometry

UNI 7336-1974 Chemical analysis of ferrous materials. Determination of nitrogen in steel. Spectrophotometric method.

Taiwan Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

CNS 14573-2001 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method

Anhui Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB34/T 2743-2016 Spectrophotometric method for determination of total flavonoids content in Huai Mi and its products

中華人民共和國國家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局、中國國家標(biāo)準(zhǔn)化管理委員會(huì), Determination of total nitrogen content by spectrophotometry

GB/T 6730.44-2017 Iron ores—Determination of zinc content—1-(2-pyridylazo)-2-naphthol spectrophotometric method
GB/T 5195.6-2017 Fluorspar—Determination of phosphorus content—Photometric method

未注明發(fā)布機(jī)構(gòu), Determination of total nitrogen content by spectrophotometry

DIN EN ISO 4945 E:2018-01 Determination of steel nitrogen by spectrophotometry (draft)

Professional Standard - Petrochemical Industry, Determination of total nitrogen content by spectrophotometry

SH/T 0020-1990 Determination of phosphorus content in gasoline (spectrophotometry)
SH/T 0683-1999 Standard test method for rhenium in reforming catalysts.Spectrophotometry

Jilin Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)

American National Standards Institute （ANSI), Determination of total nitrogen content by spectrophotometry

BS ISO 19043:2023 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method (British Standard)

Professional Standard - Non-ferrous Metal, Determination of total nitrogen content by spectrophotometry

YS/T 535.4-2009 Chemical analysis methods of sodium fluoride.Part 4:Determination of iron content.1,10-phenanthroline spectrophotometric method
YS/T 536.2-2006 Bismuth Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 74.7-1994 Cadmium Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content

Professional Standard - Environmental Protection, Determination of total nitrogen content by spectrophotometry

HJ 668-2013 Water quality.Determination of total nitrogen by flow injection analysis (FIA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 636-2012 Water quality.Determination of total nitrogen.Alkaline potassium persulfate digestion UV spectrophotometric method
HJ 667-2013 Water quality.Determination of total nitrogen by continuous flow analysis (CFA) and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 1191-2021 Spectrophotometric method for the determination of water quality azide

Inner Mongolia Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB15/T 3364-2024 Determination of polysaccharide content in Artemisia annua seeds Spectrophotometric method

Shandong Provincial Standard of the People's Republic of China, Determination of total nitrogen content by spectrophotometry

DB37/T 3314-2018 Determination of Alginic Acid Content in Fertilizer by Spectrophotometry

Professional Standard - Water Conservancy, Determination of total nitrogen content by spectrophotometry

SL 84-1994 Determination of nitrogen (nitrate)(Ultraviolet spectrophtometric method)

Professional Standard - Nuclear Industry, Determination of total nitrogen content by spectrophotometry

EJ/T 20167-2018 Determination of nitrogen content in reprocessed uranium trioxide powder by distillation-Nessler reagent spectrophotometry

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