Issue 27, 2016

Detection and quantification of food colorant adulteration in saffron sample using chemometric analysis of FT-IR spectra

Abstract

The aim of present study is to investigate the combination of Fourier transform infrared (FT-IR) spectroscopy with pattern recognition to recognize the standard saffron from those which have been adulterated with various types of food colorants. Transmittance FT-IR spectra have been obtained for standard saffron and six mixed samples with food colorants including Tartrazine, Sunset yellow, Azorubine, Quinoline-yellow, Allura red and Sudan II. Genetic algorithm-linear discriminant analysis (GA-LDA) based on the concept of clustering of variables has been applied to transmittance FT-IR spectra for classification of standard saffron from fraudulent samples. Analysis of the selected clusters of variables indicates that three bands corresponding to 1800–1830, 2600–2900 and 3700–3850 cm−1 are responsible for differentiation of standard samples from fraudulent ones. Regression analysis has been introduced in order to obtain information related to the amount of food colorant. A combination of FT-IR and the concept of clustering of variables resulted in the best performances for calibration and an external test set with 100% sensitivity and specificity.

Graphical abstract: Detection and quantification of food colorant adulteration in saffron sample using chemometric analysis of FT-IR spectra

Supplementary files

Article information

Article type
Paper
Submitted
06 12 2015
Accepted
18 2 2016
First published
19 2 2016

RSC Adv., 2016,6, 23085-23093

Detection and quantification of food colorant adulteration in saffron sample using chemometric analysis of FT-IR spectra

S. Karimi, J. Feizy, F. Mehrjo and M. Farrokhnia, RSC Adv., 2016, 6, 23085 DOI: 10.1039/C5RA25983E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements