摘要
利用100μmPDMS(聚二甲基硅氧烷)涂层,建立了非平衡固相微萃取＿气相色谱＿质谱联用测定水中甲拌磷的新方法。在萃取效果确证的基础上,对溶液体积、萃取时间、搅拌速度和溶液离子强度等实验条件进行了优化。方法的线性范围为0 005～50μg/L,相关系数为0 997,检测限(信噪比3∶1)为0 002μg/L,对于0 1μg/L的甲拌磷相对标准偏差(n=6)为7 16%。所建立的方法直接用于田间表面水和河水样品中甲拌磷的测定,结果满意。
A Solid_phase Microextraction(SPME) method for the determination of pesticide phorate in natural water has been developed in this papet. Phorate is extracted by 100μm Polydimethylsiloxane coating and determined by Gas_chromatograph(GC)_mass spectrometry. The analytical conditions such as solution volume, extraction time, stirring speed and ion strength are optimized. Under the optimum a-nalytical conditions, the linearity for phorate is 0.005～50.00μg/L with the correlation coefficient r=0.997, and the detection limit of 0.002μg/L(S/N=3). The relative standard deviation(RSD) is 7.16%(n=6) for 0.1μg/L phorate. The proposed method has been applied to the determination of phorate in water of field surface and river with satisfactory results.
出处
《中国环境监测》
CAS
CSCD
北大核心
2004年第2期21-24,共4页
Environmental Monitoring in China
关键词
非平衡固相微萃取
气相色谱-质谱
杀虫剂
甲拌磷
nonequilibrium solid-phase microextraction
gas-chromatograph-mass spectrometry
pesticide
phorate
