摘要
建立了一种基质固相分散萃取—气相色谱法测定土壤中8种有机氯农药含量的方法,优选了固相分散剂及其用量、洗脱溶剂以及土壤样品与分散剂的质量比。实验结果表明,在弗罗里硅土作为分散剂、正己烷和丙酮(体积比为1∶1)为洗脱溶剂、土壤样品与分散剂的质量比为1∶3的优化条件下,8种有机氯农药在50~250μg/kg范围内表现出良好的线性关系,相关系数大于0.99,加标回收率为60.3%~94.3%,相对标准偏差为6.83%~8.95%。实际土壤质控样测试结果显示,本方法的测试结果在标准值的不确定度范围内,可满足土壤中有机氯农药残留的检测分析。
A matrix solid phase dispersion-gas chromatograph method was established for determination of 8 kinds of organochlorine pesticides in soil.The solid phase dispersant and its dosage,elution solvent and the mass ratio of soil sample to dispersant were optimized.The experimental results show that under the optimum conditions of using florisil as dispersant,n-hexane and acetone(with 1:1 of volume ratio)as eluent solution,and the ratio of soil samples to dispersant being 1∶3,the linear range of each organochlorine pesticide is 50-250μg/kg with correlation coefficient greater than 0.99,their standard addition recoveries are 60.3%-94.3%,and their relative standard deviations are 6.83%-8.95%.Moreover,the determination results of the quality control samples reveal that the determination data are in the uncertainty range of standard value.The developed method can meet the requirements for determination of organochlorine pesticide residues in soil.
作者
严朝朝
魏文婉
伍佳慧
牛禾
林惠文
余彬彬
YAN Zhaochao;WEI Wenwan;WU Jiahui;NIU He;LIN Huiwen;YU Binbin(School of Pharmaceutical and Materials Engineering,Taizhou University,Taizhou 318000,China;Taizhou Environmental Monitoring Center,Taizhou 318000,China;Zhejiang Hongchao Environmental Testing Co.Ltd.,Taizhou 317000,China)
出处
《化工环保》
CAS
CSCD
北大核心
2021年第2期235-240,共6页
Environmental Protection of Chemical Industry
基金
国家大学生创新创业训练计划项目(201910350011)
台州市科技计划项目(1902ky81)。
关键词
有机氯农药
基质固相分散萃取
气相色谱法
固相分散剂
土壤
organochlorine pesticide
matrix solid phase dispersion
gas chromatography
solid phase dispersant
soil
analysis and detection
