On the quality control of traded saffron by means of transmission Fourier-transform mid-infrared (FT-MIR) spectroscopy and chemometrics

•Saffron quality control needs updated tools such as the dynamic FT-MIR spectroscopy.•Spectral FT-IR changes due to saffron storage were monitored by overlapping spectra and chemometrics.•The region at 1200–1000cm−1 was the most useful for diagnostic monitoring of storage effects. The present study...

Full description

Saved in:
Bibliographic Details
Published in:Food chemistry 2014-05, Vol.150, p.414-421
Main Authors: Ordoudi, Stella A., de los Mozos Pascual, Marcelino, Tsimidou, Maria Z.
Format: Article
Language:English
Subjects:
Band spectra
Bands
Biological and medical sciences
Crocus - chemistry
Flowers - chemistry
Food Contamination - analysis
Food Storage
Food toxicology
Fraud
FT-IR
Medical sciences
Monitoring
Principal Component Analysis
Quality Control
Saffron
Specifications
Spectroscopy
Spectroscopy, Fourier Transform Infrared - methods
Storage
Toxicology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Saffron quality control needs updated tools such as the dynamic FT-MIR spectroscopy.•Spectral FT-IR changes due to saffron storage were monitored by overlapping spectra and chemometrics.•The region at 1200–1000cm−1 was the most useful for diagnostic monitoring of storage effects. The present study aimed to extend application of the FT-MIR technique to the quality control of traded saffron that suffers various types of fraud or mislabelling. Spectroscopic data were obtained for samples stored for different periods in the dark. Samples with the highest quality according to ISO 3632 specifications produced a typical spectrum profile (reference set). Principal Component Analysis (PCA) of spectroscopic data for this set along with HPLC-DAD analysis of major apocarotenoids assisted identification of FT-IR bands that carry information about desirable sensory properties that weaken during storage. The band at 1028cm−1, associated with the presence of glucose moieties, along with intensities in the region 1175–1157cm−1, linked with breakage of glycosidic bonds, were the most useful for diagnostic monitoring of storage effects on the evaluation and test set samples. FT-IR was found to be a promising, sensitive and rapid tool in the fight against saffron fraud.
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2013.11.014