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Optimization Extraction of Anthocyanin from Roselle as a Natural Colorant using Natural Deep Eutectic Solvent with Microwave Assisted Extraction Method

1Departement of Industrial Technology, Universitas Diponegoro, Jl. Gubernur Mochtar, Tembalang, Semarang, Indonesia 50275, Indonesia

2Departement of Chemical Engineering, Universitas Diponegoro, Jl. Prof. Soedarto SH, Semarang, Indonesia 50275, Indonesia

Received: 10 Apr 2025; Revised: 11 Jun 2025; Accepted: 12 Jun 2025; Available online: 18 Jun 2025; Published: 30 Jun 2025.
Open Access Copyright (c) 2025 by Authors, Published by Vocational College of Universitas Diponegoro under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract
This study aims to extracted of roselle using Microwave Assisted Extraction (MAE) with Natural Deep Eutectic Solvent (NADES) combination of sodium acetate and glycerin then examining its effect on the optimum anthocyanin content. The variables were applied using microwave assisted extraction power (200; 400; 600 watt), and extraction time (4; 6; 8 minutes). The variables were optimized using the response surface methodology (RSM) of 12 runs. The analysis includes antioxidant content (anthocyanins, vitamin C, tannins, and total phenolics) and stability tests (density and viscosity). The RSM results have shown that the optimization value of anthocyanin content is 0.3217%, which will be achieved at a extraction time of 6.02 minutes, and microwave assisted extraction power at 323.77 watt. The result of running the optimum anthocyanin variable shows anthocyanin content is 0.3072%. Microwave assisted extraction power and extraction time shown a significant effect on the antioxidant content.
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Keywords: Roselle; Anthocyanin; NADES; MAE; Response Surface Methodology

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