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侯先生 13691497252 • Ultra Aqueous C18 HPLC column separates the four Sudan dyes in 20 minutes. • Simple methanol and water mobile phase; two wavelengths detect all four dyes. • Two wavelengths detect all four dyes. Sudan dyes are synthetic industrial azo-dyes traditionally used in waxes, plas-Figure 1 Monitor Sudan I, II, III andtics, oils, and polishes. Although recognized as recently have been found in food products in some European countries. They are added to foods such as chili powders to mimic, intensify, and prolong the appearance of natural red hues. In the UK, more than six hundred products containing Sudan dyes have been recalled, the largest food recall in British his¬tory.¹
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