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  • 1980-1984  (2)
  • 1
    Electronic Resource
    Electronic Resource
    The analysis of trimethylamine in body fluids by a direct medium resolution mass spectrometric method (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 1-3 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple, high throughput method of analysis of trimethylamine in body fluids has been developed to assist with the management of patients with the inherited metabolic disorder, trimethylaminuria. The headspace in sealed vials was analysed using perdeuterated (2H10)trimethylamine hydrochloride as an internal standard. The gas chromatograph inlet system of the mass spectrometer was adapted to suit this method of analysis. Medium resolving power was used to measure the ion ratio of the [M-H]+ ion of trimethylamine and the [M-2H]+ ion of the internal standard. The method is faster and more accurate than gas chromatographic methods. The concentrations of trimethylamine found in normal urine are similar to those reported previously.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200110102
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The analysis of hexitols in biological fluid by selected ion monitoringAbbreviation: Gal-1-PUT= galactose-1-phosphate uridyl transferase. (1980)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 7 (1980), S. 309-313 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The development of a selected ion monitoring assay is described for the analysis of polyos as their per-acetyl derivatives, using L-iditol as an internal standard. Concentrations of mannitol, galatitol, sorbitol and inositol have been determined in the serum, urine and amniotic fluid from women during the second trimester of uncomplicated pregnancies. Two samples of amniotic fluid from galactosaemic pregnancies showed elevated levels of galactitol, 8.1 and 7.7 μ mol I-1 compared with normal concentrations of 0.46 ± 0.26 μ mol I-1, whereas a normal homozygous pregnancy of heterozygous parents showed normal levels.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200070708
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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