著者

鈴木 信明 奥山 修司 岩井 悠樹 佐藤 元泰

出版者

日本法科学技術学会

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

pp.823, (Released:2022-02-18)

参考文献数

14

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Crimes using sleeping pills with malice are occuring continuously. Although it is essential to identify the brand name of sleeping pills in criminal investigations, the recent diffusion of generic drugs has led to a problem that the brand name of the sleeping pills used by suspects cannot be narrowed down from the identification of the active ingredients only. To solve this problem, we have tried to develop a method for identifying the manufacturer of a sleeping pill by analyzing the pharmaceutical additives in left-over beverages. Etizolam tablets 0.5 mg which are manufactured by 16 pharmaceutical companies were selected as the objects of study. The powdered Etizolam tablets were mixed into water and beverages and then discriminated whether the pharmaceutical additives are contained or not with six analytical methods, including Pyrolysis-gas chromatography-mass spectrometry. As a result, it became possible to identify almost all of the pharmaceutical companies via a combination of contained pharmaceutical additives. This analysis method to identify the pharmaceutical companies by analyzing the pharmaceutical additives is the first attempt in our extension research. We think that this method can be applied to many other medicines, and expect that this method can contribute much to identifying or narrowing down suspects.

著者

肥田 宗政 佐藤 弘康 奥山 修司

出版者

日本法科学技術学会

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.17, no.2, pp.83-89, 2012

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&nbsp;&nbsp;The scanned digital image was converted to three histograms of 256-bit depth for each color (red, green, blue) based on RGB color model, using image-processing software. Summation of three histograms at every depth was calculated. An inherent spectrum for each tape was featured. Thirty-one similar colored adhesive cloth tapes from 10 different manufacturers were examined. Cluster analysis was performed using 310 spectra obtained from 31 samples. Cluster analysis indicated that 31 samples were divided into 5 groups. Multiple correlation coefficient (R) was used to discriminate the adhesive cloth tapes. R was examined whether it would be possible to be considered a criterion of judgment of the difference discernment between samples to be shown as a numerical value. As a result, in order to judge it as the same adhesive cloth tape, it became clear that R was 0.994 or more.<br>