气相色谱法同时测定水中硝基苯类化合物与有机氯农药
Simultaneous Determination of Nitrobenzene Compounds and Organochlorine Pesticides in Water by Gas Chromatography
韩军文 1田慧 2孙晓晖2
作者信息
- 1. 江苏省泰州环境监测中心,江苏泰州 225300;江苏省环境保护土壤有机物监测重点实验室,江苏泰州 225300
- 2. 江苏省泰州环境监测中心,江苏泰州 225300
- 折叠
摘要
建立了一种液液萃取-气相色谱同时测定水中10种硝基苯类化合物与8种有机氯农药的方法.对比了不同萃取溶剂、萃取体积和萃取时间对回收率的影响,最终确定以10.0 mL甲苯为萃取溶剂,萃取5 min后定容至20.0 mL.净化方式确定使用硅胶小柱净化,回收率均在80％以上.目标化合物检出限为0.035～0.45 μg/L,测定下限为0.14～1.78 μg/L.分别测定低、中、高三种不同浓度的加标水样,重复测定6次,相对标准偏差范围为1.7％～10.6％,加标回收率范围为80.6％～110％,均能满足实验室质控要求.该方法简单快捷,耗时短,精密度和检出险也较为理想,可以同时测定水中的10种硝基苯类化合物与8种有机氯农药.
Abstract
A method for the simultaneous determination of 10 nitrobenzenes and 8 organochlorine pesticides in water by liquid-liquid extraction and gas chromatography was established.The effects of different extraction solvents,extraction volume and extraction time on the recovery rate were compared.Finally,10.0 mL toluene was determined as the extraction solvent,and the volume was fixed to 20.0 mL after 5 minutes of extraction.The purification method is determined to use silica gel column for purification,and the recovery rate is above 80％.The detection limit of the target compound is 0.035～0.45 µg/L,and the lower limit of determination is 0.14～1.78 μg/L.The spiked water samples of low,medium and high concentrations were determined respectively,and the determination was repeated for 6 times.The relative standard deviation range was 1.7％～10.6％,and the spiked recovery range was 80.6％～110％,which could meet the laboratory quality control requirements.The method is simple,fast,time-consuming,and has ideal precision and detection risk.It can simultaneously determine 10 nitrobenzenes and 8 organochlorine pesticides in water.
关键词
硝基苯类化合物/有机氯农药/液液萃取/气相色谱法Key words
nitrobenzene compounds/organochlorine pesticides/liquid-liquid extraction/gas chromatography引用本文复制引用
出版年
2024
NETL
NSTL
万方数据