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  • Title: Absence ochratoxin A in soy sauce.
    Author: Blesa J, Soriano JM, Moltó JC, Mañes J.
    Journal: Int J Food Microbiol; 2004 Dec 15; 97(2):221-5. PubMed ID: 15541809.
    Abstract:
    A method is described for the determination of ochratoxin A (OTA) in soy sauce using phosphate-buffered saline (PBS) extraction, an immunoaffinity clean-up, a liquid chromatographic determination with fluorescence detection (LC-FD) and confirmation with LC-FD after methylation of OTA. Recoveries of OTA spiked to soy sauce samples at 0.25 ng/ml level were 90% with relative standard deviations of 4%. The limit of detection was 0.01 ng/ml for OTA using the proposed method. Furthermore, the proposed method was applied to 60 soy sauce samples from China and Japan and none of them were found to contain OTA.
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