乱用薬物を中心とした科学捜査へのシンクロトロン放射光の応用

概要

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Synchrotron radiation was applied to analyze various forensic samples, mainly drugs of abuse. In the first study, an impurity profiling analysis of heroin and 3,4-methylenedioxymethamphetamine (MDMA) samples was presented by using total reflection X-ray fluorescence spectroscopy (TXRF) in our laboratory. After recognizing the utility of this technique, synchrotron radiation total reflection X-ray fluorescence spectroscopy was applied to analyze various trace elements in small amounts of drugs of abuse. By using the synchrotron radiation experimental system, pg amounts of each trace element in 10 μg of various drugs could be easily detected, which was not the case for a standard TXRF experimental system, or for other elemental analysis techniques. In the second study, high energy X-ray fluorescence spectroscopy was applied to analyze various heavy elements in small amounts of drugs of abuse. In the third study, a new imaging of forensic samples was performed by phase-contrast X-ray imaging method using synchrotron radiation. In the forth study, elemental mappings using an X-ray microbeam derived from synchrotron radiation were applied to analyze a meteorite. As a result, those techniques were shown to be very useful discrimination methods applicable to forensic samples, mainly drugs of abuse. The utilization of synchrotron radiation will open new application fields for forensic science.
2003-11-05