Simultaneous analysis of thiabendazole, carbendazim and 2-aminobenzimidazole in concentrated fruit juices by liquid chromatography after a single mix-mode solid-phase extraction cleanup.

XiaoS Liu, ZhangF Tong, Ling Zhen, DaX Huang, Xin Gao, ChaoY Xu

Index: J. Environ. Sci. Health B 44(6) , 591-7, (2009)

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Abstract

A method using liquid chromatography and a single mix-mode solid-phase extraction cleanup for the simultaneous analysis of thiabendazole [2-(1,3-thiazol-4-yl)-1H-benzoimidazole], carbendazim [(methyl N-(1H-benzoimidazol-2-yl)-carbamate)] and 2-aminobenzimidazole (1H-benzimidazol-2-amine) in concentrated fruit juices is described. The three fungicides were isolated from the samples and concentrated by solid-phase extraction on Oasis MCX cartridges. The determination was performed by liquid chromatography with a diode array, detecting at 288 nm. In this method, the average recoveries from blank control juice samples spiked in a concentration range of 0.01-0.10 mg/kg were in the range of 81-95%, with relative standard deviations below 8%. Detection limits and limits of quantification were 4 micro g/kg and 10 micro g/kg, respectively, for each fungicide. Real juice samples were analyzed by the proposed method. The results were compared to those from liquid chromatography-tandem mass spectrometry.