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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 901-906 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cortisol is thermally unstable. It is easily decomposed by loss of ketence and water. The spectrum of the resulting 11β-hydroxy-Δ4-androsten-3,17-dion can be superimposed upon the spectrum of the undecomposed cortisol, which only can be obtained free of the decomposition product under carefully controlled conditions. The thermal degradation product can be eaisly detected by its molecular peak at mass 302 and a key fragment at mass 163, which are nearly absent in the spectrum of cortisol. Cortisol is therefore an excellent testing material for the quality of inlet systems.
    Notes: Cortisol ist thermisch instabil. Es zersetzt sich leicht unter Verlust von Keten und Wasser, Das Spektrum das entstehenden 11β-Hydroxy-Δ4-androsten-3,17-dions überlagert sich dem Cortisolspektrum, das man frei von Zerstezungsprodukt nur unter sorgfältiger Einhaltung der Aufnahmebedingungen erhält Das thermische Zersetzungsprodukt läßt sich leicht an seinem Molekül-Ion der Masse 302 und einem Schlüsselbruchstück der Masse 163 erkennen, die im Cortisolspektrum nahezu völlig fehlen, so daß Cortisol eine ausgezechnete Testsubstanz zur Qualitätsprüfung vonEinlass-Systemen darstellt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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