Quantification of aflatoxins in corn distributed in the city of Monterrey, Mexico
作者:
EsperanzaTorres Espinosa,
KarimAcuña Askar,
LidiaR. Naccha Torres,
RicardoMontoya Olvera,
JuanPedro Castrellón Santa Anna,
期刊:
Food Additives & Contaminants
(Taylor Available online 1995)
卷期:
Volume 12,
issue 3
页码: 383-386
ISSN:0265-203X
年代: 1995
DOI:10.1080/02652039509374319
出版商: Taylor & Francis Group
关键词: aflatoxins;stored corn;chromatography
数据来源: Taylor
摘要:
In this study kerneled corn sold and distributed through wholesale outlets in the city of Monterrey, Mexico was analysed. The extraction of aflatoxins was performed with a mixture of methanol/water (80:20) and its derivatization was carried out with trifluoroacetic acid. The analysis was done by high performance liquid chromatography (HPLC) using fluorescence for detection. From the 41 samples analysed, aflatoxins B1and G1, were found to be present. Aflatoxin B1concentrations ranged from 5.03 ng/g to 465.31 ng/g, aflatoxin G1concentrations ranged from 1.59 ng/g to 57.1 ng/g. It was found that 87.8% of the samples were contaminated with aflatoxins: in addition, 58.5% contained levels above Mexican legal limits which are, at present, 20 ng/g.
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