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KMID : 1007520120210020518
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Food Science and Biotechnology
2012 Volume.21 No. 2 p.518 ~ p.524
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Photo-degradation of Malachite Green in Mudfish Tissues - Investigation of UV-induced Photo-degradation
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Lee Jun-Bae
Kim Mee-Hye
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Abstract
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Ultraviolet (UV) light induced photo-degradation of malachite green (MG) was investigated in the absence of photocatalysts. Photo-degraded intermediates were identified using LC with visible detection and LCelectrospray ionization-MS. Using this analysis, mechanisms for the MG decomposition in aqueous solution and in mudfish tissue were suggested. In aqueous condition, Nde- methylation and the decomposition of the conjugated structures were mainly observed. On the other hand, MG levels in mudfish continuously decreased until they reached a plateau owing to the decomposition of the conjugated structures. These results show that some chemicals in fish tissues could be photo-degraded by UV light without photocatalysts.
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KEYWORD
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malachite green, photo-degradation, N-demethylation, decomposition of the conjugated structure
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