使用固相萃取盘和气相色谱 - 质谱联用技术半自动测定水中的农药。

Semiautomated determination of pesticides in water using solid phase extraction disks and gas chromatography-mass spectrometry.

作者信息

Leandro Cristiana C, Bishop Dawn A, Fussell Richard J, Smith Frankie D, Keely Brendan J

机构信息

Central Science Laboratory, Sand Hutton, York, YO41 1LZ, United Kingdom.

出版信息

J Agric Food Chem. 2006 Feb 8;54(3):645-9. doi: 10.1021/jf051874d.

DOI:10.1021/jf051874d

PMID:16448162

Abstract

A method based on semiautomated solid phase extraction using octadecyl-bonded silica disks and gas chromatography-mass spectrometry, operated in selected ion monitoring mode, allows detection and quantification of approximately 100 pesticides and transformation products in drinking water. Samples (500 mL) were passed through the disk, and the retained pesticides were eluted with acetone and ethyl acetate. Typical recoveries for pesticides at 0.1 microg L(-1) in water were in the range of 72-120% with relative standard deviations less than 20%. Calibration curves were linear over the range of 0.025-0.5 microg mL(-1) (equivalent to a concentration range in drinking water of 0.05-1.0 microg L(-1)).

摘要

一种基于使用十八烷基键合硅胶盘的半自动固相萃取和气相色谱-质谱联用的方法，在选择离子监测模式下运行，可对饮用水中约100种农药及其转化产物进行检测和定量。将样品（500 mL）通过圆盘，保留的农药用丙酮和乙酸乙酯洗脱。水中0.1 μg L⁻¹农药的典型回收率在72%至120%之间，相对标准偏差小于20%。校准曲线在0.025 - 0.5 μg mL⁻¹范围内呈线性（相当于饮用水中浓度范围为0.05 - 1.0 μg L⁻¹）。