Selective caffeine removal from green tea using supercritical carbon dioxide extraction
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Wan-Joo | - |
dc.contributor.author | Kim, Jae-Duck | - |
dc.contributor.author | Kim, Jaehoon | - |
dc.contributor.author | Oh, Seong-Geun | - |
dc.contributor.author | Lee, Youn-Woo | - |
dc.date.accessioned | 2022-12-21T00:13:24Z | - |
dc.date.available | 2022-12-21T00:13:24Z | - |
dc.date.created | 2022-08-26 | - |
dc.date.issued | 2008-12 | - |
dc.identifier.issn | 0260-8774 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177616 | - |
dc.description.abstract | Caffeine and EGCG (epigallocatechin gallate) were extracted from green tea using supercritical carbon dioxide (SCCO2) with water as a cosolvent. Experimental conditions were carefully chosen to selectively extract a large amount of caffeine from the green tea while to remain a large amount of EGCG in the green tea. Various experimental conditions were explored including temperatures ranging 40-80 degrees C, pressure ranging 200-400 bar, and water contents ranging 4-7 wt%. At 40 degrees C, 400 bar and the water content of 7 wt%, the caffeine extraction yield was 54% while the EGCG extraction yield was 21%, resulting in caffeine/EGCG extraction selectivity of 2.57. The larger caffeine extraction yield agreed well with estimation of solubility parameter differences between SCCO2/water and caffeine/EGCG. The extraction results using SCCO2/water were compared with conventional liquid solvent extraction using water or ethanol. The selectivity of caffeine/EGCG extraction with water was 0.88 and the selectivity of caffeine/EGCG extraction was 0.24 with ethanol. Thus SCCO2 extraction with water as a cosolvent is suitable for the selective extraction of caffeine from the green tea. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.title | Selective caffeine removal from green tea using supercritical carbon dioxide extraction | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Oh, Seong-Geun | - |
dc.identifier.doi | 10.1016/j.jfoodeng.2008.05.018 | - |
dc.identifier.scopusid | 2-s2.0-46049091527 | - |
dc.identifier.wosid | 000257967000008 | - |
dc.identifier.bibliographicCitation | JOURNAL OF FOOD ENGINEERING, v.89, no.3, pp.303 - 309 | - |
dc.relation.isPartOf | JOURNAL OF FOOD ENGINEERING | - |
dc.citation.title | JOURNAL OF FOOD ENGINEERING | - |
dc.citation.volume | 89 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 303 | - |
dc.citation.endPage | 309 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Food Science & Technology | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.relation.journalWebOfScienceCategory | Food Science & Technology | - |
dc.subject.keywordPlus | FLUID EXTRACTION | - |
dc.subject.keywordPlus | RETROGRADE CONDENSATION | - |
dc.subject.keywordPlus | CAMELLIA-SINENSIS | - |
dc.subject.keywordPlus | CATECHINS | - |
dc.subject.keywordPlus | POLYPHENOLS | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | CONSUMPTION | - |
dc.subject.keywordPlus | SOLUBILITY | - |
dc.subject.keywordAuthor | caffeine | - |
dc.subject.keywordAuthor | EGCG (epigallocatechin gallate) | - |
dc.subject.keywordAuthor | green tea | - |
dc.subject.keywordAuthor | solubility parameter | - |
dc.subject.keywordAuthor | supercritical carbon dioxide | - |
dc.subject.keywordAuthor | extraction | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0260877408002197?via%3Dihub | - |
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