Effect of Dielectric Properties of a Solvent-Water Mixture Used in Microwave-Assisted Extraction of Antioxidants from Potato Peels
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Equipment and Apparatus
2.3. MAE Extraction
2.4. Preparation of Potato Peel Extracts
2.5. Determination of Total Phenolic Compounds
2.6. Statistical Analysis
3. Results and Discussion
3.1. Effect of Temperature on Dielectric Properties of Methanol-Water Mixtures
Dielectric Properties | Plant material | Frequency (MHz) | Equation obtained | R2 |
---|---|---|---|---|
ε′ | Potato peel | 2450 | 78.65 − 0.51 Met − 0.11 Temp | 0.91 |
ε″ | Potato peel | 2450 | 12.81 − 0.07 Temp | 0.26 |
ε′ | Without peel | 2450 | 80.39 − 0.54 Met | 0.98 |
ε″ | Without peel | 2450 | 19.48 − 0.20 Temp | 0.88 |
Dielectric Properties | Plant material | Frequency (MHz) | Equation obtained | R2 |
---|---|---|---|---|
ε′ | Potato peel | 915 | 80.38 − 0.44 Met − 0.15 Temp | 0.97 |
ε″ | Potato peel | 915 | 11.13 − 0.03 Met | 0.36 |
ε′ | Without peel | 915 | 86.68 − 0.49 Met − 0.13 Temp | 0.98 |
ε″ | Without peel | 915 | 8.60 + 0.012 Met − 0.096 Temp | 0.9 |
3.2. Effect of Temperature, Concentration and Presence of Plant Material on Dissipation Factor (tanδ)
Dissipation factor | Plant material | Frequency (MHz) | Equation obtained | R2 |
---|---|---|---|---|
tanδ | Potato peel | 915 | 0.12 + 0.00124 Met | 0.60 |
tanδ | Without peel | 915 | 0.11 + 0.00144 Met − 0.002 Temp | 0.91 |
tanδ | Potato peel | 2450 | 0.16 +0.005 Met − 0.003 Temp | 0.79 |
tanδ | withoutpeel | 2450 | 0.26 + 0.004 Met − 0.005 Temp | 0.95 |
3.3. Effect of Dielectric Properties of Methanol Fraction and Time on MAE Extraction of Antioxidant
4. Conclusions
Acknowledgments
Conflicts of Interest
References
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Singh, A.; Nair, G.R.; Liplap, P.; Gariepy, Y.; Orsat, V.; Raghavan, V. Effect of Dielectric Properties of a Solvent-Water Mixture Used in Microwave-Assisted Extraction of Antioxidants from Potato Peels. Antioxidants 2014, 3, 99-113. https://doi.org/10.3390/antiox3010099
Singh A, Nair GR, Liplap P, Gariepy Y, Orsat V, Raghavan V. Effect of Dielectric Properties of a Solvent-Water Mixture Used in Microwave-Assisted Extraction of Antioxidants from Potato Peels. Antioxidants. 2014; 3(1):99-113. https://doi.org/10.3390/antiox3010099
Chicago/Turabian StyleSingh, Ashutosh, Gopu Raveendran Nair, Pansa Liplap, Yvan Gariepy, Valerie Orsat, and Vijaya Raghavan. 2014. "Effect of Dielectric Properties of a Solvent-Water Mixture Used in Microwave-Assisted Extraction of Antioxidants from Potato Peels" Antioxidants 3, no. 1: 99-113. https://doi.org/10.3390/antiox3010099
APA StyleSingh, A., Nair, G. R., Liplap, P., Gariepy, Y., Orsat, V., & Raghavan, V. (2014). Effect of Dielectric Properties of a Solvent-Water Mixture Used in Microwave-Assisted Extraction of Antioxidants from Potato Peels. Antioxidants, 3(1), 99-113. https://doi.org/10.3390/antiox3010099