| 标题 |
 Determination of Glyphosate and Aminomethylphosphonic Acid Residues in Water by Gas Chromatography with Tandem Mass Spectrometry after Exchange Ion Resin Purification and Derivatization. Application on Vegetable Matrixes 离子交换树脂纯化衍生后气相色谱串联质谱法测定水中草甘膦和氨甲基膦酸的残留量。在蔬菜基质中的应用
相关领域
氨基甲基膦酸
化学
色谱法
衍生化
气相色谱法
质谱法
草甘膦
检出限
离子色谱法
气相色谱/串联质谱法
串联质谱法
代谢物
生物化学
农学
生物
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AbstractClick to copy section link An analytical method for the determination of glyphosate and its principal metabolite, aminomethylphosphonic acid (AMPA), in water of different hardnesses (5, 20, and 30 °DH, french hardness) has been developed. Samples were fortified at different levels (0.05, 0.1, 1, and 5 μg/L) and were purified by column chromatography on ion-exchange resins. After derivatization with TFAA/HFB mixture, the derivatives were quantified by using capillary gas chromatography with an ion-trap tandem mass spectrometric detector. Analytical conditions for MS/MS detection were optimized, and the quantification was carried out on the sum of areas of the three most representative ions: m/z 283, 223, and 181 for AMPA and m/z 440, 321, and 261 for glyphosate. The limit of quantification was demonstrated to be at 0.05 μg/L for each compound. The mean recovery value and the relative standard deviation (n = 65) were 93 and 12% for AMPA and 95 and 13% for glyphosate. |
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