Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 99 (1988), S. 253-261 
    ISSN: 1437-1596
    Keywords: Antiepileptics, mass spectrometry ; Mass spectrometry, negative ion chemical ionization ; Hydantoins, mass spectrometry ; Antiepileptika, Massenspektrometrie ; Massenspektrometrie, Negativspektren ; Hydantoine, Massenspektrometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es werden Positiv-Ionen-EI-(PIEI)-, Positiv-Ionen-CI-(PICI)-und Negativ-Ionen-CI-(NICI)-Massenspektren von sieben Hydantoinderivaten und Analogen vorgestellt, daneben die wahrscheinlichen Fragmentierungsmuster. Beim PIEI-Modus unterschieden sich die Molekularionen im Hinblick auf die verschiedenen Verbindungen. Eine Spaltung an der Außenregion der beiden Carbonylgruppen war allen Verbindungen gemeinsam. Beim PICI-Modus zeigten alle Verbindungen quasi-molekulare [M+1]+-Ionen. Beim NICI-Modus waren quasi-molekulare [M−1]−-Anionen Basispeaks mit Ausnahme von Trimethadion und Paramethadion. Alle Negativ-Spektren zeigten Anionen bei m/z 42, verursacht durch [NCO]−; diese Peaks erscheinen nützlich zum Screening von Antiepileptika. Weiterhin werden ein Extraktionsverfahren für Antiepileptika aus Humanurin oder -plasma sowie die gaschromatographische Trennung (GC) beschrieben. Diese Verfahren gestatten die Identifizierung mittels GC/MS.
    Notes: Summary Positive ion electron impact (PIEI), positive ion chemical ionization (PICI), and negative ion chemical ionization (NICI) mass spectra of seven compounds of hydantoins and their analogs are presented; their probable fragmentation modes are also presented. In the PIEI mode, intensities of molecular ions differed according to different compounds. Cleavage at outsides of both carbonyl groups was commonly observed for all compounds. In the PICI mode, all compounds showed [M+1]+ quasi-molecular ions constituting the base peaks. In the NICI mode, [M−1]− quasi-molecular anions were the base peaks except for trimethadione and paramethadione. All negative spectra showed anions at m/z 42 due to [NCO]−; these peaks seem useful for screening of antiepileptics. An extraction procedure for the antiepileptics from human urine or plasma, and their separation by gas chromatography (GC), are also presented to serve for their actual identification by GC/mass spectrometry.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...