The absorbance was measured spectrophotometrically at
510 and 700 nm in buffers at pH 1.0 and 4.5, using A = [(A510–
A700)pH1.0 (A510––A00)pH4.5]. The results were expressed as mg of
cyanidin-3-glucoside equivalents per 100 g of fresh weight (mg Cya
3100 g1 fw)