| Issue |
BIO Web Conf.
Volume 104, 2024
The 3rd and 4th International Conference on Bioenergy and Environmentally Sustainable Agriculture Technology (ICoN BEAT 2022 and 2023)
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|
|---|---|---|
| Article Number | 00043 | |
| Number of page(s) | 8 | |
| DOI | https://doi.org/10.1051/bioconf/202410400043 | |
| Published online | 01 May 2024 | |
Effect Solvent and Extraction Method on the Characteristics of Green Bean Robusta Coffee
1 Department of Food Technology, University of Muhammadiyah Malang, Jl. Raya Tlogomas No. 246, Malang 65144, East Java, Indonesia
2 Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, Gakuen Konohanadai Nishi 1-chome, Zip: 889-2192, Miyazaki, Miyazaki, Japan
* Corresponding author: sriwinarsih26@gmail.com
One of the chemical elements found in coffee is caffeine, which is the second-largest secondary metabolite after chlorogenic acid. Robusta coffee has a higher caffeine content than Arabica. Low-caffeine coffee is an alternative choice for people who are aware to negative effects of caffeine. Process caffeine reduction was carried out in this reseerach by using the maceration method, soxhletation and microwave exposure with dichloromethane, ethyl acetate and water as solvents. Soxhletationee caffeine content was originally 2.2 % after caffeine was extracted using the soxhletation method using 15 % ethyl acetate solvent, coffee caffeine content was 0.87 %, antioxidant activity (IC 50) was 1 867 mg L-1, total flavonoids were 420.3 mg L-1, lightness 45.7, redness is 2.3 and yellowness 10. The reduction of caffeine content in coffee beans is influenced by the method and duration of extraction as well as the solvent used to dissolve the caffeine.
Key words: Antioxidant activity / Coffea canephora Pierre ex A. Froehner / decaffeinated coffee / flavonoid / healthy drink.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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