改进QuEChERS-气相色谱-质谱法测定苹果中胺鲜酯残留

以改进的QuEChERS前处理技术结合气相色谱-质谱（GC-MS）技术，建立了苹果中胺鲜酯残留的检测方法，为苹果中胺鲜酯残留限量的制定提供依据。采用温水作为提取溶剂，提取液经二氯甲烷反萃取，旋转蒸发浓缩、定容净化后，以HP-5MS毛细管柱进行分离，在电子轰击（EI）源、选择离子监测（SIM）模式下检测苹果中胺鲜酯。在3个添加水平下，胺鲜酯的回收率为74.1%~84.2%，相对标准偏差（RSD）为1.5%~4.1%，检出限和定量限分别为0.0024 mg/L和0.008 mg/kg。该方法用于苹果中胺鲜酯残留的检测，灵敏度高，实用性强。

Determination of diethyl aminoethyl hexanoate residues in apples by gas chromatography-mass spectrometry combined with improved QuEChERS

A method was developed for the determination of diethyl aminoethyl hexanoate (DA-6) residues in apples by gas chromatography-mass spectrometry (GC-MS) combined with improved QuEChERS. The samples were first extracted with warm water, then, the extract was subjected to liquid-liquid re-extraction with dichloromethane, followed by rotary evaporation concentration. The residues were cleaned up with primary secondary amine (PSA). The analytes were separated on an HP-5 capillary column and detected using an EI source in the SIM mode. The recoveries ranged from 74.1% to 84.2% at three spiked levels, with relative standard deviations (RSDs) between 1.5% and 4.1%. The limit of detection and limit of quantification were 0.0024 mg/kg and 0.008 mg/kg, respectively. The developed method is sensitive, and practically applicable for the determination of DA-6 residues in apple samples.