光度法测钨,文献中虽有大量报道,但灵敏、简便、快速的方法为数极少,硫氰酸盐测钨文献已有报道,但这些方法灵敏度不高,有的还使用有机溶剂进行萃取。硫氰酸盐-结晶紫浮选光度法测定钨的灵敏度虽较高(ε=3.2×10~5dm~3·mol~(-1)·cm~(-1)),但操作繁琐,还用甲苯作溶剂。还有人提出硫氰酸盐-三甲基胺、二苯基胺萃取光度法测定痕量钨,但都要使 Spectrophotometric determination of tungsten, although a large number of reports in the literature, but the number of sensitive, simple and rapid method is very small, thiocyanate measured tungsten literature has been reported, but these methods are not sensitive, and some also use organic solvents for extraction . The sensitivity of thiocyanate - crystal violet flotation spectrophotometry was high (ε = 3.2 × 10 ~ 5dm ~ 3 · mol -1 (cm -1)) but the operation was cumbersome. Toluene as a solvent. Others have proposed thiocyanate-trimethylamine, diphenylamine extraction spectrophotometric determination of trace tungsten, but should make