Modern Extraction Techniques: Food and Agricultural Samples by Charlotta Turner

By Charlotta Turner

Over the past ten years, a number of new extraction innovations were constructed which are swifter, extra computerized and use much less natural solvents in comparison to classical solvent extraction thoughts. additionally, there's a transparent pattern going in the direction of using (and examine on) environmentally sustainable equipment, that is encouraging for the long run. Supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) are of the main priceless ideas for extraction of non-polar and medium polar solutes from strong and semi-solid samples. those strategies in most cases use pressurized carbon dioxide or sizzling beverages similar to water as extraction solvents, respectively. For aqueous samples, stir-bar sorptive extraction (SBSE) has lately been built. those are a number of the innovations that may be defined within the proposed symposium sequence booklet. spotlight will be at the extraction of assorted compounds from meals and agricultural samples in both an analytical or a process-scale point-of-view. a number of of the e-book chapters will examine different innovations, and describe their benefits and drawbacks. functions mentioned during this ebook contain SFE of biopolymers from distillers dried grains, SFE of lipids from oilseeds, PLE of practical components from crops and herbs, tandem SFE/PLE of acrylamide from potato chips, SFE and PLE of ldl cholesterol and fats from hamster liver, and steam distillation-extraction (SDE) and SBSE of flavors from shitake mushrooms.

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Le Maguer, M. in Proc. Institute of Food Technologists Annual Meeting (IFT2001), New Orleans, USA. June 23-27, 2001. , Calimli, A. J. Supercrit. Fluids, 2004, 28, 11-19. , Fantozzi, P. in Proc. 6th International Symposium on Supercritical FlUids, Versailles (F) 29-30 April, 2003, 2934. 36 Seong-Sil-Kang, Byung-Jun-Kim, Byung-Soo-Chun Journal of the Korean Fisheries Society, 1999, 32,217-222. C. J. Supercrit. Fluids, 2002, 23, 257-265. H. J. Am. Oil Chem. , 1991, 68, 571-573. , Saito, S. J. Jpn.

A maximum of 54% of Iycopene was extracted by SC-C02 in 2 h (C02 flow rate:::: 4 kg/h) at 55°C and 300 bar, with the addition of 5% ethanol as a cosolvent. Half of the initially present p-carotene was extracted in 2 h (flow rate = 4 kg/h), at 65° C and 300 bar, also with the addition of 5% ethanol. Favati et aI. (28) extracted Iycopene and p-carotene with neat SC-C02 from products of the tomato industry (skins and seeds). The extractions were conducted at 200 to 700 bar and 40 to 80°CI At 700 bar and 80°C more than 80% of the Iycopene and 70% of the p-carotene could be removed from byproducts in only 11 minutes.

Supercritical CO2 extraction of alkylresorcinols from rye bran is discussed for the first time. As compared to the classical extraction methods, supercritical CO 2 gives higher yields and it allows the separation of the crude extrac into long- and short-chain alkylresorcinol homologues. © 2006 American Chemical Society 51 52 Introduction The extraction of active compounds from plant materials has attracted the attention of much research. Phenolic lipids in particular have earned special interest due to their wide range of biological activities.

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