摘要
利用气相色谱–三重四级杆质谱(GC-MS/MS)技术,实现了对地表水中32种农药残留量的定性定量分析。实验通过对前处理优化,建立一次性提取出32种农残的方法;对目标化合物的质谱参数优化,筛选出多种定性离子进行确证,确保结果的准确性;引入环氧七氯B内标法消除了仪器离子化效率的不稳定影响;用配制基质标曲避免了基质效应对农残检测造成干扰。实验结果表明,待测农残在线性范围(10~600μg/L)内呈现良好的线性关系,线性系数≥0.995,检出限为0.04~0.08μg/L,定量限为0.2μg/L,加标回收率为73.9%~108.8%。该方法具有前处理简单、仪器灵敏度高、选择性好的优点,适用于地表水中多种农药残留的日常定量分析。
The qualitative and quantitative determination of 32 pesticide residues in surface water was established by gas chromatography-triple quadrupole mass spectrometry(GC-MS/MS).In the experiment,32 kinds of pesticide residues were extracted at one time by optimizing the pre-treatment;and multiple qualitative ions were selected to ensure the accuracy of the results by optimizing the mass spectrometry parameters of the target compound;the unstable effect of ionization efficiency was eliminated by introducing internal standard of heptachlor B;the interference of matrix effect on pesticide residue detection was avoided by preparing standard curve of matrix.The results showed that the linear range(10~600μg/l)of the tested residues had good linear relationship:the linear coefficient was≥0.995,the detection limit was 0.04~0.08μg/L,the quantitative limit was 0.2μg/L,and the recoveries were 73.9%~108.8%.The method had the advantages of simple pretreatment,high instrument sensitivity and good selectivity,suitable for daily quantitative analysis of pesticide residues in surface water.
作者
赵悦
黄碧嘉
何秀琴
罗绮雯
ZHAO Yue;HUANG Bi-jia;HE Xiu-qin;LUO Qi-wen(Gongbei Customs Technology Center,Zhuhai,Guangdong 519000,China;Zhongshan Customs Technology Center,Zhongshan,Guangdong 528400,China)
出处
《粮油食品科技》
CAS
2022年第6期159-168,共10页
Science and Technology of Cereals,Oils and Foods
基金
中山市重大公益项目(2017B1029)
中山市社会公益与基础研究项目(2021SYP08)。
关键词
农药残留
地表水
气相色谱–三重四级杆质谱法
内标
基质效应
pesticide residues
surface water
gas chromatography-triple quadrupole mass spectrometry
internal standard
matrix effect
