PEMURNIAN MINYAK AKAR WANGI (Vetiveria zizanioides) MENGGUNAKAN BENTONIT TERAKTIVASI DENGAN VARIASI KONSENTRASI ASAM SITRAT (C6H8O7) DAN SUHU ADSORPSI
Main Article Content
Abstract
Vetiver oil is one of the essential oils with high economic value and various benefits, including applications in perfume, cosmetics, soap industries, anti-inflammatory, antibacterial, and insecticidal uses. However, the potential benefits are not aligned with its quality, due to the high temperatures in the steam distillation extraction method, which results in a burnt aroma and dark oil color. This study aimed to identify the quality of purified vetiver oil using citric acid-activated bentonite, as well as to determine the most effective treatment to improve the quality of vetiver oil in accordance with SNI 06-2386-2006 through adsorption at citric acid concentrations of 4%, 6%, and 8%, and adsorption temperatures of 35°C and 55°C. The best treatment was the combination of citric acid 4% at 35°C adsorption temperature, which increased the specific gravity from 0,868 to 0,891 and reduced the acid value from 35,06 to 28,05. The oil also showed a color change from reddish-brown to light-yellow with a characteristic of vetiver aroma, although it did not dissolve in ethanol. SEM-EDX analysis confirmed that the bentonite activation was successful, leading to effective adsorption. GC-MS analysis detected 103 compounds in both untreated and best-treated oil, with the main compound ((3S,3aR,6R,8aS) - 7, 7 – Dimethyl – 8 – methyleneoctahydro - 1H - 3a, 6 – methanoazulen – 3 - yl) methanol remained dominant after purification with an increase in vetiverol from 60,82% to 88,08%.
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