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KMID : 1007520020110010062
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Food Science and Biotechnology
2002 Volume.11 No. 1 p.62 ~ p.65
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Irradiation Effects on Kinetics and Nitrosation of Volatile N-Nitrosamine in Different Solvent Systems
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Ahn, Hyun Joo
Kim, Jae Hyum/Yook, Hong Sun/Lee, Cherl Ho/Byun, Myung Woo
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Abstract
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Gamma irradiation was applied to destroy the volatile N-nitrosamine and its kinetic studies were performed. N-nitrosodimethylamine (NDMA) and N-nitrosopyrrolidine (NPYR) were dissolved in ethanol, dichloromethane or distilled water, respectively, and irradiated at 2.5, 5.0, 7.5, 10, 15, and 20 kGy. The concentration of NDMA or NPYR was determined by GC-TEA. NDMA and NPYR dissolved in ethanol were most resistant to irradiation and their breakdown rates were 90% or above at 20 kGy. However, NDMA and NPYR in distilled water or dichloromethane were easily broken at 5 kGy or above. The breakdown rate constant (K) of NDMA in distilled water and NPYR in dichloromethane has relatively increased. NDMA and NPYR reformation was not observed by in vitro test from degraded compounds without nitrite, while NDMA and NPYR were found by exposure of irradiated products to nitrite. Gamma irradiation showed a potential to reduce carcinogenic N-nitrosamine in food and other materials.
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KEYWORD
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