GEL FILTRATION OF CONDENSED TANNINS AND PHENOLIC ACIDS OF CANOLA HULLS ON SEPHADEX G-25 AND G-50

Condensed tannins and phenolic acids were extracted from canola hulls into acetone-water (70:30; v/v) and fractionated using Sephadex G-25 and G-50 column chromatography with 50% (v/v) acetone as the mobile phase. Three fractions containing phenolic compounds were obtained from the extract using Sephadex G-25 and four using Sephadex G-50. The latter fractions eluted from the columns, packed with either gel, both gels were free of condensed tannins. The contents of total phenolics and condensed tannins were determined in the range of 52–280 mg/g, 0.198–1.153 A₅₀₀/mg (vanillin method), and 0.333–1.330 A₅₅₀ /mg (after n-butanol/HCl hydrolysis). The method described can be used as a step in the purification of condensed tannins of canola hulls before semi-preparative RP-18 HPLC column chromatography.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.