Sökning: "accelerated solvent extraction"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden accelerated solvent extraction.

  1. 1. Accelerated Solvent Extraction : Sample Preparation Using High Diffusion Liquids

    Detta är en avhandling från Uppsala universitet

    Författare :Monica Waldebäck; Uppsala universitet.; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Sammanfattning : .... LÄS MER

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

    Detta är en avhandling från Cecilia Sparr Eskilsson, Analytical Chemistry, Lund University

    Författare :Cecilia Sparr Eskilsson; Lunds universitet.; Lund University.; [2003]
    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 : Popular Abstract in Swedish För att kunna mäta ett ämnes halt i ett prov behövs en analysmetod. Det första steget i en analysmetod innefattar provupparbetning. Med det menas att ämnet man vill mäta halten av avskiljs (extraheras) från provet med någon sorts extraktionsteknik. LÄS MER

  3. 3. 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

    Detta är en avhandling från Department of Analytical Chemistry, Lund University

    Författare :Erland Björklund; Lunds universitet.; Lund University.; [1998]
    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

  4. 4. Analysis of PAHs and their transformations products in contaminated soil and remedial processes

    Detta är en avhandling från Umeå : Kemi

    Författare :Staffan Lundstedt; Umeå universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; polycyclic aromatic hydrocarbons; PAHs; degredation; transformation; formation; accumulation; oxidation products; metabolites; oxogenated polycyclic aromatic hydrocarbons; oxy-PAHs; soil; gasworks; remediation; bioremediation; bioslurry; wood-rotting fungi; Fenton´s reagent; avaliability; bioavaliability; chemical analysis; extraction; pressurized liquid extraction; PLE; accelerated solvent extraction; ASE; Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Soil that is heavily contaminated with polycyclic aromatic hydrocarbons (PAHs) is often found at the sites of former gasworks and wood-impregnation plants. Since PAHs are toxic these sites represent a hazard to human health and the environment, and therefore they need to be treated, preferably by a method that destroys the contaminants, and thus eliminates the problem permanently. LÄS MER

  5. 5. Methods for Determination of Benzo(a)pyrene and High Molecular Weight (>300 Da) Polycyclic Aromatic Hydrocarbons in Particulate Matter from Ambient Air and Vehicle Exhausts

    Detta är en avhandling från Stockholm : Department of Analytical Chemistry, Stockholm

    Författare :Christoffer Bergvall; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PAH; dibenzopyrene; benzo a pyrene; standard reference material; air particulate matter; diesel particulate matter; toxic equivalence factor; ultrasonic assisted extraction; accelerated solvent extraction; automation; online coupling; GC MC; LC GC MS; NATURAL SCIENCES Chemistry Analytical chemistry; NATURVETENSKAP Kemi Analytisk kemi; analytisk kemi; Analytical Chemistry;

    Sammanfattning : Air pollution with particulate matter (PM) raises considerable concern because of its adverse effects on human health. For this reason, and because the mechanisms of PM toxicity are not fully known, there is an urgent need to determine the chemical constituents of atmospheric PM, especially PM emanating from traffic - a major source of urban PM. LÄS MER