UNE 55592:1981 表面活性劑 用作洗滌劑配方原料的硫酸和發(fā)煙硫酸 總酸度的測定和發(fā)煙酸的游離三氧化硫含量的計(jì)算 滴定法
SURFACE ACTIVE AGENTS. SULPHURIC ACID AND OLEUMS FOR USE AS RAW-MATERIALS IN DETERGENTS FORMULATIONS. DETERMINATION OF TOTAL ACIDITY, AND CALCULATION OF FREE SULPHUR TRIOXIDE CONTENT OF OLEUMS. TITRIMETRIC METHOD