摘要
采用分散固相萃取（Qu ECh ERS）前处理方法结合气相色谱-质谱法（GC-MS）建立出口蔬菜中16种保鲜剂残留量的快速检测方法。以叶菜类、茄果类、豆类、瓜类和块茎类出口蔬菜为原料,样品经乙腈提取,Qu ECh ERS除杂净化,用GC-MS外标法进行定量分析。16种保鲜剂在0.02～2.0 mg/L范围内线性关系良好,相关系数为0.9990～0.9997,检出限（LOD,S/N=3）在0.004～0.965μg/kg范围内。以0.01,0.02和1.0 mg/kg添加浓度水平进行方法学验证,回收率为76.7%～120.0%,相对标准偏差为2.1%～10.6%。与国标GB/T 19648-2006等方法相比,本方法具有快速、简便、灵敏度高等特点,能满足出口蔬菜中16种保鲜剂残留的检测要求。
A rapid detection method of 16 preservative residues in vegetables for export was developed by gas chromatography-mass spectrometry（ GC-MS） after pre-treatment method of dispersive solid phase extraction（ SPE）. Samples including leafy,eggplant fruit,bean,melon and tuber vegetables were extracted with acetonitrile and detected by GC / MS with external standard method after being cleaned up with dispersive SPE.The results showed that the method had a good linearity over concentration range of 0. 02- 2. 0 mg / L preservatives with correlation coefficients of 0. 9990- 0. 9997. The limits of detection（ LODs） were in the range of 0. 004- 0. 965 μg / kg. The recoveries of the preservatives were in the range of 76. 7%- 120. 0% at the spiked levels of 0. 01,0. 02 and 1. 00 mg / kg,and the relative standard deviations（ RSDs） were in the range of 2. 1%- 10. 6%. Compared with the GB / T 19648-2006,etc,the method is rapid,simple,highly sensitive,and can meet testing requirements of 16 preservative residues in vegetables for export.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2015年第1期87-92,共6页
Chinese Journal of Analytical Chemistry
基金
重庆市科委食品农产品科研基金(No.cstc2013yykf B0165)项目资助
关键词
分散固相萃取
出口蔬菜
保鲜剂
气相色谱-质谱法
Dispersive solid phase extraction
Vegetables
Preservative
Gas chromatography-mass spectrometry
