Optimization of Extraction Solvents on the Antioxidant Properties of Coconut Waste

Husna Filzah Ismail, Fazrena Nadia Md Akhir, Nor'azizi Othman, Hirofumi Hara
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Abstract

Cocos nucifera L. (family Arecaceae) commonly known as coconut is considered as an important fruit crop in tropical countries and are widely used for therapeutic and domestic purpose. They have effective properties such as antioxidant, antitumor, antiseptic and antimicrobial. The growing demand for green coconut water consumption and food industries cause the dumping of the shell and husk of this fruit, generating large amount of solid waste. This study utilized part of coconut waste to study the impacts of solvent type on the phenolic content. Six different polarities of solvent were chosen. Total phenolic content was performed using Folin-Ciocalteu assay and free radical scavenging activity with 2,2-diphenyl-1-picrilhydrazil (DPPH) method. Total phenolic content for coconut shell was the highest at 71.57 ± 0.275 mg GAE/g for propanol extract and 74.10 ± 0.741 mg GAE/g for acetone extract of coconut husk. The antioxidant activity of all sample extracts was analysed using DPPH assay. Highest radical scavenging activity of coconut husk was observed by propanol extract with 93.82 ± 0.052 % while the lowest scavenging activity was demonstrated by chloroform extract with percentage of 57.77 ± 2.255%. Acetone extract of the shell exhibited the highest scavenging activity of 91.23 ± 0.073%, while chloroform extract of coconut shell demonstrated the lowest antioxidant activity of 70.627 ± 0.467%.
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优化萃取溶剂对椰子废料抗氧化特性的影响
椰子科植物椰子(Cocos nucifera L.)俗称椰子,是热带国家的重要水果作物,被广泛用于治疗和家庭用途。椰子具有抗氧化、抗肿瘤、防腐和抗菌等功效。随着人们对绿色椰子汁消费和食品工业需求的不断增长,椰子壳和外皮被大量倾倒,产生了大量固体废物。本研究利用部分椰子废料来研究溶剂类型对酚类物质含量的影响。选择了六种不同极性的溶剂。总酚含量采用 Folin-Ciocalteu 分析法,自由基清除活性采用 2,2-二苯基-1-双氢齐(DPPH)法。椰子壳的总酚含量最高,丙醇提取物为 71.57 ± 0.275 mg GAE/g,椰子壳丙酮提取物为 74.10 ± 0.741 mg GAE/g。所有样品提取物的抗氧化活性均采用 DPPH 法进行分析。椰子壳丙醇提取物的自由基清除活性最高,为 93.82 ± 0.052%,而氯仿提取物的清除活性最低,为 57.77 ± 2.255%。椰子壳丙酮提取物的清除活性最高,为 91.23 ± 0.073%,而氯仿提取物的抗氧化活性最低,为 70.627 ± 0.467%。
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来源期刊
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences Chemical Engineering-Fluid Flow and Transfer Processes
CiteScore
2.40
自引率
0.00%
发文量
176
期刊介绍: This journal welcomes high-quality original contributions on experimental, computational, and physical aspects of fluid mechanics and thermal sciences relevant to engineering or the environment, multiphase and microscale flows, microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.
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