高碘酸钾-靛红体系催化光度法测定钢中微量钒  

Catalytic spectrophotometric determination of micro vanadium in steel with potassium periodate indigo carmine system

作　　者：白林山[1] 金斌[1] 

机构地区：[1]安徽工业大学化工系,安徽马鞍山243002

出　　处：《冶金分析》2001年第5期49-51,共3页Metallurgical Analysis

摘　　要：研究了钒 对KIO4 氧化靛红褪色反应的催化作用 ,建立了一种测定微量钒的方法。在室温 2 2℃下 ,钒量在 0～4 0 μg/mL范围内与ΔA呈线性关系 ,检出限为 0 1μg/mL。在NaF及尿素存在下 ,多数常见离子无干扰。方法简便 ,灵敏度较高 ,用于钢中钒的测定 。A kinetic method for the determination of V*%was developed, it was based on the catalysis of V*% to the fading reaction of indigo carmine oxidized by KIO 4 in the medium of 1 mol/L H 3PO 4 The linear range and detection limit are 0-4 0μg/mL and 0 1μg/mL,respectively The apparent activation energy of the quasi zero order reaction is 76 7kJ/mol In the presence of NaF and urea,most of the common ions did not interfere to the determination of V*% The method is rapid,selective and sensitive It was applied to the direct determination of trace vanadium in steel with satisfactory results

关 键 词：钒 靛红 催化光度法 钢 高碘酸钾 测定 

分 类 号：TG115.33[金属学及工艺—物理冶金]