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Molecules 2017, 22(10), 1656; doi:10.3390/molecules22101656

Comparison of the Effectiveness of Water-Based Extraction of Substances from Dry Tea Leaves with the Use of Magnetic Field Assisted Extraction Techniques

1
Department of Bioenergetics and Food Analysis, Faculty of Biology and Agriculture, University of Rzeszów, 35-601 Rzeszów, Poland
2
Department of Food Technology and Human Nutrition, Faculty of Biology and Agriculture, University of Rzeszów, 35-601 Rzeszów, Poland
3
Wrocław University of Environmental and Life Sciences, Faculty of Biotechnology and Food Science, Department of Fruit, Vegetable and Plant Nutraceutical Technology, 37 Chełmonskiego Street, 51-630 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 29 September 2017 / Accepted: 29 September 2017 / Published: 3 October 2017
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Abstract

This article presents the findings of a study investigating the feasibility of using a magnetic field assisted technique for the water-based extraction of mineral components, polyphenols, and caffeine from dry black and green tea leaves. The authors present a concept of applying constant and variable magnetic fields in the process of producing water-based infusions from selected types of tea. Analyses investigating the effectiveness of the proposed technique in comparison with conventional infusion methods assessed the contents of selected mineral components—i.e., Al, Ca, Cu, K, Mg, P, S, and Zn—which were examined with the use of ICP-OES. The contents of caffeine and polyphenolic compounds were assessed using the HPLC. A changing magnetic field permitted an increased effectiveness of extraction of the mineral components, caffeine, and polyphenols. The findings support the conclusion that a changing magnetic field assisted extraction method is useful for obtaining biologically valuable components from tea infusions. View Full-Text
Keywords: water-based extraction; tea; magnetic field; chemical profile; polyphenols; caffeine water-based extraction; tea; magnetic field; chemical profile; polyphenols; caffeine
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MDPI and ACS Style

Zaguła, G.; Bajcar, M.; Saletnik, B.; Czernicka, M.; Puchalski, C.; Kapusta, I.; Oszmiański, J. Comparison of the Effectiveness of Water-Based Extraction of Substances from Dry Tea Leaves with the Use of Magnetic Field Assisted Extraction Techniques. Molecules 2017, 22, 1656.

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