Determination of SPF (Sun Protection Factor) Value of Lotion Preparation of Ethanol Extract of Akway Bark (Drymis Piperita Hook F.) of West Papua

Akway bark (Drymis piperita Hook f.) has antioxidant activity. It contains secondary metabolite compounds, one of which is flovonid so that it can be utilized as protection against UV rays and developed into pharmaceutical preparations, namely lotions. The aim of the study was to test the physical stability and determine the SPF value of lotion preparations of ethanol extract of akway bark analyzed in vitro. The test includes the determination of SPF value by UV-vis spectrophotometry method. The absorbance was measured at the wavelength of UV B light (290-320 nm) with an interval of 5 nm; the Mansur formula calculated the results obtained. The test results showed that The results of the stability test showed that the lotion preparation of akway bark extract was stable in organoleptic testing, elution type test, homogeneity test, the stickiness test, spreadability test, pH test, protective power test and the SPF value of lotions with concentrations of 0.5%, 1.0%, 1.5% obtained an average SPF value of 5.20 ± 0.00 in the medium protection category that protected the skin for 52 minutes; 11.52 ± 0.00 maximum protection that protected the skin for 115 minutes; and 5.20 ± 0.00 in the maximum protection category that protected the skin for 115 minutes. 16.00 ± 0.03 ultra protection will protect the skin for 160 minutes from UV B exposure. Thus, it can be concluded that the variation in concentration of akway bark extract affects the SPF value and can potentially be a sunscreen with moderate to ultra protection category.