建立了亚临界水萃取及气相色谱-串联质谱(GC-MS/MS)检测红茶中21种有机氯和拟除虫菊酯农药残留的方法.在萃取压力为5 MPa条件下,样品经150℃的亚临界水提取15 min后,将目标物转移至丙酮-正己烷(1:1,v/v)中,经ENVI-Carb固相萃取净化小柱净化,DB-5毛细管气相色谱柱分离,在多反应监测(MRM)模式下进行MS/MS检测,基质匹配溶液内标法定量.各目标物在5.0~ 320.0 μg/L范围内线性关系良好,相关系数均大于0.99,其定量限(信噪比(S/N)> l0)为50 ng/g,检出限(S/N>3)为10 ng/g.茶叶基质中添加50、100和200 ng/g的标准品时,21种农药的回收率为70.18% ~119.98%,相对标准偏差(RSD)为5.01% ~ 11.76%.该方法的灵敏度、准确度和精密度均符合农药残留测定的技术要求,适用于红茶中有机氯和拟除虫菊酯农药残留的检测.
参考文献
[1] | Sun Z J,Tang H,Chen D Z,et al.Acta Metrologica Sinica (孙正君,汤桦,陈大舟,等.计量学报),2010,31 (5A):121 |
[2] | GB 2763-2005 |
[3] | NY 5196-2002 |
[4] | NY 5244-2004 |
[5] | Zhao C S,Jiang J S,Zhao B,et al.China Standardization (赵成仕,蒋俊树,赵彬,等.中国标准化),2008(11):15 |
[6] | Ji J,Deng C H,Zhang H Q,et al.Talanta,2007,71:1068 |
[7] | Hu B Z,Song W H,Xie L P,et al.Chinese Journal of Chromatography(胡贝贞,宋伟华,谢丽萍,等.色谱),2008,26(1):22 |
[8] | Li J M,Zhong D B,Wang Y Q,et al.Chinese Journal of Chromatography(李军明,钟读波,王亚琴,等.色谱),2010,28(9):840 |
[9] | Li B,Zeng F G,Dong Q C,et al.Physics Procedia,2012,25:1776 |
[10] | Schurek J,Portoles T,Hajslova J.Anal Chim Acta,2008,611:163 |
[11] | Xu J,Chen J,Ye H Y,et al.Journal of Instrumental Analysis(徐娟,陈捷,叶弘毅,等.分析测试学报),2011,30 (9):990 |
[12] | Wu R M.Progress in Chemistry(吴仁铭.化学进展),2002,14(1):32 |
[13] | Jung N P,Abdelkader A N,Hee C W,et al.Chem Eng,2012,29:1 |
[14] | Kyoung A L,Kee T K,Seung Y N,et al.Food Sci Biotechnol,2011,20(2):543 |
[15] | Ndlela S C,Moura J M,Olson N K,et al.J Am Oil Chem Soc,2012,89(6):1145 |
[16] | Lagadec A J M,Miller D J,Lilka A V,et al.Environ Sci Technol,2000,34:1542 |
[17] | Wang L L,Wang Y,Yang H,et al.Journal of Analytical Science(王琳玲,王耀,杨海,等.分析科学学报),2009,25(1):90 |
[18] | Mi J B,Chen Q Y,Lin A Q,et al.Journal of Instrumental Analysis(宓捷波,陈其勇,林安清,等.分析测试学报),2011,30(4):386 |
[19] | Li B,Yang Y,Gan Y,et al.J Chromatogr A,2000,873:175 |
[20] | Ju Z Y,Howard L R.J Agric Food Chem,2003,51(18):5207 |
[21] | Pineriro Z,Palma M,Barroso C G.J Chromatogr A,2004,1026:19 |
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