Formulation and characterization of natural deep eutectic solvents (NADES) for simultaneous phenolics and carotenes extraction from fresh oil palm leaf

IF 3.5 2区 农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Food and Bioproducts Processing Pub Date : 2024-08-08 DOI:10.1016/j.fbp.2024.07.023
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Abstract

In this study, natural deep eutectic solvents (NADES), comprising choline chloride (ChCl) as hydrogen bond acceptor (HBA) with hydrogen bond donor (HBD) including glucose (Glu), fructose (Fru), xylose (Xyl), xylitol (Xyli), and glycerol (Gly), were formulated and characterized for simultaneous extraction of phenolic compounds (polar) and carotenoids (non-polar) from fresh oil palm leaves (OPL). pH, density, polarity, Fourier Transform Infrared Spectroscopy (FT-IR) and rheological analyses were conducted, with relation to the extraction efficiency achieved via homogenizer-assisted heating and stirring extraction approach. Among the NADES formulations tested, ChCl:Xyl (1:1) displayed the highest total phenolic content (TPC) at 20.23825 mg/g OPL, due to its optimal polarity at 49.4654 kcal mol1 and a viscosity of 23288 mPa.s. The highest total carotenoid content (TCC) was observed in ChCl:Xyli (1:1) at 325.94 µg/g OPL, with a lower polarity at 50.0280 kcal mol1. Despite having similar viscosity and polarity, ChCl:Fru (1:2) with a pH of 5.82 outperformed ChCl:Glu (1:1) with a pH of 6.72 due to enhanced phenolic compound solubility and stability. This study shed light on the potential of NADES, particularly in overcoming the challenge of high moisture content in OPL and other fresh biomasses, which often acted as a barrier during phytonutrients extraction.

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天然深共晶溶剂(NADES)的配制和表征,用于从新鲜油棕叶中同时提取酚类和胡萝卜素
本研究配制了天然深共晶溶剂(NADES),其中氯化胆碱(ChCl)为氢键受体(HBA),氢键供体(HBD)包括葡萄糖(Glu)、果糖(Fru)、木糖(Xyl)、木糖醇(Xyli)和甘油(Gly),并对其进行了表征,用于从新鲜油棕叶(OPL)中同时萃取酚类化合物(极性)和类胡萝卜素(非极性)。对 pH 值、密度、极性、傅立叶变换红外光谱(FT-IR)和流变学进行了分析,并将其与通过均质机辅助加热和搅拌萃取方法实现的萃取效率联系起来。在测试的 NADES 配方中,ChCl:Xyl(1:1)的总酚含量(TPC)最高,为 20.23825 mg/g OPL,这是因为其极性最佳,为 49.4654 kcal mol-1,粘度为 23288 mPa.s。尽管粘度和极性相似,但 pH 值为 5.82 的 ChCl:Fru (1:2) 优于 pH 值为 6.72 的 ChCl:Glu (1:1),原因是酚类化合物的溶解度和稳定性都有所提高。这项研究揭示了 NADES 的潜力,尤其是在克服 OPL 和其他新鲜生物质中高水分含量的挑战方面。
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来源期刊
Food and Bioproducts Processing
Food and Bioproducts Processing 工程技术-工程:化工
CiteScore
9.70
自引率
4.30%
发文量
115
审稿时长
24 days
期刊介绍: Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.
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