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All Journal Jurnal Farmasi Higea
Mahyuddin Mahyuddin
Fakultas Farmasi Universitas Andalas Padang
Medicine & Pharmacology

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Karakterisasi Flavonoid Antioksidan Dari Daun Jambu Biji (Psidium guajava L.) Harrizul Rivai; Lisa Putriani; Mahyuddin Mahyuddin
Jurnal Farmasi Higea Vol 2, No 2 (2010)
Publisher : STIFARM Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.704 KB) | DOI: 10.52689/higea.v2i2.34

Abstract

Flavonoid compounds have been isolated from guajava leaf from 100 grams of dried samples of guava leaf  were obtained liquid extract 130 mL, n-hexane fraction as much as 1.65 g, 1.95 g of chloroform fraction, fraction of 1.87 g ethyl acetate, butanol fraction of 2.15 g, and the remaining fraction as much as 28.96 g and flavonoid A as much as 36.9 mg. Flavonoid A is a yellow amorph form and decompose at a temperature of 190-192 C. Based on ultraviolet spectrum with various reagents shear and infrared spectrum, these compounds are known as flavonol-3-O-diglukosida. Flavonoids A provide antioxidant activity with the percent inhibition of 85.364% ± 0.2073%, while the flavonoid B 68.160%, ± 0.2073.
Analisis Pemanis Sintesis Natrium Sakarin Dan Natrium Siklamat Dalam Teh Kemasan Roslinda Rasyid; Melly Yohana; Mahyuddin Mahyuddin
Jurnal Farmasi Higea Vol 3, No 1 (2011)
Publisher : STIFARM Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (281.091 KB) | DOI: 10.52689/higea.v3i1.45

Abstract

It has been studied analysis of the synthetic sweetener sodium saccharin and sodium cyclamate in the tea drink. Synthetic sweetener were identified by color reactions and microcrystalline test. The result were compared with standard substances. Of the four samples examined here are three samples contain sodium cyclamate, while one other sample not find the content of sodium cyclamate and sodium saccharin. Levels of sodium cyclamate in the sample were determined by uv-vis spektofotometer.These levels are below the limit determined by Health Minister’s Regulation of Indonesian Republic which is 0.3 % for the soft drink.
Co-Authors Harrizul Rivai Lisa Putriani Melly Yohana Roslinda Rasyid