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分析化学  2014 

温控离子液体分散液液微萃取结合高效液相色谱法检测脐橙中染色剂残留

DOI: 10.11895/j.issn.0253-3820.140200, PP. 1434-1440

Keywords: QuEChERS,分散液液微萃取,离子液体,高效液相色谱,染色剂

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Abstract:

建立了QuEChERS-温控离子液体分散液液微萃取结合高效液相色谱法快速检测脐橙中5种染色剂残留的分析方法。QuEChERS前处理步骤:样品用乙腈快速提取,NaCl和无水MgSO4除水后,经N-丙基乙二胺净化。温控离子液体分散液液微萃取步骤:QuEChERS前处理的净化液(1mL)为分散剂,1-辛基-3-甲基咪唑六氟磷酸盐离子液体(60μL)为萃取剂,55℃水浴12min,将目标物富集。用高效液相色谱-紫外检测器分析,检出样品用超高效液相色谱-串联质谱确证。在0.01和0.05mg/kg的添加水平下,5种染色剂的平均回收率为70.3%~93.6%,相对标准偏差为3.5%~9.2%,定量限为1.1~2.8μg/kg。

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