Rapid and simultaneous analysis of dichlorvos, malathion, carbaryl, and 2,4-dichlorophenoxy acetic acid in citrus fruit by flow-injection ion spray ionization tandem mass spectrometry

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• 作者：Nakazawa ; Hiroyuki ; Takahashi ; Nobuyuki ; Inoue ; Koichi ; Ito ; Yuko ; Goto ; Tomomi ; Kato ; Kayoko ; et. al.
• 关键词：Dichlorvos (DDVP) ; Malathion ; Carbaryl ; 2 ; 4-Dichlorophenoxy acetic acid (2 ; 4-D) ; Tandem mass spectrometry ; Flow-injection analysis
• 刊名：Talanta
• 出版年：2004
• 期刊代码：106_00399140
• 类别：ch
• 出版时间：November 15, 2004
• 卷：64
• 期：4
• 页码：899-905
• 文件大小：416 K

摘要

A simple method for the rapid and simultaneous analysis of dichlorvos (DDVP), malathion, carbaryl, and 2,4-dichlorophenoxy acetic acid (2,4-D) in citrus fruit, which uses flow-injection ion spray ionization tandem mass spectrometry, has been developed for the first time. The method involves the combined use of stable isotopically labeled internal standards (DDVP-d₆, malathion-d₁₀, carbaryl-d₇, and 2,4-D-d₅) and a multiple reaction monitoring technique. The average recoveries for the pesticides at the same concentrations as their tolerance levels (DDVP: 0.1–0.2μgg⁻¹; malathion: 0.5–4.0μgg⁻¹; carbaryl: 1.0μgg⁻¹; 2,4-D: 1.0–2.0μgg⁻¹) ranged from 90 to 119%with the relative standard deviation (R.S.D.) ranging from 1.0 to 13.1%(n = 5). Analysis time, including sample preparation and determination, was only 15min. The present method is effective for screening DDVP, malathion, carbaryl, and 2,4-D in citrus fruit.