流动注射在线分离富集-电感耦合等离子体原子发射光谱法测定痕量六价铬  

Determination of trace chromium (Ⅵ) by flow injection on-line separation and preconcentration with inductively coupled plasma-atomic emission spectrometry

作　　者：鲁丹 刘雅萍 

机构地区：[1]浙江出入境检验检疫局技术中心,杭州310012

出　　处：《中国卫生检验杂志》2008年第3期399-400,412,共3页Chinese Journal of Health Laboratory Technology

基　　金：浙江出入境检验检疫局科研基金资助项目(ZK200515)

摘　　要：目的:建立痕量六价铬测定的新方法。方法:通过酸式氧化铝微柱在线分离富集,实现了流动注射在线分离富集-电感耦合等离子体原子发射光谱法测定痕量六价铬。结果:优化了流动注射测定条件,研究了共存离子的干扰。本法的检出限为0.70μg/L,对10.0μg/L六价铬测定8次的相对标准偏差为2.96%,平均回收率为101.1%,分析速度为33样/h,富集倍数为10倍。结论:本法简便、快速、准确,灵敏度、精密度和自动化程度高。适用于痕量六价铬的测定。Objietive：To establish a new method for determination of trace chromium（ Ⅵ ）. Methods：A method for the determination of trace chromium（ Ⅵ ） by flow injection on - line separation and preconcentration with inductively coupled plasma - atomic emission spectrometry using on a microcolumn packed with alumina（ acidic form） was developed. Results ：The working parameters were discussed and optimized. The interference of co - existing ions had been studied. The detection limit was 0. 70 μg,/ L. The relative standard deviations was 2. 96% at 10. 0 μg,/L chromium（ Ⅵ ） （ n = 8）. The average recovery was 101.1%. Analytical frequency was 33 samples/h. The concentration enhancement of Cr（ Ⅵ ） was 10 times. Conclusion： The method is simple, quick, accurate and sensitive. It is feasible for determination of trace chromium（ Ⅵ ）.

关 键 词：六价铬 酸式氧化铝微柱 流动注射 在线分离富集 电感耦合等离子体原子发射光谱法 

分 类 号：O657.31[理学—分析化学]