Determination of apple juice authenticity using GC-MS, volt-ampere, and new conductometric, methods

Organoleptic properties, and positive health effect on consumers, both justify the importance of the determination of apple juice authenticity, in respect of retail and wholesale trade networks worldwide. Adulteration of apple juice through dilution with water, and with ascorbic acid has been determ...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the science of food and agriculture 2018-03
Main Authors: Bocharova, Oksana V, Reshta, Sentyabrina P, Bocharova, Maiia Y, Eshtokin, Vasiliy I
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Organoleptic properties, and positive health effect on consumers, both justify the importance of the determination of apple juice authenticity, in respect of retail and wholesale trade networks worldwide. Adulteration of apple juice through dilution with water, and with ascorbic acid has been determined. It has been demonstrated that polarization curves of platinum electrode (Pt) in apple juice are useful for undeclared antioxidant determination, due to the movement of the polarization curve to the left, by 200 mV, when ascorbic acid was added. The difference between equivalent electrical conductivity of suspended solids of undiluted, and diluted (1:1), juices has been substantiated as a new quantitative criterion for the determination of adulteration through dilution. The criterion values range from 0.030 to 0.034 S/m for juices of different apple varieties. Gas chromatography-mass spectrometry (GC-MS) results have shown the presence of (E)-2-hexenal and n-hexanal in all tested juices obtained from different apple varieties. The new conductometric method for the determination of diluted apple juices has been substantiated. It has been established that the volt-ampere method is useful for the investigation of undeclared ascorbic acid.
ISSN:1097-0010