title: Rapid authentication of concord juice concentration in a grape juice blend using Fourier-Transform infrared spectroscopy and chemometric analysis.
abstract: Concord grape juice is associated with many health benefits, and so it can be sold at a premium price. However, there is currently no method to verify the percent composition of Concord grape juice in grape juice blends. In order to guard against potential adulteration, a rapid method for authentication is required. Fourier Transform infrared (FT-IR) spectroscopy was used to develop a model which predicts the percent composition of Concord grape juice. The model was based on a training set of 64 samples with Concord concentrations ranging from 50% to 100%. Data was collected on an external validation set with a standard error of prediction of 5.6% using 7 factors. The results suggest the feasibility of using FT-IR coupled with chemometrics as a production-scale tool for authentication claims of Concord in grape juice blends, protecting consumers and businesses against deceptive labelling.
authors.affiliation: Department of Food Science and Technology, The Ohio State University, 2015 Fyffe Rd., Columbus, OH 43210, United States.
authors.forename: Abigail B
authors.initials: AB
authors.lastname: Snyder
authors.forename: Christian F
authors.initials: CF
authors.lastname: Sweeney
authors.forename: Luis E
authors.initials: LE
authors.lastname: Rodriguez-Saona
authors.forename: M Monica
authors.initials: MM
authors.lastname: Giusti
mesh_terms: D001628:Beverages / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D027843:Vitis / Q000737:chemistry*
keywords: Authentication; Chemometrics; Concord; Grape juice; Infrared-spectroscopy