Supercritical carbon dioxide extraction of onion oleoresin

✍ Scribed by Sass-Kiss, Agnes; Czukor, Balint; Gao, Yanxiang; Stefanovits, Pal; Boross, Ferenc

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 356 KB
• Volume: 76
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199802)76:2<189::aid-jsfa930>3.0.co;2-e

✦ Synopsis

Supercritical carbon dioxide (SC-extraction on a laboratory-CO 2 ) scale, was applied to produce oleoresin from dried onion (Allium cepa L). The goal of this work was to determine the optimal conditions of extraction for producing oleoresin with the highest yield and the best quality. A polynomial model was developed on the data. The square of correlation coefficient was R2 \ 0É9022 (at P O 0É05). The statistical analysis showed that the extraction pressure, temperature, and time have signiÐcant inÑuence on the yield of the oleoresin. Increasing these parameters resulted in an increase in the yield. Maximum yield was obtained when the extraction pressure and temperature were above 350 bar and 57¡C, respectively. At the lowest pressure (150 bar) applied the highest concentration of sulphur was produced in the oleoresin. The concentration of sulphur increased as a function of temperature when the pressure was maintained at 300 and 400 bar. The composition of volatile compounds of oleoresin di †ered from that of distilled onion oil.

1998 SCI.