TY  - JOUR
ID  - digilib7897
UR  - https://digilib.uin-suka.ac.id/id/eprint/7897/
A1  - IMELDA , FAJRIATI 
Y1  - 2006/10/01/
N2  - 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.
JF  - Kaunia Jurnal Sains dan Teknologi Vol. II , No. 2, Oktober 2006
KW  - tannin
KW  -  o-phenantrolin
KW  -  spektrophototneter UV-Vis.
TI  - OPTIMASI METODE PENENTUAN TANIN (Analisis Tanin secara Spektrofotometri dengan Pereaksi Orto-Fenantrolin)
AV  - public
ER  -