RED CARROT ROOTS PROCESSED WASTES AS A SOURCE OF NATURAL RED PIGMENTS

Abstract: This study was carried out to investigate the possibility of producing some natural red pigment from red carrot roots processed wastes (after processing to jam ). This included fixing the efficiency of extraction of those aforementioned pigments. Besides, identification of the main components forming those extracted pigments. The aim was also extended to assess the suitability of utilization of the separated pigments as coloring agents in ice cream.
The obtained results through this work revealed that the separated or extracted pigments either by acidified water ( 2, 3 and 4 % citric acid concentrations ) or by water alone were anthocyanines. It was also proved that the extraction with acidified water was more efficient compared to extraction with distilled water. As regards extraction with acidified water using 4 % citric acid was the best methodology and the best technique for the natural red pigments extraction.
Concerning the chemical components identified in the natural red pigments extracted with 4 % citric acid solution indicated five identified components; petunidin, peonidin, cyaniding, malvidin and pelargonidin. It was also found that the content of anthocyanin in red carrot roots processed wastes remaining after processing to jam was about 1228.77 mg / 100 g wastes ( on dry weight basis ). It was also successful and applicable to utilize the extracted natural red pigments in coloring ice cream in some concentrations. As regards effect of storage at ( – 18o C ) on the red color used in ice cream, no pronounced changes or deterioration was noticed in the color during 21 days. Finally, it could be concluded through this study that it was practical, and economical to utilize natural red pigments extracted from the aforementioned wastes in coloring some products such as ice cream instead of artificial or synthetic colorants which proved to be unsafe and not healthy to human health.
Publication year 2013
Pages 1083-1093
Organization Name
serial title Egypt. J. Agric. Res
Author(s) from ARC
Publication Type Journal
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