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1.中国水产科学研究院南海水产研究所,农业农村部渔业环境及水产品质量检验测试中心(广州),广东 广州 510300
2.三亚热带水产研究院,海南 三亚 572025
3.广州市农业农村科学院,广东 广州 510300
4.广东省渔业生态环境重点实验室,广东 广州 510300
黄 珂,研究员,研究方向:水产品质量安全检测与风险评估,E-mail:xiamike@163.com
收稿日期:2024-06-28,
修回日期:2024-08-29,
录用日期:2024-10-17,
纸质出版日期:2025-03-15
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王旭峰,王强,侯超苹,杨金兰,黎智广,张英侠,李惠青,黄珂.液相色谱-串联质谱法手性拆分和测定水产品中奥沙西泮和替马西泮对映体[J].分析测试学报,2025,44(03):479-485.
WANG Xu-feng,WANG Qiang,HOU Chao-ping,YANG Jin-lan,LI Zhi-guang,ZHANG Ying-xia,LI Hui-qing,HUANG Ke.Enantiomeric Separation and Determination of the Enantiomers of Oxazepam and Temazepam in Aquaculture Products by Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(03):479-485.
王旭峰,王强,侯超苹,杨金兰,黎智广,张英侠,李惠青,黄珂.液相色谱-串联质谱法手性拆分和测定水产品中奥沙西泮和替马西泮对映体[J].分析测试学报,2025,44(03):479-485. DOI: 10.12452/j.fxcsxb.240628178.
WANG Xu-feng,WANG Qiang,HOU Chao-ping,YANG Jin-lan,LI Zhi-guang,ZHANG Ying-xia,LI Hui-qing,HUANG Ke.Enantiomeric Separation and Determination of the Enantiomers of Oxazepam and Temazepam in Aquaculture Products by Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(03):479-485. DOI: 10.12452/j.fxcsxb.240628178.
建立了液相色谱-串联质谱(LC-MS/MS)手性拆分和测定水产品中奥沙西泮和替马西泮对映体残留量的分析方法。样品经乙腈提取2次,40 ℃条件下氮气浓缩至近干,残渣加入2 mL 50%乙腈-水溶液溶解,采用分散固相萃取净化,LC-MS/MS测定。使用EnantioPAK
®
Y1-R(5 μm,150 mm×4.6 mm)手性色谱柱,乙腈和0.1%甲酸-5 mmol/L乙酸铵溶液作为流动相,采用等度洗脱方式实现奥沙西泮和替马西泮手性对映体的拆分。目标对映体采用电喷雾正离子(ESI
+
)模式电离,多反应监测(MRM)模式下,内标法测定。目标对映体在0.5~50 μg/L质量浓度范围内线性关系良好,相关系数(
r
2
)均不低于0.999 0。水产品中对映体的检出限和定量下限分别为0.2 μg/kg和0.5 μg/kg。在5种空白基质中添加低、中、高浓度水平的目标对映体,样品平均加标回收率为82.6%~107%,相对标准偏差(RSD,
n=
6)为1.6%~9.2%。该方法灵敏可靠、适用性强,可用于不同水产品中奥沙西泮和替马西泮对映体的分析。
An analytical method was proposed for the enantiomeric separation and residual determination of the enantiomers of oxazepam and temazepam in aquaculture products by liquid chromatography-tandem mass spectrometry(LC-MS/MS). Samples were extracted twice with acetonitrile and the centrifuged extractions were blew to dryness under nitrogen gas at 40 ℃. Then,the dried residues were dissolved with 2 mL 50% acetonitrile-
water solution,followed by dispersive solid phase extraction(dSPE) cleanup protocol prior to be injected into LC-MS/MS. The chromatographic separation of the targeted enantiomers of oxazepam and temazepam were conducted on an EnantioPAK
®
Y1-R column(5 μm,150 mm×4.6 mm) under isocratic elution procedure,utilizing acetonitrile and 0.1% formic acid-5 mmol/L ammonium acetate solution as mobile phases. The targeted enantiomers were determined with internal standard method,operating in positive electrospray ionization scanning mode(ESI
+
) and multiple reaction monitoring(MRM) mode. Excellent linearity for four targeted enantiomers were prepared in the concentration ranges of 0.5-50 μg/L,with correlation coefficients(
r
2
) not less than 0.999 0. The limits of detection(LODs) and the limits of quantitation(LOQs) in aquaculture product samples were 0.2 μg/kg and 0.5 μg/kg,respectively. The average recoveries of targeted enantiomers fortified in five negative sample matrixes at three spiked concentration levels ranged from 82.6% to 107%,with relative standard deviations(RSDs,
n=
6) not more than 9.2%. The newly developed method is sensitive and reliable,and is suitable for the residue analysis of the enantiomers of oxazepam and temazepam in various aquaculture product matrixes.
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