Modelling of bioactive components extraction from corn seeds

• Published in: Chemical engineering research & design Vol. 175; pp. 339 - 347
• Main Authors: Raimundini Aranha, Ana Caroline, de Matos Jorge, Luiz Mario, Nardino, Danielli Andrea, Casagrande Sipoli, Caroline, Suzuki, Rúbia Michele, Dusman Tonin, Lilian Tatiani, Oliveira Defendi, Rafael
• Format: Journal Article
• Language: English
• Published: Rugby Elsevier B.V 01-11-2021; Elsevier Science Ltd
• Subjects: Antioxidants; Biological activity; Corn; Ethanol; Extraction; Extraction processes; Free radicals; Gallic acid; Grain; Kinetics; Mathematical models; Methanol; Nutrition; Quantitative analysis; Scavenging; Seeds; Selectivity; Solvents; Antioxidants; Extraction; Mathematical models; Kinetics
• ISSN: 0263-8762; 1744-3563
• DOI: 10.1016/j.cherd.2021.09.021

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•The objective of this work was to adjust extraction kinetic models.•Antioxidant activity of extracts was analysed by DPPH free radical scavenging method.•Best results were noted for methanol/water 70/30 (v/v) at 1 and 4 h of extraction.•Kinetic data were well described by So and MacDonald’s and First Order models.
Corn is the most widely cultivated grain worldwide, due to its employability in human and animal nutrition. This grain has bioactive compounds with high pharmacological benefits. Several traditional techniques for extracting bioactive compounds from plant matrices involve solid-liquid extraction, commonly dynamic maceration. The main factors that can influence the yield and selectivity of this extraction are: solvent, time, temperature, solid-liquid ratio and particle size of material. In this context, extraction kinetic models have been applied to simulation and design studies. The objective of this work was to adjust extraction kinetic models based on experimental data of bioactive compounds extracted from corn seeds. In this way, solvents used were methanol/water 70/30 (v/v), methanol/water 95/5 (v/v), ethanol/water 70/30 (v/v) and ethanol/water 95/5 (v/v) and the extraction times were 1, 4 and 24 h. Extraction efficiency was monitored by the DPPH free radical scavenging test, using gallic acid as a standard. Best results were obtained with the solvent methanol/water 70/30 (v/v) during 1 and 4 h of extraction. Kinetic models that best fitted experimental data were First Order and So and MacDonald’s, while those that could not present good statistical analyzes were Parabolic Diffusion and Power Law.