Determination of clethodim and its oxidation metabolites in crops by liquid chromatography with confirmation by LC/MS.
Determination of clethodim and its oxidation metabolites in crops by liquid chromatography with confirmation by LC/MS.
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DOI：
10.1093/jaoac/84.4.1172
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发表时间：
2001-07
影响因子：
1.6
通讯作者：
S. Ishimitsu;A. Kaihara;K. Yoshii;Y. Tsumura;Y. Nakamura;Y. Tonogai
中科院分区：
文献类型：
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作者：
S. Ishimitsu;A. Kaihara;K. Yoshii;Y. Tsumura;Y. Nakamura;Y. Tonogai
建立了农产品中除草剂烯草酮（C 0）及其氧化代谢物烯草酮亚砜（C1）和烯草酮砜（C2）的测定方法。萃取后，C 0和C1均被间氯过氧苯甲酸氧化为C2，并通过液相色谱法（LC）测定C2。通过液相色谱/质谱法（LC/MS）和电喷雾电离（ESI）确认C2峰。在0.05-1.0 ppm强化后，萝卜、番茄、洋葱、甘薯、菜豆、胡萝卜、卷心菜和生菜的C 0回收率范围为91 - 118%。农作物中C_2的检出限为0.01ppm（S/N > 3）。对洋葱、甘薯、四季豆、胡萝卜的强化样品进行了LC/MS（ESI）确证，并检测到C2峰。
A method was developed for determination of the herbicide clethodim (C0) and its oxidation metabolites clethodim sulfoxide (C1) and clethodim sulfone (C2) in agricultural products. Upon extraction, both C0 and C1 were oxidized to C2 by m-chloroperoxybenzoic acid, and C2 was determined by liquid chromatography (LC). The C2 peak was confirmed by liquid chromatography/mass spectrometry (LC/MS) with electrospray ionization (ESI). Recoveries of C0 from radish, tomato, onion, sweet potato, kidney bean, carrot, cabbage, and lettuce ranged from 91 to 118% following fortification at 0.05-1.0 ppm. The detection limit of C2 in crops was 0.01 ppm (S/N > 3). The fortified samples of onion, sweet potato, kidney bean, and carrot were confirmed by LC/MS (ESI), and the peak of C2 was detected.