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吹扫捕集/气相色谱-质谱法测定水中痕量全氟碘烷类化合物
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作者单位
朱帅,贾静,饶竹 国家地质实验测试中心国土资源部生态地球化学重点实验室 
基金项目:国家自然科学基金( 21607033);中国地质科学院基本科研业务费专项经费(CSJ201603)
中文摘要:利用吹扫捕集/气相色谱-质谱联用技术,建立了一种同时测定水中9种全氟碘烷类化合物的新方法,并对捕集管的型号、吹扫温度、吹扫时间、解吸时间及盐效应等样品吹扫条件进行了优化。在最佳实验条件下,9种全氟碘烷类化合物在0.1~100 μg·L-1范围内线性关系良好,相关系数(r2)不小于 0.996,方法检出限为5.6~15 ng·L-1,定量下限为17~36 ng·L-1。在高、中、低3个加标水平下,9种全氟碘烷类化合物的回收率为75.7%~118%,相对标准偏差为2.2%~8.3%。将建立的方法用于某典型污染区域环境水样的分析,检出9种全氟碘烷类化合物,质量浓度为21.3~469 ng·L-1。
中文关键词:全氟碘烷类化合物  吹扫捕集  气相色谱-质谱(GC-MS)  
 
Determination on Trace of Polyfluorinated Iodine Alkanes in Water Using Purge and Trap/Gas Chromatography-Mass Spectrometry
Abstract:A novel gas chromatography-mass spectrometric(GC-MS) method coupled with purge and trap was developed for the simultaneous determination of nine neutral volatile polyfluorinated iodine alkanes(PFIs) in water samples.Several P&T parameters such as type of traps,purge time,purge temperature,desorbing time and ionic strength were optimized.Under the optimal conditons,the calibration curves for the nine PFIs showed good linear relationships(r2≥0.996) in the concentration range of 0.1-100 μg·L-1.The limits of detection(LOD) ranged from 5.6 ng·L-1 to 15 ng·L-1,and the limits of quantitation were from 17 ng·L-1 to 36 ng·L-1.The spiked recoveries for the analytes in water samples were in the range of 75.7%-118% with relative standard deviations(RSDs,n=7) of 2.2%-83%.The method was applied in the detection of volatile PFIs in water samples from the vicinity of a fluorochemical manufacturing plant,and nine PFIs were detected,with concentrations of 21.3-469 ng·L-1.
Key Words:polyfluorinated iodine alkanes  purge and trap  gas chromatography-mass spectrometry(GC-MS)  water
引用本文:朱帅,贾静,饶竹.吹扫捕集/气相色谱-质谱法测定水中痕量全氟碘烷类化合物[J].分析测试学报,2018,37(11):1359-1364.
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