simple, rapid and accurate method for the simultaneous determination of melamine and its analogues cyanuric acid, melamine monoamide and melamine diamide in rice protein powder was established. After ultrasonic extraction of the sample with diethylamine-water-acetonitrile (1:4:5, V/V) for 30 minutes, the extract was dried with nitrogen at 70¡ãC, derivatized by methylsilanization in pyridine medium, and then subjected to gas chromatography. – Mass spectrometer measurement (internal standard method for quantitation). The detection limit of this method is 0.5 mg/kg, and the linear correlation coefficient (in the range of 20 to 1000 ¦Ìg/L) is not less than 0.9989; when the standard addition amount is 1.0 to 5.0 mg/kg, the average recovery rate is 72.01% to 96.45%, relative to the standard The deviation is no more than 6.3%. This method can be used for the detection of cyanuric acid and its analogues in rice protein powder

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Original research was done by Zuo Haigen

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