Rapid UV/Vis Spectroscopic Dye Authentication Assay for the Determination and Classification of Reactive Dyes, Monascus Pigments, and Natural Dyes in Coloring Foodstuff
| Autor: | Andreas Juadjur, Greta Bischof, Gerold Jerz, Volker Heinz, Peter Winterhalter, Pia Bergmann, Edwin Januschewski, Binh Nguyen Thanh |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
1h nmr spectroscopy Chromatography biology Food fraud Chemistry 010401 analytical chemistry General Chemistry Textile dye Monascus biology.organism_classification 01 natural sciences 0104 chemical sciences Pigment Ultraviolet visible spectroscopy visual_art Screening method visual_art.visual_art_medium Coloring food General Agricultural and Biological Sciences 010606 plant biology & botany |
| Zdroj: | Journal of Agricultural and Food Chemistry. 68:11839-11845 |
| ISSN: | 1520-5118 0021-8561 |
| Popis: | Food authenticity in the field of food dyes can be interpreted as the correctness of the coloring ingredients indicated. The Rapid UV/vis Spectroscopic Dye Authentication Assay (RaSDAY) presented in this work was used to verify the authenticity of water-soluble reddish colorings for food use. RaSDAY includes the processing of samples under different experimental conditions with pH variations and heat exposure. The absorbances measured are analyzed by principal component analysis and a k-nearest neighbors algorithm. As a result, classification of anthocyanins, betalains, and carmine and the detection of Monascus pigments, undeclared artificial food dyes, and reactive textile azo dyes can be performed by utilizing a rapid screening method. In 17 out of 20 samples of coloring food additives that were included in this work, reactive dyes, unpermitted Monascus pigments, and artificial food dyes were detected using the developed method. "Reactive Red 120", "Reactive Red 195", and "Reactive Red 198" were identified by subsequent 1H NMR spectroscopy in eight of those samples. |
| Databáze: | OpenAIRE |
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