巯基葡聚糖凝胶分离催化动力学光度法测定痕量钒(V)的研究  

Catalytic Kinetic Spectrophotometric Determination of Trace Vanadium(Ⅴ) Separated by Mercapto containing Dextran Gel

作　　者：李慧芝[1] 周长利[1] 赵淑英[1] 安贵祥 

机构地区：[1]山东建材学院应化系,山东济南250022

出　　处：《化学世界》2000年第3期153-156,共4页Chemical World

摘　　要：研究了在pH1.0酸性介质中,痕量钒(V)催化溴酸钾氧化变色酸及抗坏血酸体系的反应和动力学条件,建立了催化动力学光度法测定痕量钒(V)的新方法,该方法的检出限为5.03×10-11gmL,线性范围为0.04～1.4μg25mL,将该体系用于巯基葡聚糖凝胶分离后测定痕量钒(V),方法的选择性灵敏度高,结果令人满意。In acidic medium of pH1.0, trace V(Ⅴ) can catalyze the potassium bromate to oxidize chromotropic acid and ascorbic acid. This kinetic conditions were studied. A kinetic spectrophotometric method for the determination of trace V(Ⅴ) was established with detection limit 5.03×10 -11 g/mL V(Ⅴ). This measurement is in the range of 0.04~1.4 μg/25 mL for V(Ⅴ). The common metal ions can be separated by mercapto containing dextran gel.

关 键 词：钒(V) 溴酸钾 变色酸 测定 催化光度法 

分 类 号：O614.511[理学—无机化学] O657.32[理学—化学]