PMID- 19803132 OWN - NLM STAT- MEDLINE DCOM- 20101005 LR - 20161018 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 27 IP - 3 DP - 2009 May TI - [Determination of hormone multi-residues in animal tissues by gas chromatography-mass spectrometry]. PG - 294-8 AB - A method of gas chromatography-mass spectrometry (GC-MS) for the simultaneous determination of nine sex hormone residues, such as hexestrol, diethylstilbestrol, dienestrol, etiocholan-3alpha-ol-17-one, epitestosterone, estrone, estradiol, ethinylestradiol and estriol, in animal tissues was developed. The sex hormones were extracted with acetonitrile, then cleaned-up with a C18 solid-phase extraction (SPE) column. The microwave-assisted derivatization of the target components with N,O-bis( trimethylsilyl) trifluoroacetamide (BSTFA) and trimethylchlorosilane (TMCS) (99:1, v/v) using pyridine as solvent was performed, and then the derivatives were analyzed by GC-MS. The limits of detection were 0.1-1 microg/kg for all hormones, and the limits of quantification were 0.2-2 microg/kg. The average recoveries of sex hormones were 68.8%-93.1%. The relative standard deviations (RSDs) of inter- and intra-assay were 4.1%-22.3% and 3.1%-17.9%, respectively. The real sample tests showed this method can be used for the sensitive and accurate determination of multi-sex hormones residues in biological samples. FAU - Lin, Weixuan AU - Lin W AD - Liaoning Entry-Exit Inspection and Quarantine Bureau, Dalian 116001, China. dlciqlwx@sina.com.cn FAU - Dong, Weifeng AU - Dong W FAU - Chen, Xi AU - Chen X FAU - Tian, Miao AU - Tian M FAU - Yu, Ling AU - Yu L FAU - Zhao, Jinghong AU - Zhao J FAU - Yang, Chunguang AU - Yang C LA - chi PT - English Abstract PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Gonadal Steroid Hormones) RN - 10BI795R7D (Hexestrol) RN - 481-30-1 (Epitestosterone) RN - 4TI98Z838E (Estradiol) SB - IM MH - Animals MH - Drug Residues/*analysis MH - Epitestosterone/analysis MH - Estradiol/analysis MH - Food Contamination/analysis MH - Gas Chromatography-Mass Spectrometry/*methods MH - Gonadal Steroid Hormones/*analysis MH - Hexestrol/analysis MH - Meat Products/*analysis MH - Swine EDAT- 2009/10/07 06:00 MHDA- 2010/10/06 06:00 CRDT- 2009/10/07 06:00 PHST- 2009/10/07 06:00 [entrez] PHST- 2009/10/07 06:00 [pubmed] PHST- 2010/10/06 06:00 [medline] PST - ppublish SO - Se Pu. 2009 May;27(3):294-8.