Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment
The aim of this study was to find the optimum condition of pulsed electric field (PEF) and intense pulsed light (IPL) for the enhancement of subcritical water extraction (SWE), which is an eco-friendly extraction method, for extracting tea catechins from green tea leaves (<i>Camellia sinensis&...
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MDPI AG
2021-12-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/10/12/3092 |
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| author | Hee-Jeong Hwang Yu-Gyeong Kim Myong-Soo Chung |
| author_facet | Hee-Jeong Hwang Yu-Gyeong Kim Myong-Soo Chung |
| author_sort | Hee-Jeong Hwang |
| collection | DOAJ |
| description | The aim of this study was to find the optimum condition of pulsed electric field (PEF) and intense pulsed light (IPL) for the enhancement of subcritical water extraction (SWE), which is an eco-friendly extraction method, for extracting tea catechins from green tea leaves (<i>Camellia sinensis</i>). The leaves were treated with PEF under conditions of electric field strength (1, 2 and 3 kV/cm) during 60 s. Moreover, IPL was applied at various voltages (800, 1000, and 1200 V) for 60 s. The SWE was performed for 5 min at varying temperatures (110, 130, 150, 170, and 190 °C). The maximum yield of total catechin was 44.35 ± 2.00 mg/g dry green tea leaves at PEF treatment conditions of 2 kV/cm during 60 s, as well as the SWE temperature of 130 °C. In the case of IPL treatment, the largest amount of total catechin was 48.06 ± 5.03 mg/g dry green tea leaves at 800 V during 60 s when the extraction temperature was 130 °C. The total catechin content was increased by 15.43% for PEF and 25.09% for IPL compared to the value of untreated leaves. This study verified that PEF and IPL had a positive effect on the enhancement of tea catechins extraction from green tea leaves using SWE. |
| first_indexed | 2024-03-10T04:07:54Z |
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| id | doaj.art-13ad854ac04b45ab8a86fb6244f88402 |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T04:07:54Z |
| publishDate | 2021-12-01 |
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| series | Foods |
| spelling | doaj.art-13ad854ac04b45ab8a86fb6244f884022023-11-23T08:18:42ZengMDPI AGFoods2304-81582021-12-011012309210.3390/foods10123092Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) PretreatmentHee-Jeong Hwang0Yu-Gyeong Kim1Myong-Soo Chung2Research Institute of Biotechnology and Medical Converged Science, Dongguk University, Seoul 10326, KoreaDepartment of Food Science and Engineering, Ewha Womans University, Seoul 03760, KoreaDepartment of Food Science and Engineering, Ewha Womans University, Seoul 03760, KoreaThe aim of this study was to find the optimum condition of pulsed electric field (PEF) and intense pulsed light (IPL) for the enhancement of subcritical water extraction (SWE), which is an eco-friendly extraction method, for extracting tea catechins from green tea leaves (<i>Camellia sinensis</i>). The leaves were treated with PEF under conditions of electric field strength (1, 2 and 3 kV/cm) during 60 s. Moreover, IPL was applied at various voltages (800, 1000, and 1200 V) for 60 s. The SWE was performed for 5 min at varying temperatures (110, 130, 150, 170, and 190 °C). The maximum yield of total catechin was 44.35 ± 2.00 mg/g dry green tea leaves at PEF treatment conditions of 2 kV/cm during 60 s, as well as the SWE temperature of 130 °C. In the case of IPL treatment, the largest amount of total catechin was 48.06 ± 5.03 mg/g dry green tea leaves at 800 V during 60 s when the extraction temperature was 130 °C. The total catechin content was increased by 15.43% for PEF and 25.09% for IPL compared to the value of untreated leaves. This study verified that PEF and IPL had a positive effect on the enhancement of tea catechins extraction from green tea leaves using SWE.https://www.mdpi.com/2304-8158/10/12/3092subcritical water extractionpulsed electric fieldintense pulsed lightgreen teatea catechins |
| spellingShingle | Hee-Jeong Hwang Yu-Gyeong Kim Myong-Soo Chung Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment Foods subcritical water extraction pulsed electric field intense pulsed light green tea tea catechins |
| title | Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment |
| title_full | Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment |
| title_fullStr | Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment |
| title_full_unstemmed | Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment |
| title_short | Improving the Extraction of Catechins of Green Tea (<i>Camellia sinensis</i>) by Subcritical Water Extraction (SWE) Combined with Pulsed Electric Field (PEF) or Intense Pulsed Light (IPL) Pretreatment |
| title_sort | improving the extraction of catechins of green tea i camellia sinensis i by subcritical water extraction swe combined with pulsed electric field pef or intense pulsed light ipl pretreatment |
| topic | subcritical water extraction pulsed electric field intense pulsed light green tea tea catechins |
| url | https://www.mdpi.com/2304-8158/10/12/3092 |
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