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KMID : 1007520220310040475
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Food Science and Biotechnology
2022 Volume.31 No. 4 p.475 ~ p.482
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Simple chromatographic determination of aflatoxins in Korean fermented soybean products doenjang, ganjang, and gochujang, with comparison of derivatization methods
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Woo So-Young
Ok Hyun-Ee
Lee Sang-Yoo
Jeong A-Yeong
Jeong Tae-Kyun
Chun Hyang-Sook
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Abstract
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Korean fermented soybean products doenjang, ganjang, and gochujang are vulnerable to contamination with aflatoxigenic fungi in the open fermentation environment. Therefore, simple and effective methods to determine aflatoxins (AFs) in these complex food matrices are needed. High-performance liquid chromatography with fluorescence detection using two derivatization methods for AF determination in three fermented soybean products was optimized and validated. Pre-column derivatization (preCD) of the AF extracts was performed using trifluoroacetic acid, and post-column derivatization (PCD) was performed in a photochemical reactor for enhanced detection. Both derivatization methods resulted in acceptable performances for linearity (R2?>?0.999), recovery (71?118%), and precision (
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KEYWORD
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Aflatoxin, Photochemical reactor for enhanced detection, Doenjang, Ganjang, Gochujang
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