催化极谱法测定钢中痕量钒  

Determination of trace vanadium in steel by catalytic polarography

作　　者：严规有[1] 夏姣云[1] 李竹英[1] 杨娟玉[1] 王晓敏[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《冶金分析》2003年第1期30-31,29,共3页Metallurgical Analysis

摘　　要：在 pH4 0的苯二甲酸氢钾介质中 ,有KBrO3存在的情况下 ,V 与邻苯二酚紫 (CV )生成络合物 ,在 -0 83V(vs SCE)处出现一灵敏的极谱峰。峰电流与V 的浓度在 8× 10 - 8～ 2 4× 10 - 6 mol/L范围内呈线性关系 ,检出限为 2×10 - 8mol/L。体系选择性好 ,灵敏度高 ,用于钢中痕量钒的测定 ,重复性好 ,结果满意。A sensitive and selective polarographic method has been developed for the determination of vanadium.The well defined derivative oscillopolarogaphic wave is observed in the potential range from-0.6 to-1.1V(vs.SCE) for vanadium*% in the system containing 6×10 -5 mol/L catechol violet(CV),1×10 -2 mol/L potassium bromate and 1.2×10 -2 mol/L potassium biphthalate.The peak current is proportional to the concentration of vanadium in the range of 8×10 -8 -2.4×10 -6 mol/L.The detection limit is 2×10 -8 mol/L.This method has been successfully applied to the determination of trace vanadium in the reference samples of steel.

关 键 词：催化极谱法 测定 钢 钒 

分 类 号：TG115.3[金属学及工艺—物理冶金]