示波极谱法测定空气中微量砷化氢  被引量:2

Determination of Trace Arsenic Hydride in Air by Oscilloscopic Polarography

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作  者:陈桂贻[1] 何春兰[1] 高喻宏[1] 

机构地区:[1]湖南省劳动卫生职业病防治所,长沙410007

出  处:《环境与健康杂志》2001年第4期245-246,共2页Journal of Environment and Health

摘  要:研究测定空气中砷化氢的新方法。采用碘溶液吸收与氧化 ,于硫酸 -碘化钾 -碲底液中示波极谱法测定。砷化氢在 - 0 .6 4V(VS.SCE)处呈现灵敏吸附波 ,波高与砷化氢含量在 0 .0 0 5~ 1μg/ ml范围内呈良好的线性关系 ,检出限为0 .0 0 5 μg/ ml,变异系数为 2 .1%~ 5 .3% ,加标回收率 95 %以上。该法操作简便、快速 。To study a new method for determination of trace arsenic hydride in air The arsenic hydride in air samples was absorbed and oxidated by iodine solution then was determined in the base solution of H 2SO 4 KI H 2TeO 3 by osilloscopic polarography Arsenic hydride revealed a sensitive adsorption peak at the potential of -0 64 V(VS SCE) A good linear relationship was observed between the adsorption peak heights and the concentrations of arsenic hydride in the range of 0 005~1 μg/ml The detection limit was 0 005 μg/ml The coefficient of variation ranged from 2 1% to 5 3% The recovery rate of adding standard material was more than 95% The method was easy to operate and rapid,which was suitable for determination of trace arsenide

关 键 词:示波极谱法 砷化氢 空气 吸附波 大气监测 空气监测 

分 类 号:R122[医药卫生—环境卫生学] X831[医药卫生—公共卫生与预防医学]

 

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