Selective caffeine removal from green tea using supercritical carbon dioxide extraction
被引:109
作者:
Kim, Wan-Joo
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
Hanyang Univ, Div Chem & Bioengn, Seoul 133791, South KoreaKorea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
Kim, Wan-Joo
[1
,2
]
Kim, Jae-Duck
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South KoreaKorea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
Kim, Jae-Duck
[1
]
Kim, Jaehoon
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South KoreaKorea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
Kim, Jaehoon
[1
]
论文数: 引用数:
h-index:
机构:
Oh, Seong-Geun
[2
]
Lee, Youn-Woo
论文数: 0引用数: 0
h-index: 0
机构:
Seoul Natl Univ, Div Chem & Biol Engn, Seoul 151744, South KoreaKorea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
Lee, Youn-Woo
[3
]
机构:
[1] Korea Inst Sci & Technol, Energy & Environm Res Div, Seoul 136791, South Korea
[2] Hanyang Univ, Div Chem & Bioengn, Seoul 133791, South Korea
[3] Seoul Natl Univ, Div Chem & Biol Engn, Seoul 151744, South Korea
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. (C) 2008 Elsevier Ltd. All rights reserved.
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India
Gupta, S
Saha, B
论文数: 0引用数: 0
h-index: 0
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India
Saha, B
Giri, AK
论文数: 0引用数: 0
h-index: 0
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India
Gupta, S
Saha, B
论文数: 0引用数: 0
h-index: 0
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India
Saha, B
Giri, AK
论文数: 0引用数: 0
h-index: 0
机构:
Indian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, IndiaIndian Inst Chem Biol, Div Human Genet & Genom, Kolkata 700032, W Bengal, India