离子色谱柱后衍生法测定汞、锰、镉、钴、锌、镍和铜  

Simultaneous Determination of Mercury, Manganese, Cadmium, Cobalt, Zinc, Nickel and Copper by Ion Chromatography With On-column and Post-column Derivatisation

作　　者：侯艳文[1] 牟世芬[2] 闫炎[2] 刘锋[1] 王汇彤[2] 李克安[1] 童沈阳[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871 [2]中国科学院生态环境研究中心,北京100085

出　　处：《分析化学》1997年第11期1241-1245,共5页Chinese Journal of Analytical Chemistry

摘　　要：提出了用离子色谱柱后衍生法同时测定汞和其它金属离子的新方法。本方法中样 品离子以阴离子交换分离，用２－（５－溴－２－吡啶偶氮）－５－二乙氨基酚（５－Ｂｒ－ＰＡＤＡＰ）和非离子 表面活性剂 Ｔｒｉｔｏｎ Ｘ－１００显色体系作柱后衍生，分光光度法测定。方法的检出限对 Ｈｇ２＋、 Ｍｎ２＋、Ｃｄ２＋、Ｃｏ２＋、Ｚｎ２＋、Ｎｉ２＋和Ｃｕ２＋分别为２０、９、９、８、２、１００和 ３ μｇ／Ｌ。方法用于人头发样 品中微量汞的分析取得了满意结果。A new method for simultaneous determination of mercury (Ⅱ) and some other metals by HPIC was established, which involves an on-column derivatisation with 2, 6-pyri- dine-dicarboxylic acid (PDCA ), an anion-exchange separation and a post-column chro- mogenic reaction with 2-[(5-bromo-2-pyridyl)-azo] phenol (5-Br-PADAP). The procedure was optimized with respect to the composition and pH of the eluent and the reagent. The detection limits for Cu2+, Ni2+, Zn2+, Co2+, Cd2+, Mn2+, and Hg2+ are 3, 100, 2, 8, 9, 9, 20 μg/L, respectively. The method has been applied to the determination of mercury in 300 mg human hair sample and the results obtained agree very well with the value announced.

关 键 词：离子色谱法 柱后衍生 汞 锰 镉 钴 锌 镍 铜 

分 类 号：O614.243[理学—无机化学] X132[理学—化学]