引用本文:张洋阳,李双,孟静.顶空-气相色谱法测定水中溴乙烷[J].环境监控与预警,2020,12(3):39-42
ZHANG Yang-yang,LI Shuang,MENG Jing.Headspace Gas Chromatography for the Determination of Bromoethane in Water[J].Environmental Monitoring and Forewarning,2020,12(3):39-42
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顶空-气相色谱法测定水中溴乙烷
张洋阳,李双,孟静
作者单位
张洋阳,李双,孟静 南京大学盐城环境检测科技有限公司江苏 盐城 224002 
摘要:
建立了顶空-气相色谱法测定环境中不同基质水样中溴乙烷的方法,分别考察了顶空平衡温度、平衡时间、离子强度对溴乙烷富集的影响,从而确定最佳方法参数。结果表明,溴乙烷在0.10~10.0 μg/L范围内线性关系良好,相关系数(r)为0.999 0,检出限为0.012 μg/L,测定下限为0.048 μg/L,加标回收率为86.7%~104.7%,相对标准偏差(RSD)为29%~4.8%。该方法准确度和精密度高、检出限低,能够满足环境中不同基质水样中溴乙烷的检测要求。
关键词:  顶空-气相色谱  溴乙烷  电子捕获检测器
DOI:
分类号:X832;O657.7+1
文献标识码:B
基金项目:
Headspace Gas Chromatography for the Determination of Bromoethane in Water
ZHANG Yang-yang,LI Shuang,MENG Jing
Abstract:
An analytical method for the determination of bromoethane in different matrix water samples in the environment by headspace gas chromatography was established. The effects of headspace equilibrium temperature, equilibrium time and ion strength on bromoethane enrichment were investigated, and the optimal method parameters were determined. Samples were equilibrated by headspace, separated by capillary column, and detected by an electron capture detector, bromoethane showed a good linear relationship in the range of 0.10 ~ 10.0 μg/L. Correlation coefficient was 0.999 0. The detection limit was 0.012 μg/L, and the limit of quantitation is 0.048 μg/L. The spiked recovery was in the range of 86.7% ~ 104.7%, and the RSD ranged from 2.9%~4.8%. The method exhibited high accuracy and precision and low detection limit, which can meet the detection requirements of bromoethane in water samples of different substrates in the environment.
Key words:  Headspace gas chromatography  Bromoethane  Electron capture detector