Carotenoid analysis anthocyanins

Brown, C. R., Gulley, D., Yang, C. -P, Durst, R., Wrolstad, R. (2005). Variation of anthocyanin and carotenoid contents and associated antioxidant values in potato breeding lines. J. Am. Soc. Hortic. ScL, 130, 174-180. Brown, M. S., McDonald, G. M., Friedman, M. (1999). Sampling leaves of young potato Solanum tuberosum) plants for glycoalkaloid analysis. J. Agric. Food Chem., 47,2331-2334. 

The discussion above has addressed the assessment of a product s colour or perceived colour in basic terms. In the next two sections, methods to determine which coloured compounds are present in a product will be addressed. For the purpose of this chapter, the section on synthetic dyes will cover the analysis of the water-soluble dyes, or so-called coal tar dyes, and the section on natural pigments will cover the anthocyanin pigments, such as grape skin extracts, and the carotenoid-based materials, even if they are of synthetic origin. 

There are lots of research applications published regarding PLE and analysis of various compoimds in food and agricultural materials, for example pesticides in rapeseed (38), babyfood (39) and strawberries (40), lipids in com and oats (41) and in egg-containing foods (42), acrylamide in food samples (43), carotenoids in processed food (44), xanthones and flavanones in root bark (45), tocopherols in seeds and nuts (46), antioxidants in microalgae (47) and anthocyanins and total phenolics in dried red grape skin (48). More discussions... 

Divided into 10 chapters, this book gathers updated, in-aepth treatments of the methods of analysis for phytoestrogens, fatty acids and conjugated linoleic acid, flavonoids, anthocyanins, carotenoids and provitamin A, chlorophylls, water soluble vitamins, amino acids, and carbohydrates. It also includes specialty information such as the use of residues from vineyards and oil production for phenolic compounds. 

Also Raman mapping combined with cluster analysis was successfully applied to discriminate flavonoids, anthocyanins, and carotenoids occurring in differently colored flower petals of various pansy cultivars Viola X wittrockiana) [27]. Extracts of the viola petals were separated by thin-layer chromatography (TLC) in order to get the Raman data of the individual pure substances. Applying hierarchical cluster analysis (HCA) of the spectra taken from the flower petals and from the pure TLC extracts, flavonols, anthocyanins, and carotenoids could... 

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