PMID- 34213140 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210702 IS - 1872-2059 (Electronic) IS - 1000-8713 (Linking) VI - 37 IP - 12 DP - 2019 Dec 8 TI - [Determination of diethyl aminoethyl hexanoate residues in apples by gas chromatography-mass spectrometry combined with improved QuEChERS]. PG - 1363-1367 LID - 10.3724/SP.J.1123.2019.08021 [doi] AB - 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. FAU - Kong, Xiangji AU - Kong X AD - Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China. FAU - Kong, Shun AU - Kong S AD - School of Civil Engineering, Southeast University, Nanjing 211189, China. FAU - Zhang, Xuemei AU - Zhang X AD - Jiangsu Institute of Metrology, Nanjing 210023, China. FAU - Kong, Deyang AU - Kong D AD - Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China. LA - chi PT - English Abstract PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 SB - IM OTO - NOTNLM OT - QuEChERS OT - apple OT - diethyl aminoethyl hexanoate (DA-6) OT - gas chromatography-mass spectrometry (GC-MS) EDAT- 2019/12/08 00:00 MHDA- 2019/12/08 00:01 CRDT- 2021/07/02 09:12 PHST- 2021/07/02 09:12 [entrez] PHST- 2019/12/08 00:00 [pubmed] PHST- 2019/12/08 00:01 [medline] AID - 10.3724/SP.J.1123.2019.08021 [doi] PST - ppublish SO - Se Pu. 2019 Dec 8;37(12):1363-1367. doi: 10.3724/SP.J.1123.2019.08021.