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Detection of Tartrazine in Fake Saffron Containing Products by a Sensitive Optical Nanosensor Publisher Pubmed



Zoughi S1 ; Faridbod F1 ; Amiri A1 ; Ganjali MR1, 2
Authors
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Authors Affiliations
  1. 1. Analytical Chemistry Department, Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
  2. 2. Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

Source: Food Chemistry Published:2021


Abstract

A fluorescent assay for the selective analysis of tartrazine was developed. Tartrazine is a health-threatening food additive commonly used as fake saffron. An optical nanosensor was fabricated based on molecular imprinting technique in which carbon dots (CDs) as fluorophores and tartrazine as a template molecule were embedded in molecularly imprinted polymer (MIP) matrix. The synthesized CDs embedded in MIP (CDs-MIP) was characterized by various methods. The fluorescence intensity of (CDs-MIP) was selectively quenched in the presence of tartrazine in comparison with other similar food color additives. The correlation between the quenching of CD-MIP and the concentration of tartrazine was used as an optical sensing for rapid detection of tartrazine in the range of 3.3–20.0 nM (1.8–10.7 μg L−1) with detection limit of 1.3 nM (0.70 μg L−1). Eventually, the designed nanosensor was successfully applied for tartrazine detection in foodstuffs such as fake saffron, saffron tea and saffron ice cream samples. © 2021 Elsevier Ltd
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