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Establishment of an isotope dilution LC-MS/MS method revealing kinetics and distribution of co-occurring mycotoxins in rats

文献类型： 外文期刊

作者： Han, Zheng 1 ; Zhao, Zhiyong 1 ; Song, Suquan 1 ; Liu, Gang 1 ; Shi, Jianxin 3 ; Zhang, Jingbo; Liao, Yucai; Zhang, 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Agri Food Stand & Testing Technol, Lab Qual & Safety Risk Assessment Agroprod Shangh, Minist Agr, Shanghai 201403, Peoples R China

2.Univ Ghent, Fac Pharmaceut Sci, Lab Food Anal, B-9000 Ghent, Belgium

3.Shanghai Jiao Tong Univ, Bor Luh Food Safety Ctr, Sch Life Sci & Biotechnol, Shangha

期刊名称：ANALYTICAL METHODS （ 影响因子：2.896； 五年影响因子：2.716 ）

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收录情况： SCI

摘要： An isotope dilution liquid chromatography-tandem mass spectrometry (LC-MS/MS) method with a fast sample preparation using homemade clean-up cartridges was developed for simultaneous determination of co-occurring mycotoxins exemplified with aflatoxin Bl (AFB1) and T-2 toxin (T-2) in representative biomatrices of rat plasma, heart, liver, kidney, spleen, lung and brain in a total run time of 7 min. The established approach using stable internal standards of [~(13)C_(17)]-AFBl and [~(13)C_(24)]-T-2 was extensively validated by determining the specificity, linearity (R~2 > 0.9990), sensitivity (lower limit of quantitation at 0.05 ng mL~(-1)), accuracy (70.9-107.7%), precision (RSD ≤14.2%) and stability (≥70.8%). Based on this methodological advance, the subsequent kinetics and tissue distribution after oral administration of 0.5 mg kg~(-1) b.w. of both AFB1 and T-2 in rats were thoroughly studied. As revealed, both AFB1 and T-2 were rapidly eliminated with the half-life time (t_(1/2)) in plasma of 8.44 ± 4.02 h and 8.12 ± 4.05 h, respectively. Moreover, AFB1 accumulated in all organs where the highest concentration was observed in liver (1.34 μg kg~(-1)), followed by kidney (0.76 μg kg~(-1)). Notably, only low levels of T-2 were observed in spleen (0.70 μg kg~(-1)) and in liver (0.15 μg kg~(-1)). The achieved data as supporting evidence would substantially promote the practical application of the proposed LC-MS/MS method for in vivo toxicokinetics and toxicity studies of co-occurring mycotoxins imitating natural incidence in rat system.

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