Influence of ultrasound-assist and classical extractions on total phenolic, tannin, flavonoids, tocopherol and antioxidant characteristics of Teucrium polium aerial parts

Autor: Reza Farahmandfar, Tahmineh Bakhshandeh, Maryam Asnaashari
Rok vydání: 2019
Předmět:
Zdroj: Journal of Food Measurement and Characterization. 13:1357-1363
ISSN: 2193-4134
2193-4126
DOI: 10.1007/s11694-019-00051-5
Popis: Bioactive compounds, antioxidant activity and extraction yield of Teucrium polium aerial parts by different concentrations of aqueous and alcoholic solvents [water, ethanol and ethanol:water (50:50)] were investigated by ultrasonic and maceration. The total phenolic, tocopherol, tannin, flavonoid content and antioxidant activity (200–1200 ppm) of the extracts were determined and compared with butylated hydroxyanisol (BHA) (as a synthetic antioxidant) by DPPH· assay, β-carotene/linoleic bleaching inhibition and OSI methods. The results showed that the highest extraction yield (40.26%) and total phenolic (65.74 mg/g), tocopherol (112.13 µg/mL), tannin (5.90 mg/g) and flavonoid (5.60 mg/g) content were observed in ethanol:water (50:50) ultrasonic extraction. Moreover, as the highest bioactive components extracted by ethanol:water (50:50) ultrasonic methods, it signified that the highest radical scavenging activity with 91.45% and β-carotene/linoleic bleaching 84.14% inhibition at 1200 ppm of the extract which is higher than BHA (200 ppm) with 88.31% DPPH· radical scavenging activity and 76.83% inhibition in β-carotene/linoleic bleaching assay. Furthermore, addition of water as the safe, available and inexpensive solvent increased efficiency of ethanol.
Databáze: OpenAIRE
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