Contamination of aflatoxins in different kinds of foods in China.

Biomedical and environmental sciences : BES Pub Date : 2007-12-01

Jun Wang, Xiu-Mei Liu

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Abstract

Objective: To study the contamination of total aflatoxins (AFs) in different kinds of foods including corn, peanut, rice, walnut, and pine nut in six provinces and two municipalities in China.

Methods: A total of 283 samples of corn, peanut, rice, walnut and pine nut were randomly collected from local markets in Fujian, Guangdong, Guangxi, Hubei, Jiangsu, and Zhejiang provinces, as well as in Shanghai and Chongqing municipalities. The samples were ground to which acetonitrile/water solution was added. After filtering, the extract was transferred into a MycoSep purifying column and was pressed slowly. Then the purified liquid was derivatized with trifluoroacetic acid (TFA) and assayed using high performance liquid chromatography (HPLC).

Results: AFs were detected in 70.27% of corn samples, with a mean level of 27.44 microg/kg and the highest level of 1098.36 microg/kg. In peanut, the AFs detection rate was 23.08%, with a mean level of 0.82 microg/kg and the highest level of 28.39 microg/kg. Very few rice samples with AFs were detected. The AFs levels were very low in walnut and pine nut.

Conclusion: Corn is the food most seriously contaminated with AFs in China. AFB1 is the main aflatoxin which is found as a contaminant in foods.

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中国不同食品中黄曲霉毒素的污染。

目的:了解全国6省2市玉米、花生、大米、核桃、松子等不同食品中总黄曲霉毒素(AFs)的污染情况。方法:在福建、广东、广西、湖北、江苏、浙江五省及上海、重庆等地随机抽取玉米、花生、大米、核桃、松子等共283份样品。样品研磨后加入乙腈/水溶液。过滤后，将提取液转移到MycoSep纯化柱中，缓慢加压。然后用三氟乙酸(TFA)衍生化，用高效液相色谱(HPLC)进行分析。结果:70.27%的玉米样品中检出AFs，平均含量为27.44 μ g/kg，最高含量为1098.36 μ g/kg。花生AFs检出率为23.08%，平均检出率为0.82 μ g/kg，最高检出率为28.39 μ g/kg。检出AFs的水稻样品很少。核桃和松子的AFs含量很低。结论:玉米是中国AFs污染最严重的食品。AFB1是主要的黄曲霉毒素，在食品中被发现是一种污染物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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