Effect of Temperature and Solvent Type on Tannin Content Extracted from Mangosteen Peels, Rambutan Peels, Tea Leaves and Earleaf acacia Leaves
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Abstract
Tannin extraction from fruit peels and leaves of plants is an alternative way to utilize plant parts. The extracted tannins can be used in industries such as pharmaceutical, food, cosmetic and fabric dyeing industries. This research aimed to study the effect of temperature and solvent type on tannin content extracted from mangosteen peels, rambutan peels, tea leaves and earleaf acacia leaves. For the study of the effect of temperature on the extracted tannin content, the plant materials of the study, 0.10 g each, were dissolved in 20 mL of distilled water and extracted by heating for 180 min at 30, 40, 50, 60 or 70°C. From the experiment, it was found that the tannin content extracted from all studied plant materials increased depending on the extraction temperature. For the study of the effect of solvent type on the extracted tannin content, the plant materials of the study, 0.10 g each, were dissolved in 20 mL of distilled water or 95% ethanol and then extracted by heating for 180 min at 70°C. From the experiment, it was found that using ethanol as an extraction solvent for extracting all plants used in the study resulted in higher tannin content than using distilled water as an extraction solvent. The extraction of tea leaves with ethanol at 70°C for 180 min yielded the highest tannin content of 453.43 g tannin per kg of dry tea leaves. This study demonstrated that temperature and solvent type affected tannin content extracted from plant materials.
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บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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