Sökning: "packed column"

Visar resultat 1 - 5 av 25 avhandlingar innehållade orden packed column.

  1. 1. Packed Column Supercritical Fluid Chromatography : Applications in Environmental Chemistry

    Författare :Nicole Riddell; Bert van Bavel; Robert McCrindle; Ingrid Ericson Jogsten; Jake Ryan; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supercritical Fluid Chromatography; Mass Spectrometry; Ionization; POPs; APPI; APCI; chiral; achiral; packed column;

    Sammanfattning : Although gas and liquid chromatography have emerged as dominant separation techniques in environmental analytical chemistry, these methods do not allow for the concurrent analysis of chemically diverse groups of persistent organic pollutants (POPs). There are also a small number of compounds which are not easily amenable to either of these traditional separation techniques. LÄS MER

  3. 2. Modelling of packed bed distillation column

    Författare :Anders Karlström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; experimental validation; quality control; distributed parameter; Hankel norm; modelling; Distillation; model reduction; heat transfer; inferential measurements; least squares; momentum;

    Sammanfattning : .... LÄS MER

  4. 3. Fluid dynamics and mass transfer in bubble columns with and without packing

    Författare :Peter Therning; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; packed bubble column; fluid dynamics; bubble column; laser doppler anemometry LDA ; mass transfer; hydrodynamics; multiphase reactor; dispersion;

    Sammanfattning : Bubble columns are used in the chemical industry to perform gas liquid reactions, like oxidation, hydrogenation and fermentation. The objective of the present thesis was mainly to study the fluid dynamics of semi batch packed bubble columns at both atmospheric and pressurized conditions. LÄS MER

  5. 4. Chiral packed capillary chromatography using an in-column immobilized selector : With special emphasis on vancomycin

    Författare :Lars A. Svensson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Farmaceutisk kemi; Pharmaceutical chemistry; Farmaceutisk kemi; analytisk farmaceutisk kemi; Analytical Pharmaceutical Chemistry;

    Sammanfattning : Packed fused silica capillary columns have been used for enantioseparation of drugs and related compounds. The technique to prepare the chiral stationary phase (CSP) involved a reductive amination of aldehyde functionalized silica with a chiral selector. The immobilization was performed in the packed column, thereby minimizing the use of selector. LÄS MER

  7. 5. Towards more selective sorbents for extraction of drugs and biomarkers from biological fluids using molecularly imprinted polymers

    Författare :Mohammad Mahdi Moein; Mohamed Abdel-Rehim; Milton L. Lee; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecularly imprinted polymer; sol-gel; solid phase extraction; microextraction by packed sorbent; monolithic column; Analytical Chemistry; analytisk kemi;

    Sammanfattning : Sample preparation has a critical role as a first step in analytical processes, especially in bioanalysis and environmental analysis. A good sample preparation technique should be robust and stable, regardless of the sample matrix. LÄS MER