Comparision of bioactive properties and phenolic comounds of the aerial parts of mountain tea (Sideritis phrygai Bornm) treated by Ultrasonic and Water-Bath extraction systems at different temperature and times

Authors:

 

Havvanur Yılmaz, Nurhan Uslu, Mehmet Musa Özcan

 

Volume 29, Issue 3;
Pages: 155-161; 2023
ISSN: 2069-0053 (print), Agroprint;
ISSN (online): 2068-9551

Abstract:

Sideritis species are known as “mountain tea” in Turkey and are widely used as herbal tea. Total flavonoid amounts of the extracts of mountain tea treated by sonication and water-bath syatms at 90 oC and different times were recorded between 65.24 (6min) and 68.01 mg QE/g (9 min) to 63.79 (9 min) and 66.99 mgQE/g (6 min), respectively. Total phenolic values of the extracts of mountain tea extracted by sonication at 25,80 and 90 oC at different times were determined between 11.88 (3 min) and 12.60 mgGAE/g (9min), 9.74 and 16.34 mg GAE/g (6 mn) and 11.60 (3 min) and 16.62 mg GAE/g (9 min), respectively. Antioxidant activities of the mauntain tea extracts obtained by sonication system at 25,80, 90 oC and different times (3,6,9 min) were measured  between 3.67 (9 min) and 4.28 mmol/kg (3 min), 3.36 (6 min) and 3.75 mmol/kg (9 min) and 4.06 (9 min) and 4.21 mmol/kg (3 min), respectively. Rutin, catechin, caffeic acid, syringic acid, p-coumaric acid, ferulic acid, 3,4-dihydroxybenzoic acid were the main phenoliccompunds of mountain tea extracts obtained by sonication and water-bath systems. Rutin amounts of the extracts of mountain tea extracted by sonication and water-bath systems depending on extraction temperatures and times were identified between 39.49 (25 oC for 3 min) and 98.57 mg/100g (80 oC for 6 min) to 81.99 (90 oC for 9 min) and 544.23 mg/100g (90 oC for 3 min), respectively. In general, the highest routine values were found in the samples extracted in water-bath at 25 and 80 oC.

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