分散液相微萃取-气相色谱串联质谱法测定茶饮料中联苯菊酯

Determination of bifenthrin in tea drink by dispersive liquid-liquid microextraction coupled with gas chromatography-tandem mass spectrometry

中文关键词:  分散液相微萃取  气相色谱-串联质谱法  茶饮料  联苯菊酯

英文关键词:dispersive liquid-liquid microextraction  gas chromatography-tandem mass spectrometry  tea drink  bifenthrin

中文摘要:

      目的 建立分散液相微萃取(dispersive liquid-liquid microextraction, DLLME)-气相色谱串联质谱法(gas chromatography-tandem mass spectrometry, GC-MS/MS)测定茶饮料中联苯菊酯的分析方法。方法 样品经分散液相微萃取提取(60 μL氯苯为萃取剂, 0.8 mL乙腈为分散剂, 超声萃取0.5 min), 采用GC-MS/MS在多反应监测模式(multiple reaction monitoring, MRM)下分析, 外标法定量。结果 联苯菊酯在10~200 μg/L的浓度范围内线性关系良好, 相关系数(r2)大于0.99, 检出限(S/N=3)为0.0027 μg/L, 在0.5、1.0和2.5 μg/L 3个水平的添加浓度下, 回收率在92.5%~98.7%之间, 相对标准偏差小于5.7%(n=6)。结论 该方法操作简便快速、准确可靠、灵敏度高, 可用于茶饮料中联苯菊酯的检测。

英文摘要:

      Objective To develop a method for determination of bifenthrin in tea drink by dispersive liquid-liquid microextraction (DLLME) coupled with gas chromatography-tandem mass spectrometry(GC-MS/MS). Methods The tea drink samples were extracted by DLLME(60 μL chlorobenzene as the extraction solvent, 0.8 mL acetonitrile as the dispersive solvent, sonication for 0.5 min ). The treated samples were then subjected to GC-MS/MS using multiple reaction monitor (MRM) acquisition mode, and the external standard method was used for quantification. Results Bifenthrin had the good linear relationship in the range of 10-200 μg/L (r2>0.99). The limit of detection (S/N=3) of the method was 0.0027 μg/L. The recoveries at levels of 0.5, 1.0 and 2.5 μg/L were ranged from 92.5% to 98.7%. The relative standard deviations (RSDs) were less than 5.7% (n=6). Conclusion The established method is rapid, simple, sensitive, repeatable, and reliable for analysis of bifenthrin in tea drink.