Sökning: "Supercritical fluid extraction"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden Supercritical fluid extraction.

  1. 1. Recent Extraction Techniques with Emphasis on Supercritical Fluid Extraction and Microwave-assisted Extraction

    Författare :Cecilia Sparr Eskilsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytisk kemi; Analytical chemistry; Pressurized hot water extraction; Pressurized liquid extraction; Microwave-assisted extraction; Recent extraction techniques; Supercritical fluid extraction;

    Sammanfattning : Today’s requirements of fast, reliable and selective analytical methods with minimal usage of organic solvents have accelerated the development of new, automated extraction techniques. In this thesis recent extraction techniques with emphasis on supercritical fluid extraction (SFE) and microwave-assisted extraction (MAE) were investigated. LÄS MER

  3. 2. Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling

    Författare :Victor Abrahamsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supercritical fluid extraction; supercritical fluid chromatography; linseed; microalgae; extraction kinetics; inverse modeling; curve resolution;

    Sammanfattning : Supercritical fluid extraction is an extraction technique suitable for lipophilic compounds from solid samples. Most commonly supercritical carbon dioxide is the main component in the extraction phase, rendering the technique relatively environmentally benign. LÄS MER

  4. 3. Analytical Supercritical Fluid Extraction of Lipid Containing Samples

    Författare :Mattias Järemo; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SFC; extraction cell; liquid samples; fat retainers; lipids; SFE; carbon dioxide; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Traditionally, sample work-up has been associated with different kinds of liquid extraction techniques involving a large consumption of hazardous solvents. There are today regulations that aims at replacement of dangerous chemicals which has created a need for new extraction techniques. LÄS MER

  5. 4. Determination of Persistent Organic Pollutants in Solid Environmental Samples Using Accelerated Solvent Extraction and Supercritical Fluid Extraction. Exhaustive extraction and sorption/desorption studies of PCBs

    Författare :Erland Björklund; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sorption; Sediment; PCBs; Polychlorinated Biphenyls; POP; Persistent Organic Pollutants; SFE; Supercritical Fluid Extraction; Accelerated Solvent Extraction; ASE; Desorption; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Human activity is constantly causing environmental problems due to production and release of numerous chemicals. A group of compounds of special concern is persistent organic pollutants (POP). These toxic, lipophilic chemicals have a high chemical and biological stability, and tend to accumulate in the lipid phase of living organisms. LÄS MER

  7. 5. Supercritical fluid extraction of bioactive compounds from berry seeds

    Författare :Graziele Gustinelli Carvalho; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tocopherols; Carotenoids; Fatty acids; Anti-oxidative activity; Berry seed oils; Microscopy.; Tocotrienols; Supercritical CO2 extraction;

    Sammanfattning : Industrial processing of berries into food and beverages generates seeds as a by-product. Most of these seeds are treated as waste even though they contain valuable biological compounds. An approach to adding value to the process is to extract these compounds from the seeds. LÄS MER