二安替比林甲烷光度法测定铜合金中钛

Spectrophotometric determination of titanium in copper alloy with diantipyrylmethane

研究了二安替比林甲烷与钛的反应,建立了直接测定铜合金中钛的光度分析方法。在1.8mol/L盐酸介质中,钛与二安替比林甲烷形成1∶3的黄色络合物,此络合物最大吸收波长位于390nm,表观摩尔吸光系数为1.51×104L.mol-1.cm-1。在50mL溶液中,钛含量在0.50～50μg符合比尔定律。方法用于铜合金中钛的测定,相对标准偏差RSD为1.1%～1.8%,回收率为99%～102%。

The determination of titanium in copper alloy with diantipyrylmethane by spectrophotometry is studied. In the medium of 1.8 mol/L HC1, titanium reacts with the diantipyrylmethane to form a 1 ： 3 yellow complex, which exhibits an absorption maximum at 390 nm with an apparent molar ab- sorptivity of 1.51 × 10^4 L ·mo1^-1 · cm^-1. Beer＇s law is obeyed in the rang of 0.50--50μg for titanium in 50 mL solution. The results for determining titanium by this method are consistent with certified values. This method has been used to determine titanium in copper alloy with the recoveries of 99 %-- 102% and the RSDs of 1.1%--1.8%.