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IJSTR >> Volume 2- Issue 9, September 2013 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Tannin Extract Of Guava Leaves (Psidium Guajava L) Variation With Concentration Organic Solvents

[Full Text]



Meigy Nelce Mailoa, Meta Mahendradatta, Amran Laga, Natsir Djide



Index Terms: Tannin, Guava Leaves,Organic Solvents



Abstract: Research has been conducted to determine the levels of tannins in leaves of guava (Psidium guajava L) using a variation of the concentration of organic solvent. The method used for qualitative analysis with the tannins are formed by the intensity of the color is blackish green FeCl3 compounds. While the principle of quantitative determination of tannins is tanat acid standard curve at a wavelength of 724,5 nm. In the quantitative analysis of tannins used variations of organic solvent (ethanol and acetone with a concentration of 30%, 50%, 70%). Levels of tannins in the sample solution was calculated with Tannates Acid Equivalent (EAT). The results showed levels of tannins in leaves of guava with 30% ethanol, which is 3.228 mg/g, 50% is 2.970 mg/g, 70% is 2,333 mg/g. While the levels of tannins in guava leaves with 30% acetone solvent which is 2,781 mg/g, 50%: 2,738 mg/g, 70%: 2,405 mg/g.



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