氯酸钾体系催化动力学光度法测定痕量钒(Ⅱ)  

Catalytic kinetic spectrophotometric determination of trace vanadium

作　　者：沈淑君[1] 邹小勇[2] 

机构地区：[1]漳州职业技术学院食品与生物工程系,漳州363000 [2]中山大学化学与化学工程学院,广州510275

出　　处：《分析试验室》2012年第7期87-89,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了在0.1 mol/L H3PO4介质中,活化剂抗坏血酸的作用下,V(Ⅴ)催化KClO3氧化甲基红褪色的指示反应,由此建立了一种测定痕量V(Ⅱ)的催化动力学光度新方法。研究了影响该催化褪色反应的因素。方法的线性范围为0.09～7.0 ng/mL,检出限为2.9×10-2 ng/mL。方法用于实际样品的测定。A new catalytic kinetic spectrophotometry was presented for the determination of trace vanadium（Ⅴ）.The catalytic effect was investigated for vanadium（Ⅴ） on the oxidation of methyl red（C15H15N3O2）by potassium chlorate（KClO3）with ascorbic acid（C6H8O6）as an activating agent in phosphoric acid solution（0.1 mol/L）.The linear range is 0.09~7.0 ng/mL and the detection limit is 2.9×10-2 ng/mL.The proposed method has been successfully applied to the determination of vanadium（Ⅴ） in water and food samples,and the satisfactory results were obtained.

关 键 词：催化动力学光度法 甲基红 钒(V) 

分 类 号：O657.3[理学—分析化学]