The pH differential method has been used extensively by food technologists and horticulturists to assess the quality of fresh and processed fruits and vegetables. The method can be used for the determination of total monomeric anthocyanin content, based on the structural change of the anthocyanin chromophore between pH 1.0 and 4.5 (Figure 2). The anticipated use of the method is in research and for quality control of anthocyanin-containing fruit juices, wines, natural colorants, and other beverages.