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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 94 (1985), S. 137-143 
    ISSN: 1437-1596
    Keywords: Malathion, mass spectrometry ; Organophosphorus pesticide, malathion ; Mass spectrometry, negative ion ; Malathion, Nachweis ; Insektizide, Nachweis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Eine 53 Jahre alte Frau beging Selbstmord durch Einnahme eines Schädlingsbekämpfungsmittels. Blut und Mageninhalt wurden mit Acetonitril und Chloroform extrahiert und mittels Gaschromatographie (GC)-negativer chemischer Ionisierung (CI)-Massenspektrometrie (MS) untersucht. Im negativen Ionenstrom-Diagramm trat ein großer Peak auf, das Massenspektrum zeigte ein m/z 157, was auf die Anwesenheit eines Organophosphat-Insektizids hinweist. Durch Untersuchung des Spektrums im positiven Ionenstrom-Diagramm wurde es als Malathion identifiziert. Im negativen Ionenstrom-Diagramm war der Malathion-Peak ohne Verunreinigungen darstellbar und zeigte nur einen geringfügigen Untergrund. Die Empfindlichkeit bei der Methode der negativen Ionisierung ist ca. 5–10fach höher als bei positiver Ionisierung. Die Ergebnisse zeigen, daß GC in Verbindung mit negativer Ionisierung und MS sowohl zum Screening als auch für den quantitativen Nachweis von Organophosphat-Pesticiden geeignet ist.
    Notes: Summary We experienced an autopsy case in which a 53-year-old woman committed suicide by ingesting allegedly a certain agricultural chemical. The blood and stomach contents, after extraction with acetonitrile and chloroform, were subjected to analysis by gas chromatography (GC)/negative ion chemical ionization (CI) mass spectrometry (MS). By total ion monitoring in the negative CI mode, a large peak appeared. The mass spectrum of the peak showed a strong anion at m/z 157, suggesting the presence of an organophosphorus pesticide. By measuring its spectrum in the positive electron impact (EI) mode, it was identified as malathion. The selected ion monitoring in the negative CI mode showed that the malathion peak was not interfered with by any impurities, and its background was very low. The sensitivity in the negative CI mode was about 5–10 times higher than that in the positive EI mode. Our data show that the GC/negative ion CI MS is useful for both screening and sensitive quantitation of organophosphorus pesticides.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-8580
    Keywords: Energy charge ; Hepatectomy ; Ketone body ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The changes in arterial blood levels of glucose, free fatty acids, ketone bodies, and amino acids were investigated after 70% hepatectomy in rabbits in relation to the changes in adenylate energy charge of the remnant liver and ketone body ratio of arterial blood. Hepatic energy charge decreased to 0.767 ± 0.008 within 24 h (p 〈 0.001), and arterial blood ketone body ratio decreased to 0.415 ± 0.041 within 12 h (p 〈 0.001). Plasma free fatty acid concentrations increased to about twice the original values within 12 h (p 〈 0.01), total amino acid concentrations also doubled within 24 h (p 〈 0.01), and blood glucose levels decreased to below 100 mg/dl at 12 and 24 h (p 〈 0.05). Afterward, at 96 h postoperatively (p.o.), blood ketone body ratio and energy charge levels were restored to near normal levels with the normalization of blood glucose, plasma free fatty acids, and plasma amino acids. These findings suggest that the decreased energy charge of the remnant liver concomitant with a fall in blood ketone body ratio may be the basis of the sequential changes in the blood concentration of fuels after massive hepatectomy.
    Type of Medium: Electronic Resource
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