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Combination of solvent and radiation effects on degradation of aflatoxin B1

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Summary

Degradation of aflatoxin B1 in chloroform, ethyl ccetate and coconut oil were examined by exposing the solvents in the form of thin layers to radiation from the sun and from UV and fluorescent tubes. Solar degradation of aflatoxin B1 occurred in coconut oil leaving no residual aflatoxin B1 or any new fluorescent derivatives. Other combinations of solvents and radiation produced up to four new fluorescent degradation compounds. Aflatoxin B1 did not undergo solar degradation in the absence of moisture. Acidity enhanced solar degradation. A fluorescent derivative produced by solar degradation of aflatoxin B1 in chloroform degraded further on solar irradiation in coconut oil but not in chloroform.

Résumé

La dégradation de l'aflatoxine B1 dans le chloroforme, l'acétate d'éthyle et l'huile de noix de coco a été examinée en exposant les solvents sous la forme de films minces à l'irradiation du soleil, des uv et de tubes fluorescents. La dégradation solaire de l'aflatoxine B1 s'est produite dans l'huile de noix de coco en ne laissant ni aflatoxine B1 résiduelle ni nouveaux dérivés fluorescents. D'autres combinaisons de solvents et d'irradiation ont produit jusqu'à 4 nouveaux dérivés fluorescents de dégradation. L'aflatoxine B1 ne subit pas de dégradation solaire en absence d'humidité. L'acidité augmente la dégradation solaire. Un dérivé fluorescent produit par dégradation solaire de l'aflatoxine B1 dans le chloroforme, s'est dégradé davantage sous l'irradiation solaire dans l'huile de noix de coco mais non dans le chloroforme.

Resumen

Se examinó la degradación de la aflatoxina B1 en cloroformo, acetato de etilo y aceite de coco, exponiendo los disolventes en forma de capa fina a la radiación solar y a radiaciones procedentes de lámparas UV y fluorescentes. La degradación solar de la aflatoxina B1 tuvo lugar en aceite de coco sin dejar residuos de aflatoxina ni de ningún nuevo derivado fluorescente. Otras combinaciones de disolvente y radiaciones produjeron hasta 4 nuevos derivados fluorescentes. La degradación solar de la aflatoxina B1 no se produjo en ausencia de humedad. La acidez potenció la degradación solar. Uno de los derivados fluorescentes obtenidos en la degradación solar de la aflatoxina B1 en cloroformo continuó degradándose bajo la radiación solar en aceite de coco pero no en cloroformo.

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Samarajeewa, U., Gamage, T.V. Combination of solvent and radiation effects on degradation of aflatoxin B1 . Mircen Journal 4, 203–208 (1988). https://doi.org/10.1007/BF01301948

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  • DOI: https://doi.org/10.1007/BF01301948

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