OPTIMASI METODE PENENTUAN TANIN (Analisis Tanin secara Spektrofotometri dengan Pereaksi Orto-Fenantrolin)

IMELDA , FAJRIATI (2006) OPTIMASI METODE PENENTUAN TANIN (Analisis Tanin secara Spektrofotometri dengan Pereaksi Orto-Fenantrolin). Kaunia Jurnal Sains dan Teknologi Vol. II , No. 2, Oktober 2006.

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Abstract

Tannin is a chemical compound found most plants. Its existence creates sour and astringent to the taste of some fruits. Nevertheless, tannin has some advantages in tannin leather industry and the health of digestion system, such as to cure diarrhea. The proposed methode was applied succesfully to the determination of tannin by composing the complex compound of stabile red solution of iron(ll)-orto phenantrolin. Tannin can reduce iron(LII) to iron(II) after heating up to S(fC for 20 minutes' The iron mil then react with orto-phenantroline, forming a complex of iron(ll)-orto phenantroline which absorb visible light having wavelenght 400- 700 nm. The result of this study shows that the maximum absorbance is found for 505 nm waveknghtt the optimum pH is 5,5; the optimum heating time is 20 minutes. It is also found that the existence ofascorbat acid over 0,5 ppm will interfere the tannin analysis, leading to a necessity to isolate it prior to the analysis.

Item Type: Article
Uncontrolled Keywords: tannin, o-phenantrolin, spektrophototneter UV-Vis.
Subjects: Kaunia Jurnal
Divisions: E-Journal
Depositing User / Editor: Edi Prasetya [edi_hoki]
Date Deposited: 28 May 2013 15:07
Last Modified: 28 May 2013 15:07
URI: http://digilib.uin-suka.ac.id/id/eprint/7897

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