Tannins Extraction of Tea Leaves by Ultrasonic Method: Comparison with The Conventional Method

Rahman, Herliati and Arini, Shafira Fildza and Utomo, Vredyta (2020) Tannins Extraction of Tea Leaves by Ultrasonic Method: Comparison with The Conventional Method. Jurnal Teknologi, 8 (1). pp. 84-95. ISSN 2654-8666

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Abstract

Tannin is a compound of polyphenols derived from plants found in tea leaves (Camellia sinensis). Generally, the tannins are separated from the tea leaves using conventional methods of solvent extraction. Unfortunately, the said method resulted in an unsatisfactory yield because High risk of degradation of compounds, so it needs to carry out another way to overcome this matter, namely the ultrasonic solvent extraction method. This research aims to learn the effect of ultrasonic on the increase of tannins yield of extraction and to searched constant kinetic. This research has studied some of the parameters that affect the ultrasonic extraction result. These include the effect of extraction time and the type of tea leaves used from three different altitude areas from the sea level, such as Ciwidey Bandung, Pagar Alam, and Bogor Peak. The extraction time used is 4, 6, and 8 hours where the ultrasonic frequency at 75 kHz with a 70% ethanol solvent. Products containing tannins are analyzed qualitatively and quantitatively. Qualitative tannins content is tested with FeCl3 and Gelatin, while quantitative analysis uses spectrophotometer UV-vis Shimadzu UV 1800. Besides that, the Scanning Electron Microscopy (SEM) characterization confirmed that the ultrasonic method effect on increasing yield. The highest result is on the type of Pagar Alam tea at 8 hours extraction time, 23.1% of yield, which is 1% higher than the conventional method. The constant kinetic of ultrasonic extraction tea from Bandung was 0,0567 kg/m3.h.

Item Type:	Article
Subjects:	T Technology > TP Chemical technology
Divisions:	Fakultas Teknik Industri > S1-Teknik Kimia
Depositing User:	Mrs Herliati Rahman
Date Deposited:	21 Jan 2021 04:45
Last Modified:	21 Jan 2021 04:45
URI:	http://repo.jayabaya.ac.id/id/eprint/169

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