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- W2046152110 abstract "Abstract Corn infected by Aspergillus flavus and A. parasiticus is frequently contaminated with aflatoxin. If the contamination exceeds 20 ppb, the corn is considered unfit for animal consumption and is often plowed into the soil. This study was undertaken to determine the fate of aflatoxin in the soil. Aflatoxin B 1 was added to soil at a rate of 10,000 ppb. The soil was periodically extracted with acetone, and the quantity and species of aflatoxins were determined using thin‐layer chromatographic procedures. The rate of decomposition was also monitored by adding 14 C‐aflatoxin to the soil and periodically measuring the evolution of 14 CO 2 . Aflatoxin B 1 was observed to be rapidly reduced to aflatoxin B 2 when added to the soil. The speed of this reaction suggests a chemical mechanism. The resulting aflatoxin B 2 decomposed at a much slower rate, declining to a level where it could no longer be detected at 77 days. Aflatoxin G 2 was also detected 2 days after the addition of aflatoxin B 1 to the soil. Its concentration remained, however, well below that of the other aflatoxins observed. Aflatoxin G 2 reached a maximum concentration at 14 days after the addition of aflatoxin B 1 to the soil and was no longer detectable at 49 days. Microbial decomposition of 14 C‐aflatoxin B 1 , as measured by CO 2 evolution, accounted for 14% of added 14 C in 112 days of incubation. When wheat straw or sugar was added to the soil, the amount of aflatoxin C liberated as CO 2 was less." @default.
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- W2046152110 date "1980-11-01" @default.
- W2046152110 modified "2023-09-27" @default.
- W2046152110 title "Decomposition of Aflatoxin in Soil" @default.
- W2046152110 doi "https://doi.org/10.2136/sssaj1980.03615995004400060021x" @default.
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