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OALib Journal期刊
ISSN: 2333-9721
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反向微乳毛细管电泳法在线富集技术灵敏检测化妆品中的多环芳烃
DOI: 10.11895/j.issn.0253-3820.140841, PP. 81-86
Keywords: 微乳毛细管电泳,大体积进样,pH动态连接,扫集,多环芳烃(PAHs)
Abstract:
要建立了反向微乳毛细管电泳(MEEKC)在线富集技术灵敏检测多环芳烃的方法.采用大体积进样-pH动态连接-扫集微乳毛细管电泳法(LVSS-DypH-MEEKC)对于常规条件下很难分离的6种强亲脂性的多环芳烃中性分子进行富集分离.结果表明,在反相电压下,当微乳液的组成为:2.4%(w/w)SDS、0.6%(w/w)正辛烷、6.6%(w/w)正丁醇、20mmol/LNaH2PO4缓冲液(pH2.2);进HCB时间为20s(16kPa),进样时间为80s(16kPa)时,富集效果良好,富集倍数在25-80倍之间,在27min内实现了对多环芳烃化合物的灵敏检测.将本方法用于化妆品中多环芳烃的检测,回收率在90.6%-95.9%之间,相对标准偏差均小于5.1%(n=5).
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