Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
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Volume 40, Issue 4
Displaying 1-3 of 3 articles from this issue
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REGULAR PAPERS
  • Stability of Relative Sensitivity Factors in Secondary Ion Mass Spectrometry
    Yoshikazu HOMMA, Masataka YAMAWAKI, Azusa IGO, Shota OCHIAI
    1992 Volume 40 Issue 4 Pages 217-223
    Published: 1992
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.40.217
    JOURNAL FREE ACCESS
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    Relative sensitivity factors (RSFs) in secondary ion mass spectrometry are evaluated from the viewpoint of long term stability using RSFs in semiconductor materials obtained through routine analysis over five years. The variation of RSFs is within ±50% for many kinds of ions in GaAs, InP, and Si. The difference in the RSFs measured by two magnetic sector type instruments with identical mass spectrometers is within the RSF variation for each instrument. These results support the idea that the RSF is transferrable between SIMS instruments of the same type, and quantitative analysis with a deviation of ±50% can be performed using a database of instrument-dependent RSFs.
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  • Thermodynamic Study in the RbBO2–CsBO2 System by Mass-Spectrometric Knudsen Effusion Method
    Yoshinari KATO, Mitsuru ASANO, Toshio HARADA, Yasuo MIZUTANI
    1992 Volume 40 Issue 4 Pages 225-230
    Published: 1992
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.40.225
    JOURNAL FREE ACCESS
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    In the whole composition range of the solid solution in the RbBO2–CsBO2 system, activities and molar Gibbs energies, enthalpies, and entropies of mixing are determined from the ion-intensity ratios measured mass-spectrometrically in the temperature range below solidus line from 764 to 978 K. The activities of RbBO2 and CsBO2 show positive deviation from Raoult's law and decrease with increasing the temperature. The molar enthalpies of mixing are positive. From the small excess molar entropies of mixing, this solid solution is concluded to be almost regular. These results are compared with those for the mixed solutions of alkali halides.
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NOTE
  • Application of Capillary GC/MS for Identification of Drugs on Forensic Chemistry I: Direct Detection of 6-Acetylmorphine in Urine Samples of Heroin Abusers
    Toshitaka Ohshita, Yoshihiko Miyata, Hiroaki Ando
    1992 Volume 40 Issue 4 Pages 231-234
    Published: 1992
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.40.231
    JOURNAL FREE ACCESS
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    It has been considered that heroin and its metabolites in human urine play a main evidence in most cases of heroin use. However heroin is quickly metabolized and run out from a body. There are a few reports and data on their detective research from human urine samples, but very few about underivatized methods. This study was aimed at examining whether heroin metabolites like as 6-acetylmorphine and morphine could be detected from urine samples by GC/MS without derivatization. Heroin and its metabolites in the human urine sample was directly extracted with chloroform-isopropanol (3:1, pH↔9.5, 20°C) and the extracts were analyzed by GC/MS. In the results, we found some heroin metabolites like 6-acetylmorphine and morphine in the urine sample of a drug addict.
    The above data suggest that our direct method is useful for evaluating whether a person use heroin or not. It may also be possible to detect metabolites of heroin from urine samples of heroin abusers, if urine samples were quickly taken from the bodys (at least 4 or 5 hours after use of heroin).
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