Utami, Herti and Agustin, Veni Tri and Novirianti, Luthfiah and Darni, Yuli and Lesmana, Donny and Tagaki, Ryosuke (2021) The Leaching of Natural Dyes from Avocado (Persea americana Mill) Seeds Using the Ultrasonic-Assisted Extraction Method and Its Application on Cellulose Fibers. Jurnal Rekayasa Kimia dan Lingkungan, 16 (2). pp. 100-108. ISSN 1412-5064

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Abstract

The development of textiles in Indonesia grows steadily, which increases the use of synthetic dyes. Textile industry uses synthetic dyes because they are cheaper and easier to obtain. Moreover, the color availability is guaranteed and more varied. However, when introduced to the environment, these synthetic dyes have a negative impact on health. The natural dye from avocado (Persea americana Mill) seeds can become an alternative. Polyphenol compounds, such as tannins and flavonoids, are natural color sources found in avocado seeds. The extraction of natural dyes from avocado seeds can be done by using ultrasonic-assisted extraction which offer high efficiency and rapid processing. This study examined the parameters that affect the yield of dye extraction from avocado seeds, namely solvent concentration and extraction time. Qualitative analysis on the pigment content in the yield of extraction using UV-Visible Spectrophotometry and GC-MS were also done. The results indicated that the highest yield obtained from avocado seeds was 16.7% with 90 minutes extraction time using 70% ethanol solvent. Furthermore, if the dye is applied to cellulose fibers, such as the cotton cloth, the color changed depending on the fixator added. Based on the result of the UV-Visible Spectrophotometry test, the avocado seeds contain flavonoids. Meanwhile, the result of the GC-MS suggests the compound with the largest percentage detected in avocado seeds is the 13-Tetradecyno_ic acid, methyl ester (C15H26O2). The compound contains a chromophore, such as a carbonyl group (C = O) which is a common feature of flavonoids. Keywords: Avocado seeds, extraction, natural dyes, ultrasonic-assisted extraction

Item Type:	Article
Subjects:	T Technology > TP Chemical technology
Divisions:	Fakultas Teknik (FT) > Prodi Teknik Kimia
Depositing User:	Dr. Herti Utami
Date Deposited:	20 Jan 2022 03:28
Last Modified:	20 Jan 2022 03:28
URI:	http://repository.lppm.unila.ac.id/id/eprint/38067

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