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A method for detecting cows' milk added to goats' milk


, : A method for detecting cows' milk added to goats' milk. Scienza e Tecnica Lattiero Casearia 31(2): 139-143

A method proposed for detection of cows' milk added to goats' milk is based on detection of xanthine oxidase, which is present in much greater quantities in cows' milk. The milk sample (0.5 ml) is treated with 1 ml of a solution of vanillin, which is oxidized by xanthine oxidase to vanillic acid. This produces a blue colour when 0.25 ml of 2,6-dibromoquinone-4-chlorimide solution is added.

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Other references

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