Triton X-100存在下用孔雀绿的催化动力学光度法测定痕量锰的研究

Determination of Trace Manganese by Catalytic Kinetics Spectrophotometry with Malachite Green in the Presence of Triton X-100

在HAc NaAc介质中 ,TritonX 10 0对锰 (Ⅱ )催化高碘酸钠氧化孔雀绿的褪色反应有强烈的增敏作用 .研究了影响其反应速度的最佳条件 ,建立了测定锰的灵敏的催化光度法 .方法线性范围为 0 .2～ 7.0 μg/L ,检测下限为 5 .0× 10 -6mg/L .该法用于黄豆、花生、红枣、茶叶中痕量锰的测定 ,结果令人满意 .

WT5”BZ]A sensitive catalytic spectrophotometry method for the determination of trace manganese has been studied. In HAc NaAc mediums and in the presence of triton X 100, manganese (Ⅱ) has a strong sensibilization in the reaction in which malachite green is oxidized by sodinm periodate. The detection limit of the method is 5.0×10 -6 mg/L. The range of measurement is 2.0×10 -4 ～7.0×10 -3 mg/L Mn(Ⅱ). The method has been successfully applied to the determintion of manganese in bean, peanut, jujube and tea.[WT5”HZ]