Standard test method for pyridine bases in cresylic acid by direct titration 直接滴定法测定甲苯基酸中吡淀碱的标准试验方法
2.
Surface active agents . technical alkane sulfonates . determination of alkane monosulfonates content by direct two - phase titration 表面活性剂.工业用烷基磺酸盐.用双相直接滴定法测定烷基单磺酸盐含量
3.
Surface active agents . detergents . determination of anionic - active matter by manual or mechanical direct two - phase titration procedure 表面活性剂.洗涤剂.用手工或机械双相直接滴定法测定活性阴离子含量