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Current Nutrition & Food Science

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ISSN (Print): 1573-4013
ISSN (Online): 2212-3881

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Research Article

Determination and Evaluation of Natural and Synthetic Dyes in Traditional Rock Candies (Nabat) Distributed in Tehran

Author(s): Zahra Sadeghi, Nabi Shariatifar *, Gholamreza J. Khaniki, Ramin Nabizadeh and Amin M. Khaneghah*

Volume 16, Issue 5, 2020

Page: [788 - 793] Pages: 6

DOI: 10.2174/1573401315666190717122120

Price: $65

Abstract

Background: The color of food products is one of the most important factors proposed by the consumer. Therefore, incorporation of coloring agents into food dates back to ancient times. Nowadays, various types of synthetic dyes are produced and widely used as part of formulations of food products to increase customer’s interest As the safety of this material is questionable, many of them are banned, or the level of their use is limited by the authorities. Among them, saffron is the only food color permitted for use in Nabat as a traditional rock candy which is mostly consumed in Iran. Therefore, the current investigation was aimed to determine the levels of artificial colors in traditional hard candy (Nabat) manufactured by organized and unorganized sectors distributed in Tehran.

Methods: In this regard, 137 samples, (68 samples from unorganized sector and 69 samples from the organized sector), were collected in summer 2016. Analysis of samples was done according to the Iranian national standard through thin layer chromatography method. Also, the High-performance thin layer chromatography was used for reanalyzing five samples.

Results: Findings showed that 64.7% of unorganized rock candy contained artificial food colors that 26.53% of these dyes are banned. About 5.8% of samples from the organized sector contained synthetic dyes that 25% of them are forbidden. The most commonly used color in both groups was defined as quinoline yellow.

Conclusion: The high percentage of synthetic food color usage in unorganized sectors urges the necessity to control them, especially the incorporation of synthetic food dyes in Nabat. Therefore, the training providers and consumers and the monitoring of the production, have encouraged the manufacturers to develop and deploy health professionals and health license.

Keywords: Quinoline yellow, rock candy, sunset yellow, tartrazine, thin-layer chromatography, synthetic food.

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