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KMID : 0380620090410060615
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Korean Journal of Food Science and Technology
2009 Volume.41 No. 6 p.615 ~ p.621
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Supercritical Fluid Extraction of Volatile Components from Strawberry
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Lee Hae-Chang
Choi Hee-Don
Kim Yoon-Sook
Park Yong-Kon
Shin Dong-Bin
Seo Hye-Young
Ji Joong-Ryong
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Abstract
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In order to optimize the supercritical fluid extraction (SFE) conditions of volatile components from the strawberry, we conducted an evaluation of the sample preparation and SFE operating conditions. The analysis of the volatile components extracted by a variety of sample preparation protocols led to the identification of 30, 26, 30, and 34 volatile components in fresh, freeze-dried, 30% celite and 70% celite treatments, respectively. The 70% celite treatment was the most effective in extracting the volatile components from strawberry via SFE. Analysis of the volatile components extracted by a variety of SFE operating conditions yielded identifications of 34, 35, 34, and 35 volatile components at 3,000 psi (40, 50oC) and 6,000 psi (40, 50oC), respectively. The extraction yield of alcohols and acids, and the total volatile component contents, were highest under conditions of 3,000 psi and 55oC. Volatile components from the strawberry were extracted via SFE, simultaneous steam distillation and extraction (SDE), and solvent extraction (SE). The analysis of the volatile components extracted via different extraction methods resulted in the identification of 56, 34, and 32 volatile components in the SDE, SFE, and SE extracts, respectively. The total volatile component contents identified in the SDE, SFE, and SE extracts were 20.268±1.144, 21.627±1.215 and 2.476±0.177 mg/kg, respectively. The SFE extract evidenced higher contents of sweet flavors such as 2-methylbutanoic acid, 2-methylpropanoic acid, and hexanoic acid than the SDE and SE extracts. SFE proved to be the most appropriate method for the extraction of fresh volatile components from the strawberry.
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KEYWORD
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supercritical fluid extraction, strawberry, volatile components, simultaneous steam distillation and extraction, solvent extraction
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