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用表面活性剂与邻苯二酚紫、溴代邻苯三酚红、邻苯三酚红、茜素紫和苯芴酮组成三元络合物的方法测定钨,摩尔吸光系数一般达4～6×10~4,苯芴酮则达1.1×10~5,但选择性较差,钼、锡等元素干扰。文献对钼、锡等干扰作了掩蔽或分离,亦只能容许200微克钼和50微克锡,而铌、钛的允许量十分少。
Tungsten was determined by a ternary complex composed of catechol violet, bromo pyrogallol red, pyrogallol red, alizarin violet and phenyl fluorenone. The molar extinction coefficient was generally 4 ~ 6 × 10 ~ 4, benzene fluorenone reached 1.1 × 10 ~ 5, but the selectivity is poor, molybdenum, tin and other elements interfere. Literature on the molybdenum, tin and other interference were masked or separated, only to allow 200 micrograms of molybdenum and 50 micrograms of tin, and niobium, titanium, the allowance is very small.