The Karo's farmers use the plant as a substitute for water and soap called acem acem (Oxalis dehradunensis Raizada) leaves to clean the direct pesticide exposure at their skin. This study was aimed to determine the effective formula of Oxalis dehradunensis Raizada leaves extract as hand soap gel preparation to remove pesticide residues. The experimental research was conducted to explore the potential of the leaves as an alternative material for pesticide cleaner. It is a pre and post experiment that was tried by 30 farmers from Karo district, Indonesia. The material used fresh Oxalis dehradunensis Raizada leaves, collected from farmer's fields. The extract was gained from the leaves powder was repeatedly extracted by maceration. All farmers used a pesticide with chlorpyrifos content and wash their hands by using handsoap gel extract ethanol Oxalis dehradunensis Raizada formula. The water of the farmer's hand wash was check-in the laboratory for screened phytochemicals. The data were analyzed in quantitative and gas chromatography to find the ability of the extract to remove chlorpyrifos pesticide residues, in the farmer's hand wash water as a qualitative test. The results found that Oxalis dehradunensis Raizada was formulated into hand soap gel could remove chlorpyrifos pesticide residue from hand wash of the farmers. The ability of hand soap gel with Oxalis dehradunensis Raizada concentration of 5% and 7% in binding residue compounds of chlorpyrifos pesticides was considered good. It concluded the Oxalis dehradunensis Raizada leaves are effective to clean the pesticide residues.
Keywords: Extract; Oxalis dehradunensis Raizada; hand soap gel; leaves; pesticide cleaner.
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