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Composition of pomegranate juice
1Krueger Food Laboratories, Inc., 45 Manning Rd, Billerica, MA 01821, USA. dkrueger@kfl.com
Journal of AOAC International
|April 4, 2012
Summary
This study establishes a chemical profile for authentic pomegranate juice using statistical analysis of commercial samples. The findings provide a benchmark for identifying pure pomegranate juice and detecting adulteration.
Area of Science:
- Food Science
- Analytical Chemistry
- Agricultural Chemistry
Background:
- Pomegranate juice authenticity is crucial for consumer trust and fair trade.
- Adulteration of high-value juices like pomegranate is a significant concern in the food industry.
- Establishing reliable analytical profiles is key to quality control.
Purpose of the Study:
- To develop a comprehensive analytical profile for authentic commercial pomegranate juice.
- To utilize statistical methods for identifying a stable set of genuine samples from a larger database.
- To provide a reference standard for the authentication of pure pomegranate juice.
Main Methods:
- Analysis of a large database (793 samples) of commercial pomegranate juices.
- Application of statistical tools to filter and select a representative set of 477 presumably authentic samples.
- Characterization of the selected samples based on key chemical constituents and anthocyanin patterns.
Main Results:
- A detailed profile of authentic pomegranate juice was established, including sugar content (fructose, glucose), organic acids (citric, malic), and minerals (potassium).
- Specific anthocyanin profiles were identified, dominated by delphinidin and cyanidin glucosides.
- Key compounds like maltose, D-malic acid, and tartaric acid were found to be absent in authentic samples.
Conclusions:
- The established profile serves as a reliable standard for pomegranate juice authentication.
- The findings aid in distinguishing pure juice from adulterated products.
- This research contributes to ensuring the quality and integrity of the pomegranate juice market.
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