离子色谱法测定环境空气中氯乙酸研究

建立了测定环境空气中氯乙酸的离子色谱法。采用碳酸钠和碳酸氢钠淋洗液作为吸收液采集大气中氯乙酸，氯乙酸吸收后转化成较稳定的氯乙酸钠，阴离子分离柱分离，过滤后直接进样分析，时间定性，峰高定量．对实际废气样品进行分析，氯乙酸的回收率94．O％-103．7％。当采样体积为30L时，氯乙酸方法最低检出浓度0．01mg/m^3。该方法分析速度快，所需样品量少，无需使用机试剂和有毒有害试剂，前处理简便，灵敏、可靠．适用于环境空气和工业废气中氯乙酸的测定。

Determination of Chloroacetic Acid in Air by Ion Chromatography

Ion chromatography was adopted to determine chloroacetic acid in ambient air. Taking sodium carbonate and sodi- um bicarbonate leaching solution as absorption liquid, this study collected the chloroacetic acid in the atmosphere, which turned into more stable sodium chloroacetate. The sample is then separated with anion separation column and filtered before the analysis. The peak of actual gas samples was analyzed. The recovery ratio of chloroacetic acid is 94% - 103.7%. When the sampling vol- ume was 30 L, the minimum detectable concentration of chloroacetic acid is 0. 01 mg./m3. This method is fast, needs small sam- ple quantity, without the use of toxic reagents. The pretreatment procedure is simple, sensitive and reliable, suitable for determi- nation of chloroacetic acid in ambient air and in industrial waste gas.