EXTRACTION OF TANNIN FROM CASHEW TRUNK
Abstract
Tannins are naturally occurring polyphenolic compounds known for their antioxidant, antimicrobial, and astringent properties, making them valuable in pharmaceutical, food, cosmetic, and industrial applications. This study investigated the extraction of tannin from the trunk of the cashew tree (Anacardium occidentale) using an aqueous extraction method. Cashew trunk samples were collected, dried, pulverized, and subjected to solvent extraction. The tannin content of the extract was quantified using a tannic acid standard curve, with absorbance measured spectrophotometrically. The results showed that the tannin concentration in the working solution of the cashew trunk extract was 0.828 mg/mL at an absorbance value of 0.25. These findings demonstrate that cashew trunk is a viable source of tannins and that aqueous extraction can effectively isolate tannins, although extraction efficiency may vary depending on solvent type and extraction conditions. The study highlights the potential of cashew trunk as a sustainable raw material for tannin production and provides a basis for further optimization of extraction techniques to improve yield and industrial applicability.
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