(Applicable to determination of patulin at >25 ng/g in clear apple juice, cloudy apple juice, and apple puree.)
See Table
2000.02 for results of the interlaboratory study supporting the acceptance of the method.
A. Principle
Apple juice or puree is extracted with ethyl acetate and then cleaned up by extraction with sodium carbonate solution. (Cloudy apple juice and apple purees are pretreated with pectinase enzyme.) The ethyl acetate extract is dried with anhydrous sodium sulfate. After evaporation of the solvent, patulin is quantitatively determined by LC with UV detection.
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