GB/T 223.66-1989

Methods for chemical analysis of iron，steel and alloy--The thiocyanate chlorpromazine hydrochloride--chloro form extraction photometric method for the determination of tungsten content

钢铁及合金化学分析方法 硫氰酸盐-盐酸氯丙嗪-三氯甲烷萃取光度法测定钨量