FORMULASI DAN AKTIVITAS ANTIBAKTERI SABUN MANDI CAIR MINYAK ATSIRI SEREH WANGI (Cymbopogon winterianus) DENGAN SURFAKTAN COCAMIDE DEA (terhadap Bakteri Staphylococus aureus)

Background: Citronella contains citronellal, geraniol, and citronellol, which can inhibit the growth of Staphylococcus aureus bacteria. In this study, adding cocamide DEA as a non-ionic surfactant to bath soap can reduce irritation caused by anionic surfactants and can also affect the physicochemical characteristics of the soap preparation.
Objectives:To determine the effect of Cocamide DEA levels with concentrations of 2%, 4%, and 6% on the physicochemical characteristics of citronella essential oil soap with a concentration of 1% and to determine the antibacterial activity against Staphylococcus aureus.
Method:Cocamide DEA is formulated into soap in 3 formulas, namely FI (2%), FII (4%), and FIII (6%), with 1% citronella essential oil content in each formula. Physicochemical characteristic tests were carried out, including organoleptic, pH, viscosity, foam stability, and specific gravity. The antibacterial activity test was tested using the well method.
Results and Conclusions:Liquid soap preparations with 1% citronella essential oil content have antibacterial activity against Staphylococcus aureus. Organoleptic tests for FI (2%), FII (4%), and FIII (6%) showed results of yellowish-white color, bad smell, and homogeneous liquid form. From the results of the one-way Anova analysis, significant differences were found in the chemical tests, including pH, viscosity, foam stability, and specific gravity. In terms of antibacterial activity, the greater the concentration of cocamide DEA, the greater the inhibition zone for the growth of Staphylococcus aureus.