天津科技

天津科技 ›› 2023, Vol. 50 ›› Issue (7): 87-90.

• 应用技术 • 上一篇    下一篇

固相萃取-气相色谱法测定水中硝基苯类化合物

刘佳   

  1. 天津泰达津联自来水有限公司 天津 300457
  • 收稿日期:2023-07-03 出版日期:2023-07-25 发布日期:2023-12-28

Determination of Nitrobenzene Compounds in Water by Solid-phase Extraction and Gas Chromatography

LIU Jia   

  1. Tianjin TEDA Tsinlien Water Supply Co.,Ltd.,Tianjin 300457,China
  • Received:2023-07-03 Online:2023-07-25 Published:2023-12-28

摘要： 建立了固相萃取-气相色谱法测定地表水和地下水中硝基苯类化合物的检测方法,并介绍了采用固相萃取提取净化样品、气相色谱仪电子捕获检测器检测水中15种硝基苯类化合物的各项仪器参数及样品提取的具体方法。该方法分离度及精准度良好,所有物质的标准曲线相关性系数均大于0.998,测定下限范围在0.005 5~0.097μg/L之间,准确度即加标回收率范围在78.3%~115%之间,精密度即加标回收率的相对标准偏差范围在1.3%~9.0%之间。

关键词: 固相萃取, 气相色谱法, 硝基苯类化合物

Abstract: A method for the determination of nitrobenzene compounds in surface water and groundwater by solid-phase extraction and gas chromatography is established. This paper introduces the various instrument parameters and specific sample extraction methods of using solid-phase extraction to purify samples,gas chromatograph electron capture detector to detect 15 nitrobenzene compounds in water. This method has good separation and accuracy. The correlation coefficients of standard curves for all substances are greater than 0.998,the lower limit of determination is between 0.005 5 μg/L and 0.097 μg/L,the accuracy,i.e. the spiked recovery rate is between 78.3% and 115%,and the precision,i.e. the relative standard deviation of the spiked recovery rate is between 1.3% and 9.0%.

Key words: solid-phase extraction, gas chromatography, nitrobenzene compounds

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