Optimization of low-methoxyl pectin extraction from durian rinds and its physicochemical characterization

Jong, Sze Hui and Abdullah, Norazlin and Muhammad, Norhayati (2023) Optimization of low-methoxyl pectin extraction from durian rinds and its physicochemical characterization. Carbohydrate Polymer Technologies and Applications, 5. pp. 1-13. ISSN 100263

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Abstract

The current study investigates the influence of acid-heating extraction conditions on durian rind pectin yield and properties. A central composite rotatable design was employed to study the effect of extraction temperature (75 – 95 ◦C), duration (30 – 270 min), and solid-to-liquid ratio (S:L) (1:20 – 1:60 g/mL) at 0.001M H2SO4 on durian rind pectin yield, esterification degree (DE), and purity (AUA). Based on the results, pectin yield and AUA were significantly affected by extraction temperature, time, and S:L. Among them, extraction temperature was the most significant variable positively affecting the pectin yield and purity. DE was not pronouncedly influenced by extraction temperature, time, and S:L. Under the optimal extraction condition (93.3 ◦C, S:L 1:50 g/mL, 185 min), the experimental yield (12.12%) and AUA (77.21%) of the extracted pectin were in close agreement with the predicted values. The optimized pectin had DE = 18.99% and molecular weight = 42.12 kDa. The FT-IR spectrum showed that DP is rich in polygalacturonic acid. DP powders were homogenous slab-like granules with smooth surfaces and had relatively good thermal properties. Thus, durian rind is a potential source of low methoxyl pectin, which could be a capable thickener for low-calorie foods and beverages.

Item Type: Article
Uncontrolled Keywords: Pectin Durian rind Extraction Central composite design Yield Purity Esterification degree
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Applied Science and Technology > Department of Mathematics and Statistics
Depositing User: Mr. Mohamad Zulkhibri Rahmad
Date Deposited: 16 May 2023 02:28
Last Modified: 16 May 2023 02:28
URI: http://eprints.uthm.edu.my/id/eprint/8705

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