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Development of Methods in CE, CE-MS and MS/MS: Applications in Pharmaceutical, Biomedical and Forensic sciences
Uppsala University, Medicinska vetenskapsområdet, Faculty of Pharmacy, Department of Medicinal Chemistry.
2001 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Capillary electrophoresis-mass spectrometry has been used successfully for the analysis of a wide range of analytes such as chiral local anaesthetics, sulphonated reactive dyes and endogenous neurotransmitters and neuropeptides.

The partial filling technique was used in CE-MS for chiral separation of bupivacaine and ropivacaine using the non-volatile selector β-cyclodextrin. By only partially filling the capillary with selector and using capillaries coated with polyacrylamide to suppress the electroosmotic flow, introduction of the selector into the mass spectrometer was avoided. An impurity of 0.25% of the R-enantiomer of ropivacaine in the S-form could be detected.

The partial filling technique was developed further using CE employing two different selectors in separate plugs in the capillary. This enhanced the separation efficiency and offered greater flexibility in controlling the separation.

By using transient-isotachophoresis (tITP)-CE-MS it was possible to concentrate and detect classical neurotransmitters and neuropeptides with masses ranging from 104 Da to 1642 Da. γ -Aminopropyltriethoxysilane coated capillaries were used to minimize adsorption of the peptides onto to capillary surface. Endogenous dopamine, glutamate, γ-aminobutyric acid (GABA), acetylcholine, methionine-enkephalin and substance P 1-7 were detected in the striatum of marmoset monkey.

Sulphonated dyes obtained from single textile fibres were analysed using CE-MS. Capillary electrophoresis was found to be a good way of removing the excess amounts of glucose present in the sample that would otherwise interfere with the electrospray ionisation.

Automatic function switching, originally developed for use together with liquid chromatography, was found to be a great method for acquiring MS/MS data when doing infusion experiments saving both time and sample without decreasing the quality of the MS/MS data. It was also found to be a more time efficient way than using the precursor ion scanning mode on the Q-TOF to obtain precursor ion data.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2001. , p. 39
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Pharmacy, ISSN 0282-7484 ; 257
Keywords [en]
Pharmaceutical chemistry
Keywords [sv]
Farmaceutisk kemi
National Category
Medicinal Chemistry
Research subject
Analytical Pharmaceutical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-1361ISBN: 91-554-5107-1 (print)OAI: oai:DiVA.org:uu-1361DiVA, id: diva2:160861
Public defence
2001-10-12, lecture hall B22, Biomedical Centre, Uppsala, 10:15
Opponent
Available from: 2001-09-19 Created: 2001-09-19 Last updated: 2018-01-13Bibliographically approved

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