Fruits and fruit products

Abstract

Method Updates There are several AOAC Official Methods in the Fruit and Fruit Products topic area that have been adopted as Final Action in the last year. • 994.11 Benzoic Acid in Orange Juice, Liquid Chromatographic Method • 992.09 Sugar Beet-Derived Syrups in Frozen Concentrated Orange Juice 18O Measurements in Water, Stable Isotope Ratio Mass Spectrometric Method • 993.05 L-Malic/Total Malic Acid Ratio in Apple Juice, Liquid Chromatographic Method (Total Malic Acid) Enzymatic Method (L-Malic Acid) The European Commission, through the Standards, Measurements, and Testing Program, has provided funding for collaborative studies to evaluate the HPLC determination of 6 groups of analytes in fruit juices: organic acids, anthocyanins, carotenoids, polymethoxyflavones, oligosaccharides, and nitrates. The interlaboratory studies to take place in 1999 will test the reliability and applicability of the methods, leading to harmonized analytical procedures.