Extracting carotenoids pigments from citrus peel and studying their functional properties

الملخص EN

This study was conducted in the graduate laboratories of the Department of Food Science at the College of Agriculture and the Chemistry Department at the College of Education for Pure Sciences at the University of Tikrit and included the extraction of carotenoids pigments from citrus peel (Turkish orange peel, Iraqi orange peel, Turkish Tangerine peel, Iraqi Tangerine peel , Iraqi Bitter orange peel).

The study showed that the Turkish orange peel was characterized by moisture, ash, protein, fat and carbohydrates by 72.5%, 4.6%, 5.7%, 0.26% and 16.58%, respectively.

While Iraqi orange peel in its carbohydrate content was 19.24%.

The Turkish orange peel was the best in the extraction of dyes compared to the rest of the samples by carotenoids of 3.57 mg /L.

The petroleum ether was distinguished on both distilled water and ethanol in extraction.

The results showed.

also the extraction ratio (10: 1) (weight: volume) at 30 ° C and 72 ° extraction time and only two extraction times, all IR, UV and HPLC techniques were used to diagnose dyes and identify substances in citrus peel extracts, and to use some chemical reagents to diagnose the active compounds found in these extracts and all samples studied.

It was found that the retention percentage of the organic extract in dyes increased in the neutral and basal medium and increased the degradation of dyes in the acid medium.

The highest retention rate of 98.57% was recorded at pH 7.

The results showed that the use of natural antioxidant alpha-tocopherol was better than the use of industrial antioxidant BHT In the conservation of pigments, and showed the diagnosis of organic extracts, alcohol and water technology HPLC contain: apo-B-cartene-10-ols, Dihdroxy epoxides, 10 -apo-B-cartene-10-als, - 10 ) apo-B-cartene-10-al, 8-apo-B-cartene-10-Ol, Zeaxanthin, B-cryptoxathin) - 8 The use of HPLC showed that the organic extract is the highest in the percentage of for containing these pigments.

Some chemical reagents showed that the three extracts (organic, water, alcoholic) were contained in the studied samples: (Flavonoids, steroids, phenols, resins, alkaloids, Saponins , tannins, volatile oils, Comarin and GIycosides).