应用钨蓝法测定锋钢中钨时,钼生成红色络合物干扰测定,定性分析说明该络合物为磷钼钛三元杂多酸,根据Babko和Murata等利用此杂多酸测定钛,测得此络合物组成比为P:Ti:Mo=1:1:12,其还原产物为特征的“蓝色”。在本法测定条件下得到的是红色络合物。用连续变更法得到该络合物组成比Mo:Ti:P=1:1:6。此三元络合物在高酸度下(3M)迅速生成且不被氯仿所萃取,因此不同于三元杂多络合物。 Determination of tungsten in front steel by the method of tungsten blue, molybdenum red complex interference determination, qualitative analysis shows that the complex is phosphorus molybdenum titanium ternary heteropolyacid, according to Babko and Murata use of this heteropoly acid determination of titanium, The composition ratio of this complex was measured as P: Ti: Mo = 1: 1: 12, and its reduction product was characterized as “blue”. In the determination of the conditions obtained under the red complex. The complex composition ratio Mo: Ti: P = 1: 1: 6 was obtained by the continuous modification method. This ternary complex is rapidly formed at high acidity (3M) and is not extracted by chloroform and thus differs from the ternary heteropoly complex.