摘要
研究了在盐酸介质中,利用钒(V)催化溴酸钾氧化乙基紫褪色反应,建立了催化光度法测定痕量钒的新方法。方法的线性范围为0.2～1.6μg/L,检出限量为0.2μg/L,钒的测定相对标准偏差为1.24％～2.78％。Mn^(2+)、Cu^(2+)、Fe^(2+)、Fe^(3+)、Cr^(3+)、Pb^(2+)的干扰为50倍,K^+、Na^+、Ca^(2+)、Mg^(3+)、Cl^-、I^-等100倍以上无明显干扰。本法可以直接用于水样测定。
A catalytic procedure for determination of trace vanadium is proposed based on vanadium catalyzed potassium bromate ethylvoilet redox reaction in HCI medium. The calibration graph is linear for a range q 0.2 ~ 1.6 μg/L, and the detection limit is 0.2 fig/L, RSD is 1.24% ~ 2.78% . There is not obvious interference with 50 times of Mn^(2+)?Cu^(2+)? Fe^(2+)?Fe^(3+)?Cr^(3+)?Pb^(2+) and 100 times of K^+? Na^+?Ca^(2+)?Mg^(2+)?Cl^-?I^- .The procedure has been used to determine water sample directly.
出处
《中国纺织大学学报》
CSCD
2000年第5期108-110,共3页
Journal of China Textile University
关键词
催化光度法
钒
乙基紫
溴酸钾
测定
痕量钒
catalytic kinetic spectrophotometry , vanadium , ethylvoilet
