摘要
建立了同时测定大气中毒死蜱、哒螨灵、甲氰菊酯和功夫菊酯的快速分析方法。采用大流量PUF捕集法采集大气样品,以正己烷作为提取溶剂,采用索氏提取、气相色谱-电子俘获检测法测定样品中目标污染物浓度,外标法定量。4种农药的线性范围在0.05～1 mg.L-1之间,相关系数均大于0.999;大气样品中4种农药的平均回收率在80.94%～112.43%之间,相对标准偏差(变异系数)为0.97%～8.58%;大气中毒死蜱、哒螨灵、甲氰菊酯和功夫菊酯的最低检出限分别为0.016 7、0.028 7、0.045 6和0.016 2 mg.m-3。该检测方法可用于农药厂周边大气中农药污染物浓度的测定。
To determine residues of chlorpyrifos, pyridaben, fenpropathrin, and cyhalothrin in the atmosphere simultane- ously, a gas chromatography（GC） method was developed. Air samples were collected using a high-volume PUF sampler and extracted with the technique of Soxhlet extraction using hexane. Concentrations of target pesticides in the samples were determined by gas chromatography-electron capture detection, and quantified with the external standard method. The linear range of the four pesticides was 50-1 000 ng · mL^-1 （ r 〉0. 999）. The mean recovery rates of the four pesticides in the air samples varied in the range of 80. 94% - 112.43% and relative standard deviation （RSD） of the determination was in the range of 0.97% -8.58%. The limit of detection is 0.016 7, 0.028 7, 0.045 6, and 0.016 2 mg· m-3 respectively for chlorpyrifos, pyridaben, fenpropathrin and cyhalothrin. This method is applicable to determination of concentrations of pesticides in the surrounding atmosphere of pesticide factory.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2013年第1期122-127,共6页
Journal of Ecology and Rural Environment
基金
全国重点地区环境与健康调查
