Blueberries anthocyanin content

MALDI-TOF-MS has been used to identify and quantify other anthocyanins in foods.When the anthocyanin content of highbush blueberries at different stages of anthocyanin formation were analyzed by both HPLC and MALDI-TOF-MS, it was found that both techniques provided comparable quantitative anthocyanin profiles. While HPLC could distinguish anthocyanin isomers, MALDI-TOF-MS proved to be more rapid. MALDI-TOF-MS has also been used to identify the isoflavones in soy samples. In a comparison of several matrices, 2, 4, 6 -trihydroxyacetophenone (THAP) and 2,5-dihydroxybenzoic acid... 

Kalt, W. et al., Anthocyanin content and profile within and among blueberry species. Can. J. Plant Sci, 79, 617, 1999. 

Khanal, R.C. Howard, L.R. Brownmiller, C.R. Prior, R.L. 2009a. Influence of extrusion processing on procyanidin composition and total anthocyanin contents of blueberry pomace. J. Food Sci. 74 H52-H58. 

High anthocyanin content products (>100 mg in 100 g) Bilberry, black currant, black olives, black rice, blackberry, blueberry, cherry, chokeberry, elderberry, red grapes, pomegranate, purple com, raspberry, red cabbage... 

Coimor, A.M., et at, 2002. Variation and heritability estimates for antioxidant activity,total phenolic contenL and anthocyanin content in blueberry progenies. J. Am. Soc. Hort, 127 82-88 Crozier, A., Yokota, T., Jaganath, I.B., Marks, S.C., Saltmarsh, M., Clifford, M.N. 2006. Secondary metabolites in fruits, vegetables, beverages, and other plant based dietary components. In Plant Secondary Metabolites Ocurrence, Structure, and Role in the Human Diet, Crozier, A., Clifford, M.N., Ashihira, H., (eds.), Blackwell Publishing Oxford, U.K., pp. 208-302. 

Content and Recovery of Anthocyanins, Chlorogenic Acid, Flavonol Glycosides and Procyanidins in Highbush Blueberries (Vaccinium corymbosum var. Bluecrop) during Juice Processing1... 

Anthocyanin and polyphenolic contents are reported for both the actual sample (row labeled Sample ) and that derived from 100 g of berries (row labeled Blueberries ). Juice compositional data are reported on the basis of the actual °Brix, 15.0° to convert data to the U.S. single-strength °Brix standard of 10.0° (Anonymous, 1993), multiply by 0.666. 

Prior et al. (1998) reported that ORAC values of blueberries increased with maturity of the fruits, while various growing places throughout the United States did not affect the ORAC values. A linear relationship between ORAC values, i.e., antioxidant capacity as determined by the ORAC method, was obtained with the anthocyanin (rxy = 0.77) and total phenolics (rxv = 0.92) content. 

During storage of fresh strawberries, raspberries and highbush and lowbush blueberries at 0,10,20 and 30°C for up to 8 days, the antioxidant capacity was found to be stable or even to increase (Kalt et al., 1999a). The antioxidant capacity was strongly correlated with the content of total phenolics (r = 0.83) and anthocyanins... 

It could be clearly shown that pectinases increase the total content of anthocyanins in blueberry extracts up to 41% higher and in blackcurrant extracts up to 29%. On the other hand, a survey conducted for the enzyme preparation Econase CE showed a negative impact on the total content of anthocyanins extracted from blueberries, whereas no effect could be determined in black currant [117, 121]. 

Kim, J.G., Kim, H.L., Kim, S.J., and Park, K.S. 2013. Fruit quality, anthocyanin and total phenolic contents, and antioxidant activities of 45 blueberry cultivars grown in Suwon, Korea. J Zhejian University-SCIENCEB (Biomedicine Biotechnology) 74(9) 793—799. 

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