二巯基丙醇衍生气相色谱-微波诱导等离子体-原子发射光谱测定砷的研究  

Determination of Inorganic Arsenic in the Polluted Water with Gas Chromatography Microwave Induced Plasma Atomic Emission Spectrometry

作　　者：周黎明[1] 曲刚莲[1] 顾惠芬[1] 钟玉征[1] 

机构地区：[1]防化指挥工程学院分析测试中心

出　　处：《分析科学学报》1997年第2期127-129,共3页Journal of Analytical Science

基　　金：中国人民解放军总参兵种部科研基金

摘　　要：用气相色谱－微波等离子体－原子发射光谱检测器（ＧＣ－ＭＩＰ－ＡＥＳ）测定水中微量无机砷．在酸性条件下，Ａｓ（Ⅲ）与２，３－二巯基丙醇（ＢＡＬ）反应生成挥发性的环状二硫胂衍生物，被甲苯萃取．在１８１．３７９ｎｍ和１８９．０４１ｎｍ处ＧＣ－ＭＩＰ－ＡＥＳ分别检测衍生物中硫砷的发射信号．检出限为１５ｐｇ（以砷计），加标回收率９６．３５－１０６．０３％，变异系数＜４．５％．This paper describes the method of determining microamount inorganic arsenic compounds in polluted water with gas chromatography microwave induced plasma atomic emission spectrometry(GC MIP AES). As(Ⅲ) reacts with 2,3 dimercaptopropanol(BAL) producing volatile derivative compound in the acidic solution. The derivative was extracted by toluene. Sulfur and arsenic elements of the derivative were detected by GC MIP AES using lines at 181.379nm (S) and 189.042nm, respectively. The detection limit is 15pg As. The recoveries of spiked compound range from 96.35% to 106.03%. Variation coefficient is less than 4.5% (n=5).

关 键 词：气相色谱 原子发射光谱 二巯基丙醇 MIP 

分 类 号：O613.63[理学—无机化学]