科学捜査に果たす質量分析の役割

概要

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Quantitative analysis of components in a sample can be performed by the different calculation method of regression analysis (DCR) without a calibration curve or separation of the components. In addition, the mixing ratio of different components in an unknown sample is determined from a multiple regression equation obtained using the measured values of two or more known samples and the unknown sample. In the present study, the mixing ratio of air and organic solvent vapors in an unknown sample was determined from the mass fragment values of several known samples and air measured with a gas chromatograph-mass spectrometer by DCR. Using this method, the mixing ratio of an unknown sample was determined without interference from other substances that might be present in the sample. Furthermore, the existence of a small unrecognized component in an unknown sample was deduced based on the difference between the measured and calculated values.
2008-06-01