第32卷,第3期2023年3月化学分析计量CHEMICALANALYSISANDMETERAGEVol.32,No.3Mar.2023顶空气相色谱法测定锂电池油性隔膜中N-甲基吡咯烷酮残留量蔡赛微,金迁,陈卿卿(浙江福立分析仪器股份有限公司,浙江温岭317500)摘要建立顶空气相色谱测定锂电池油性隔膜中的N-甲基吡咯烷酮残留量的方法。采用丙酮溶剂超声波辅助提取对样品进行萃取,萃取时间为10min,萃取液经滤膜过滤后,采用顶空气相色谱法氢火焰离子化检测器检测。N-甲基吡咯烷酮在2.06~616.80mg/kg范围内线性良好,相关系数大于0.9995,检出限为0.15mg/L,加标回收率为91.4%~106.1%。该法样品处理简便、快速,可作为锂电池油性隔膜中N-甲基吡咯烷酮残留的一种新检测方法。关键词锂电池;油性隔膜;N-甲基吡咯烷酮;气相色谱法中图分类号:O657.7文献标识码:A文章编号:1008-6145(2023)03-0071-04DeterminationofN-methylpyrrolidoneresiduesinoilyseparatorsoflithiumbatteriesbyheadspacegaschromatographyCAISaiwei,JINQian,CHENQingqing(ZhejiangFuliAnalyticalInstrumentCo.,Ltd.,Wenling317500,China)AbstractAmethodforthedeterminationofNMP(N-methylpyrrolidone)residuesinoilyseparatorsoflithiumbatteriesbyheadspacegaschromatography(HS-GC)wasestablished.Thesampleswereextractedbyultrasonic-assistedextractionwithacetonesolventfor10min.Aftertheextractwasfilteredthroughafiltermembrane,thehydrogenflameionizationdetectorwasusedforthedetectionbyheadspacegaschromatography.ThemethodhasagoodlinearityforthemassfractionofNMPintherangeof2.06-616.80mg/L,thecorrelationcoefficientwasgreaterthan0.9995,thedetectionlimitwas0.15mg/L,andtherecoveryratewas91.4%-106.1%.Thepretreatmentofthemethodissimpleandfast,whichcanbeusedasanewdetectionmethodforNMPresiduesintheoilyseparatoroflithiumbatteries.Keywordslithiumbattery;oilyseparator;N-methylpyrrolidone;gaschromatographyN-甲基吡咯烷酮(NMP)是一种选择性强和稳定性好的极性溶剂,能与水、醇、醚、酯、酮、卤代烃、芳烃互溶,对皮肤有轻度刺激作用[1-3]。NMP具有毒性低、沸点高、溶解力强、不易燃、可生物降解、可回收利用等特点,在锂电行业中广泛应用[4]。NMP作为锂电池油性隔膜[5-9]重要的辅助材料,近年来随着锂电池产业的迅速发展,使用量大大增加,同时也会对环境产生不良影响[1...