应用化学 ›› 2022, Vol. 39 ›› Issue (3): 470-479.DOI: 10.19894/j.issn.1000-0518.210279

• 研究论文 • 上一篇    下一篇

固相萃取-同位素稀释-超高效液相色谱-串联质谱法测定水中涕灭威、涕灭威亚砜和涕灭威砜

孙慧婧(), 崔冬妮   

  1. 国家环境保护地表水环境有机污染物监测分析重点实验室,江苏省环境监测中心,南京 210019
  • 收稿日期:2021-06-09 接受日期:2021-09-02 出版日期:2022-03-01 发布日期:2022-03-15
  • 通讯作者: 孙慧婧
  • 基金资助:
    江苏省2019年环境监测科研基金(1909)

Determination of Aldicarb, Aldicarb Sulfoxide, Aldicarb Sulfone in Water by Solid Phase Extraction and UPLC⁃MS/MS with Isotope Dilution

Hui-Jing SUN(), Dong-Ni CUI   

  1. State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water,Jiangsu Provincial Environmental Monitoring Center,Nanjing 210019,China
  • Received:2021-06-09 Accepted:2021-09-02 Published:2022-03-01 Online:2022-03-15
  • Contact: Hui-Jing SUN
  • About author:516482697@qq.com
  • Supported by:
    Jiangsu Environmental Monitoring Research Fund Project 2019 (No.1909)

摘要:

采用同位素稀释结合固相萃取对水样进行预处理,建立了环境水体中涕灭威及其代谢物(涕灭威亚砜、涕灭威砜)的超高效液相色谱-串联质谱分析方法。水样加同位素内标涕灭威-D3、涕灭威亚砜-D3和涕灭威砜-D3,经HLB固相萃取柱富集净化后,用Waters ACQUITYTM BEH C18色谱柱(2.1 mm×100 mm,1.7 μm)分离,以0.1%甲酸+5 mmol/L乙酸铵水溶液-乙腈为流动相,在电喷雾离子源正离子模式下进行多反应监测(MRM),内标法定量。3种目标化合物在0.5~200 μg/L范围内线性良好,线性相关系数r≥0.999;方法检出限为0.0008~0.001 μg/L,3个加标浓度水平的平均回收率为94.5%~108%,相对标准偏差为2.7%~6.5%。该方法采用了稳定同位素内标参与前处理的方法,消除了涕灭威降解对测定结果的影响,准确度好、灵敏度高,可用于环境水体中涕灭威及其代谢物涕灭威亚砜、涕灭威砜的测定。

关键词: 涕灭威, 涕灭威亚砜, 涕灭威砜, 固相萃取, 转化率, 高效液相色谱-串联质谱法

Abstract:

A method for analysis of aldicarb, aldicarb sulfoxide and aldicarb sulfone in water was developed using solid phase extraction and HPLC-MS/MS with isotope dilution. The aqueous samples were spiked with isotope-labeled internal standards aldicarb-D3, aldicarb sulfoxide-D3 and aldicarb sulfone-D3, concentrated and purified on an HLB cartridge, and then separated on a Waters ACQUITY UPLCTM BEH C18 column by gradient elution with 0.1% formic acid-5 mmol/L ammonium acetate-acetonitrile as the mobile phase. The analytes were detected by positive electrospray ionization with multiple reaction monitoring (MRM). The internal standard method was used to determine the results. There is a good linearity for target compounds in the range of 0.5~200 μg/L with the correlation coefficient (r) larger than 0.999. The method detection limit (MDL) is 0.0008~0.001 μg/L. The average recoveries range between 94.5%~105% at three different spiked levels. The relative standard deviation (RSD) is between 2.7%~6.5%. The method is sensitive and accurate, and is suitable for determination of aldicarb, aldicarb sulfoxide, aldicarb sulfone in water.

Key words: Aldicarb, Aldicarb sulfoxide, Aldicarb sulfone, Solid phase extration, Conversion, High performance liquid chromatography-mass spectrometry

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