Nining Sugihartini

Physical properties and irritation index essential oil of clove (Syzigium aromaticum) in absorption base ointment with variation concentration

The essential oil of clove (Syzygium aromaticum) contains eugenol which has antiinflammatory activity. Development of the dosage form for this essential oil was needed to increase its acceptability. The aim of this study was to know the influence of concentration variations of the essential oil of Syzigium aromaticum in an absorption ointment base to the physical properties and irritation index of the ointment. The ointment was formulated by melting method. The concentrations of essential oil were 2,5% (FI), 5% (FII) and 10% (FIII), respectively. The ointment was evaluated for its physical properties (spreadability, adhesivity and pH) and irritation index. Data were analyzed by anovaone way with 95% confidence level. The results of this study showed that the concentration variation)of essential oil of Syzygium aromaticum influenced the physical properties except pH. The increasing concentration of essential oil of Syzygium aromaticum caused increasing spreadability and decreasingadhesivity. On the other h...

VALIDASI METODE ANALISA PENETAPAN KADAR EPIGALOKATEKIN GALAT DENGAN KROMATOGRAFI CAIR KINERJA TINGGI

High Performance Liquid Chromatography (HPLC) was one of analytical methods commonly used to determine the concentration of epigallocatechin gallate (EGCG) on green tea extract. The method must be validated in order to fit to its purpose. The aim of this research was to prove that the used method has selectifity, liniearity, precise, accurate and know limit of detection (LOD) and limit of quantification (LOQ) is acceptable. The selectivity of analytical method was determined by calculating the resolution value between two peak. Data from 10 μg/mL and 100 μg/mL with 5 replicates would give precition and accuration. Precition was known from CV value and accuration was known from recovery value in each concentration. Liniearity was known from regression linear between concentration and wide area of peak. From regresion linear could calculate LOD and LOQ. Research show that method of analyse have selectificity with Rs= 2.27>1.5; liniearity with r= 0.99; precision with CV 8.74% at concentration 200 µg/mL and 3.74% at concentration 500 µg/mL; accuration with recovery 99.76% at concentration 200 µg/mL and 100.52% at concentration 500 µg/mL and the value of LOD is 33.28 μg/mL and LOQ is 110.93 μg/mL.