title: Composition of pomegranate juice.
abstract: A database of 793 commercial pomegranate juices was analyzed to produce a profile for authentication of pure pomegranate juice. The database consisted of data from a mix of authentic and adulterated samples. Statistical tools were used to reduce the database to a stable sample set of 477 presumably authentic samples. The profile obtained (mean, SD at 16 Brix) are as follows: fructose (g/100 g) 6.83, 0.50; glucose (g/100 g) 6.66, 0.44; sucrose (g/100 g) 0.00, 0.00; sorbitol (g/100 g) 0.00, 0.01; acidity (g/100 g as citric acid) 1.25, 0.32; citric acid (g/100 g) 1.19, 0.30; malic acid (g/100 g) 0.065, 0.034; tartaric acid (g/100 g) 0.00, 0.00; isocitric acid (mg/kg) 63, 21; potassium (mg/kg) 2320, 400; proline (mg/kg) 7, 5; formol value [milliequivalents/100 g] 1.00, 0.24; 13C/12C ratio [o/oo Pee Dee belemnite]-26.4, 0.8. The profile samples had a consistent anthocyanin pattern consisting of four major peaks corresponding to delphinidin-3,5-diglucoside, delphinidin-3-glucoside, cyanidin-3,5-diglucoside, and cyanidin-3-glucoside. Minor peaks corresponding to pelargonidin-3,5-diglucoside and pelargonidin-3-glucoside were also generally present. No maltose, D-malic acid, or tartaric acid were detected in any of the samples. The profile obtained corresponds closely with previously published data.
authors.affiliation: Krueger Food Laboratories, Inc., 45 Manning Rd, Billerica, MA 01821, USA. dkrueger@kfl.com
authors.forename: Dana A
authors.initials: DA
authors.lastname: Krueger
mesh_terms: D000143:Acids / Q000032:analysis; D000872:Anthocyanins / Q000032:analysis; D001628:Beverages / Q000032:analysis; D002241:Carbohydrates / Q000032:analysis; D002244:Carbon / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003627:Data Interpretation, Statistical; D005506:Food Contamination; D005557:Formaldehyde / Q000032:analysis; D029561:Lythraceae / Q000737:chemistry*; D009844:Oligosaccharides / Q000032:analysis; D011188:Potassium / Q000032:analysis; D011392:Proline / Q000032:analysis; D013395:Sucrose / Q000032:analysis; D013402:Sugar Alcohols / Q000032:analysis; D013549:Sweetening Agents / Q000032:analysis
chemical_list: D000143:Acids; D000872:Anthocyanins; D002241:Carbohydrates; D009844:Oligosaccharides; D013402:Sugar Alcohols; D013549:Sweetening Agents; D005557:Formaldehyde; D013395:Sucrose; D002244:Carbon; D011392:Proline; D011188:Potassium