Search for dissertations about: "Analytical model"

Showing result 16 - 20 of 1069 swedish dissertations containing the words Analytical model.

  2. 16. A multivariate approach to the analysis of phytoplankton pigments

    Author : Ludvig Moberg; Olav Kvalheim; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Växtplankton; Analytical Chemistry; analytisk kemi;

    Abstract : Photosynthetic pigments are routinely determined in investigations of marine and freshwater environments, chlorophyll is used as an estimator of phytoplankton biomass. Photosynthetic pigments are also widely used to characterise phytoplankton taxonomic composition. READ MORE

  4. 17. On-line Sample Pretreatment Based on Membrane Enrichment, Mainly Using Supported Liquid Membranes, for Chromatographic Analysis

    Author : Yin Shen; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biological Sample; Environmental Sample; Capillary Gas Chromatography; Ion Chromatography; Automation; Sample Pretreatment; Enrichment; Membrane; Extraction; Analytical chemistry; Analytisk kemi;

    Abstract : The main objective of this work was to construct practical analytical systems for the analysis of environmental and biological samples, using membrane-based techniques for sample pretreatment and chromatography for final analysis. Two types of membrane processes have been applied, with emphasis on automation. READ MORE

  5. 18. Investigations of the retention mechanisms in hydrophilic interaction chromatography

    Author : Ngoc Phuoc Dinh; Knut Irgum; Andrew J. Alpert; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; HILIC; hydrophilic interaction chromatography; adsorption isotherm; water enriched layer; multivariate data analysis; retention mechanism; separation; analytisk kemi; Analytical Chemistry;

    Abstract : Hydrophilic interaction chromatography is well known as a powerful technique separation of polar and ionizable compound nowadays. However the retention mechanism of the technique is still under debate. Understanding retention mechanism would facilitate the method development using the technique and its future improvement. READ MORE

  6. 19. Instrumental and methodological developments for isotope dilution analysis of gaseous mercury species

    Author : Tom Larsson; Erik Björn; Holger Hintelmann; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mercury; gas; species; speciation analysis; isotope dilution analysis; permeation tubes; Analytical chemistry; Analytisk kemi;

    Abstract : This thesis deals with instrumental and methodological developments for speciation analysis of gaseous mercury (Hg(g)), based on isotope dilution analysis (IDA). The studied species include Hg0, (CH3)2Hg, CH3HgX and HgX2 (where X symbolises a negatively charged counter ion in the form of a halide or hydroxyl ion). READ MORE

  7. 20. Improved techniques for CE and MALDI-MS including microfluidic hyphenations foranalysis of biomolecules

    Author : Johan Jacksén; Åsa Emmer; Tomas Bergman; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Capillary electrophoresis; Hydrophobic peptides proteins; Matrix-Assisted Laser Desorption Ionization Mass Spectrometry; Prestructured target; Off-line interface; Silicon micro canal; Matrix; Peptide-fluorescein isothiocyanate adducts; Bovine serum albumin; DHAP; Hyphenations; Hydrophobicity; Single wood fiber analysis; Pre-concentration; Concentration platform; Analytical chemistry; Analytisk kemi;

    Abstract : In this thesis, improved techniques for biomolecule analysis using capillary electrophoresis (CE) and matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS) and hyphenations between those have been presented.A pre-concentration method which is possible to apply in both techniques, has also been investigated. READ MORE