Innovative methodological approach using CIELab and dye screening for chemometric classification and HPLC for the confirmation of dyes in cassava flour: A contribution to product quality control was written by Filgueiras Rebelo de Matos, Marcia;Quenia Muniz Bezerra, Priscilla;Conceicao Argolo Correia, Luciana;Nunes Viola, Denise;de Oliveira Rios, Alessandro;Izabel Druzian, Janice;Larroza Nunes, Itaciara. And the article was included in Food Chemistry in 2021.Formula: C19H16O4 The following contents are mentioned in the article:
A variety of methods for producing cassava flour exist, resulting in very heterogeneous products that exhibit various colors, textures, granulometries, and flavours. To improve its attractiveness to consumers, some producers dye cassava flour with turmeric or tartrazine; however, this practice is illegal in Brazil. In this study, cassava flour samples were collected and evaluated for possible adulteration by the addition of dyes. Flours were analyzed by CIELab and dye screening (paper chromatog. and the turmeric-identification method) and a classification tree was developed using these data. Pos. results for curcuminoid pigments or tartrazine were confirmed by HPLC-DAD or HPLC-UV-Vis, resp. The developed approach is an innovative alternative chemometric-anal. method that facilitates highly practical screening; adulterated cassava flour, a product of great human-food importance, can be identified using CIELab parameters. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Formula: C19H16O4).
Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C19H16O4
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem