• 한국식품과학회지
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• 제28권3호
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• pp.475-481
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• 1996

초임계유체를 이용하여 간단하고, 신속하고, 저렴하게 식품 중의 잔류농약을 추출, 정제하는 방법을 개발하기 위하여 10종의 유기염소계 농약에 대하여 ppm수준의 농도에서 초임계 이산화탄소를 이용하여 추출 온도 및 압력 등 추출조건을 달리하여 추출수율을 측정하였다. 초임계 이산화탄소 추출에 의한 유기염소계 잔류농약 표준용액의 회수율은 103bar에서 추출온도가 증가할수록 증가하였다. 유기염소계 잔류농약 표준용액의 최대 평균 회수율은 $40^{\circ}C/172\;bar.$에서 98.3%였다. 대구, 넙치, 오징어에 첨가한 유기염소계 농약의 평균 첨가회수율은 $40^{\circ}C/172\;bar.$에서 각각 85.6, 74.6, 83.0%였다.

• 한국군사과학기술학회지
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• 제11권5호
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• pp.99-106
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• 2008

Metal ions such as Cu and Cr were extracted from the Cu, Cr and Ag impregnated active carbon by contacting the solid surfaces with supercritical carbon dioxide(Sc-$CO_2$) containing chelating agents. About 10g of the active carbon sample were loaded in a vertical tube extractor contacting with $CO_2$ flowing from the bottom of the tube for 6hrs. The ligands used were acetyl acetone(AA) and Cyanex-302(C-302). Water and methanol were used as entrainers to study the effect of co-solvent to $CO_2$. Experimental results showed that C-302 was more effective than AA in removing Cu with the maximum extraction of 42.0wt%, while 57.6wt% of Cr was extracted with AA from the sample.

• 한국해양바이오학회지
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• 제1권3호
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• pp.206-212
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• 2006

Supercritical carbon dioxide ($SCO_2$) extraction was investigated as a method for protein-sourcing material from squid viscera. To find the optimum conditions, the extraction of squid viscera using $SCO_2$ was performed under the conditions of temperature range from 35 to $45^{\circ}C$ and constant pressure 25 MPa using Hewlett-Packard 7680T. Also from result of SDS-PAGE, the protein denaturation was minimized when using $SCO_2$ extraction. And the major amino acids in the squid viscera were glutamic acid, aspartic acid, lysine, leucine, arginine, alanine, glycine, isoleucine, and valine. The main fatty acids from squid viscera were myristic acid, palmitic acid, stearic acid, heneicosanoic acid, palmitoleic acid, elaidic acid, oleic acid, eicosenoic acid, EPA (eicosapentaenoic acid), and DHA (docosahexaenoic acid).

• KSBB Journal
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• 제20권5호
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• pp.383-386
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• 2005

압착이나 유기용매 추출방식으로 생산된 포도씨유에는 resveratrol이 함유되어있지 않다 초임계 이산화탄소로 추출하는 경우 포도씨에 존재하는 resveratrol의 약 $1.6\%$가 추출 함유됨을 확인하였다. 초임계 추출 효율은 포도씨 건조 정도에 따라서 달라졌는데, 시료에 수분이 전혀 있지 않은 경우는 resvertrol을 추출되지 않았다. 수분함량이 증가할수록 추출 효율이 증가하는데, 수분이 resvertrol을 추출에 중요한 역할을 하였다. 초임계유체 추출 시간에 따른 추출된 포도씨 유의 resvertol 함량은 초반보다 후반으로 갈수록 증가하는 경향을 나타내었다. 초반에 오일 이 많이 추출되고 이후 수분이 빠져나오는 추출성향을 볼 때, resvertrol추출에는 수분이 초임계유체의 성질에 큰 영향을 미쳐 추출 효율을 변화시키는 것으로 생각된다.

• 한국식품영양과학회지
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• 제26권5호
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• pp.860-865
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• 1997

Investigations were performed on the effects of extraction temperature, pressure, time on solubility and selectivity of egg yolk lipid and cholesterol, and color and fatty acid composition of the residue in supercritical carbon dioxide(SC-Co$_2$) extraction. Lipid and cholesterol solubility increased as the increase of Co$_2$ density and was found to strongly depend on the extraction pressure rather than the extraction temperature. The relative concentration of cholesterol in the extract increased with an increase in temperature and decreased with an increase in pressure and extraction time. extraction of dried eg yolk for 3hr at 4$0^{\circ}C$/276 bar removed 46.1% of cholesterol from the residual egg yolk with a yield of 63.2%. SC-Co$_2$ extraction produced a lighter color egg yolk with less redness and yellowness. As the extraction time increased, the resultant residual egg yolk became more saturated with fatty acids. SC-$CO_2$ extraction offers a safe, natural method for removing cholesterol from dried egg yolk.

• KSBB Journal
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• 제26권5호
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• pp.453-458
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• 2011

In this study, two different extraction techniques, organic solvent extraction and supercritical carbon dioxide ($SCCO_2$) extraction, were employed to evaluate the extraction efficiency of oil from Chlorella vulgaris. In the organic solvent extraction, the effects of various organic solvent on the extraction yield were investigated. The $SCCO_2$ extraction was carried out while varying such operating parameters as temperature, pressure, $SCCO_2$ flow rate, and cosolvent. About 4.9 wt% of oil was extracted from ground Chrollera vulgaris for 18 h when dichloromethane/methanol (2：1, v/v) was used as an extraction solvent. The oil yield of the $SCCO_2$ extraction was found to be very low (0.53 wt%) and to increase up to about 0.86 wt% with the addition of cosolvent.

• 한국수산과학회지
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• 제34권3호
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• pp.207-212
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• 2001

초임계 이산화탄소를 이용한 가다랑어 내장으로부터 지방산 추출 및 단백질 농축물의 제조를 위하여 초임계 추출장치의 조건을 압력 1,500-2,000psig, 온도$25^{\circ}C\~40^{\circ}C$으로 하여 추출실험을 하였다. 유속 50mL/min, 압력 1,800psig, 온도 $35^{\circ}C$, 입자크기 0.25mm에서 약 $97\%$ 이상의 지질 추출효율을 보였고, Fig. 5와 6에서 알 수 있듯이 압력 1,800psig, 온도 $35^{\circ}C$, 입자크기 0.25mm의 조건에서 지질을 제거함으로 인하여 약 $50\%$의 단백질이 회수되었고 대부분의 이 취가 제거된 것을 관능적으로 확인할 수 있었다. 이 조건에서 추출된 지질의 주요 지방산으로는 palmitic acid (16: 0), oleic acid(18:1) 등이었고, 주요 유리 아미노산는 taurine 등이었으며, 주요구성 아미노산은 glutamic acid, leucine, lysine 등이었다.

• 한국해양바이오학회지
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• 제2권1호
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• pp.55-59
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• 2007

The oil and concentrated protein powder from squid viscera was extracted and recovered by a semi-batch supercritical carbon dioxide ($SCO_2$) extraction system and the degree of oxidation in the extracted oil was measured in order to compare with extracted oils using organic solvents. The degree of storage in treated squid viscera by $SCO_2$ extraction was measured in order to compare with untreated squid viscera. As results obtained, it was found that the auto-oxidation of the oils using $SCO_2$ extraction occurred very slowly compared to the oils by organic solvent extraction. And the treated squid viscera by $SCO_2$ extraction was reached the point of initial rottenness slowly than untreated squid viscera.

• Bulletin of the Korean Chemical Society
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• 제35권10호
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• pp.3107-3110
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• 2014

• Fisheries and Aquatic Sciences
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• 제15권4호
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• pp.275-281
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• 2012

Yellow croaker Larimichthys polyactis muscle oil was extracted using an environmental friendly solvent, supercritical carbon dioxide (SC-$CO_2$), in a semi-batch flow extraction process. SC-$CO_2$ was applied at temperature $35^{\circ}C$ to $45^{\circ}C$ and $150^{\circ}C$ to $250^{\circ}C$ bar of pressure. The flow rate of $CO_2$ (27.79 g/min) was constant throughout the entire 1.5 h extraction period. The oil extraction yield was influenced by the physical properties of SC-$CO_2$ at different temperatures and pressures. The extracted oil was analyzed by gas chromatography to determine the fatty acid composition. According to our results, the SC-$CO_2$ extracted oil was high in eicosapentaenoic acid and docosahexaenoic acid. In addition, the SC-$CO_2$ extracted oil showed greater stability than n-hexane extracted oil based on the peroxide value and acid value. Thus, the quality of yellow croaker oil obtained by SC-$CO_2$ extraction was slightly higher than that of oil obtained by n-hexane extraction.