摘要
采用固相膜萃取-气相色谱法测定养殖用水中乐果、甲基对硫磷和马拉硫磷等3种有机磷农药的含量。水样经C18固相萃取膜萃取后，用丙酮和二氯甲烷洗脱。用SPB-608毛细管色谱柱分离，氮磷检测器检测。3种有机磷农药的质量浓度均在0．02～1．0μg·L^-1范围内与其峰面积呈线性关系，方法的检出限（3S／N）在0．0025-0．004μg·L-1之间。以空白样品为基体进行加标回收试验，回收率在93．0%～111％之间，测定值的相对标准偏差（n=5）在0．13‰～5．2％之间。
GC with solid phase disk extraction was applied to the determination of 3 organophosphorous pesticides,i. e. roxion,methyl parathion and malathion in aquaculture water. The water sample was extracted by C18 solid phase disk,and eluted with acetone and dichloromethane. The analytes were separated on a SPB-608 capillary column and detected by NPD. Linear relationships between values of peak area and the mass concentration of 3 organophosphorous pesticides were kept in the same range of 0. 02- 1. 0 μg·L- 1,with detection limits（ 3S/N） in the range of 0. 002 5- 0. 004 μg·L- 1.The recovery rates measured by standard addition method were in the range of 93. 0%- 111%,with RSD（ n = 5） in the range of 0. 13%- 5. 2%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2015年第6期770-774,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
浙江省科技计划项目(2012F30026
2013C37088)
2012年度省重大科技专项(2012C13005)
浙江省科技计划项目(2013F10065)
关键词
气相色谱法
固相膜萃取
有机磷农药
养殖用水
GC Solid phase disk extraction Organophosphorous pesticides Aquaculture water
