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利用液液—萃取和气相色谱 / 质谱法测定水样中的四乙基铅

Determination of tetraethyl lead in water samples by liquid-liquid extraction and gas chromatography / mass spectrometry

Modern Analytical Chemistry Research / 2020,2(1): 22-28 / 2020-04-29 2352 4035

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• Authors: 何定文      毛利*     
• Information:

  武汉生物工程学院，武汉

• Keywords: 液液—萃取；气相色谱 / 质谱；四乙基铅；地表水
• liquid-liquid extraction; Gas chromatography/mass spectrometry; Tetraethyl lead; surface water
• Abstract: A method for the determination of tetraethyl lead in water by liquid － liquid extraction coupled with gas chromatography /mass spectrometry ( GC/MS) was established. Extraction solvent was optimized，The result showed that，CH2Cl2 was selected as extraction solvent，the amount of sodium chloride added was 10 g. Under the optimum conditions，the limit of detection was 0.03 μg /L，the calibration graph was linear in the range of 0.20~10.0 μg /L， with the correlation coefficients of 0.9999. The recoveries of the method were 89.5%~101.7%，and the relative standard deviations ranged from 3.7%~5.9% 。
• 采用液液微萃取与气相色谱 / 质谱法联用技术建立了测定水样中四乙 基铅的方法。同时还对萃取溶剂进行选择，结果表明：选择了二氯甲烷作为萃 取溶剂，氯化钠加入量 10 g，该方法检出限为 0.03 μg/L，线性范围为 0.20～10.0 μg/L，线性相关系数为 0.9999，测定饮用水源水和地表水中的四乙基铅，加标 回收率为 89.5% ～ 101.7% ，相对标准偏差为 3.7% ～ 5.9% 。
• DOI: https://doi.org/10.35534/macr.0201004c
• Cite: 何定文，毛利．利用液液—萃取和气相色谱 / 质谱法测定水样中的四乙基铅［J］．现代分析化学研究，2020，2（1）：22-28．