Extraction and Kinetic Model of Young Coconut Coir Tannin (Cocos nucifera L.) using the Pressurized Solid Liquid Extraction Method Nur Lailatul Rahmah*, Lucky Wiratama, Sukardi, Hendrix Yulis Setyawan
Agro-idustrial Technology Department, Faculty of Agricultural Technology, Universitas Brawijaya
Jalan Veteran, Malang 65145, East Java, Indonesia
*nur_laila[at]ub.ac.id
Abstract
Total production of plantation crops of coconut (Cocos nucifera L.) in Indonesia at 2024 was 2.822.120 tons and about 25% was coconut coir. Coconut coir is part of the coconut fruit that has not been utilized properly, especially its bioactive compound. Tannins are one of the bioactive compounds in coconut coir which are included in the polyphenol class. Tannin compounds have several functions, one of which is antioxidant. Extraction is a method that can be done to obtain tannins from coconut coir. This research was conducted using the pressurized liquid solid extraction method. The purpose of this study was to determine the effect of extraction time on yield, antioxidant content, levels of tannins produced and to determine the kinetic model of tannin extraction. The study used a randomized block design with 6 treatments of extraction time, namely 10, 15, 20, 25, 30, and 35 minutes and used water as solvent. Based on the research results, extraction time had a significant effect on the yield of the extracts, but the antioxidant and tannin levels had no significant effect. Highest yield and tannin content (28.02 mg TAE / g) were obtained at 35 minutes extraction time. The best antioxidant value was produced at 35 minutes extraction time with IC50 value was 11.85 ppm. Peleg^s model is the most appropriate model (R2 was 0.971) to describe tannin extraction using pressurized liquid solid extraction method with Peleg^s rate constant was 0.731 min g/mg TAE and Peleg^s capacity constant was 0.017 g/mg TAE compared to other models.
