Thin layer chromatography and densitometric determination of aflatoxins in mixed feeds containing citrus pulp.

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Abstract

A method for the accurate one-dimensional thin layer chromatographic (TLC) determination of aflatoxins B1, B2, G1, and G2 in mixed feeds is presented. The aflatoxins are extracted from the sample with chloroform and purified by solvent partitioning. Each aflatoxin is separated from pulp interference by thin layer chromatography on aluminum-backed silica plates. The separated aflatoxins are detected by fluorescence densitometry. Average recoveries for samples spiked from 10 to 100 ppb B1 and G1 and from 3 to 30 ppb B2 and G2 are 82, 84, 95, and 94% for B1, B2, G1, and G2, respectively. The above recovery data, when analyzed for overall method repeatability, produced relative standard deviations of 6.8, 4.3, 6.9, and 7.6% for B1, B2, G1, and G2, respectively. Minimum detection level is less than 1 ppb for each aflatoxin. B1 is confirmed by trifluoroacetic acid derivative formation on a silica TLC plate.

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APA

Pennington, L. J. (1986). Thin layer chromatography and densitometric determination of aflatoxins in mixed feeds containing citrus pulp. Journal - Association of Official Analytical Chemists, 69(4), 690–696. https://doi.org/10.1093/jaoac/69.4.690

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