Showing papers by "Kenji Hara published in 1996"
TL;DR: In this article, a new approach to investigate the circumstances relating to carbon monoxide intoxication by analysing volatile hydrocarbons in the blood of cadavers is reported, which can be characterized into four categories depending on the compounds detected.
Abstract: A new approach to investigate the circumstances relating to carbon monoxide intoxication by analysing volatile hydrocarbons in the blood of cadavers is reported. Headspace gas chromatography/mass spectrometry was used to demonstrate the hydrocarbons. The results can be characterized into four categories depending on the compounds detected. In construction fire cases where no accelerants were found at the scene benzene, toluene and styrene were detected in the blood. In cases where gasoline was found in the fire debris surrounding the victim, high levels of benzene, toluene, ethylbenzene, xylene isomers,n-hexane andn-heptane were detected in the blood. In cases where kerosene was found in the fire debris around the victim, benzene, toluene, ethylbenzene, xylene isomers, C9-aromatics(n-propylbenzene, trimethylbenzene isomers),n-octane,n-nonane andn-decane were detected in the blood. In cases where the victim was found inside a gasoline-fuelled automobile filled with exhaust gas, benzene, toluene, ethylbenzene, xylene isomers, C9-aromatics were found, but no aliphatic hydrocarbons such as components of petroleum. The analyses of the combustion gases of inflammable materials, exhaust gas, gasoline vapours and kerosene vapours were also performed to evaluate the results of the blood analyses. Consequently, some compounds are proposed as indicators to discriminate between inhaled gases i.e. styrene in common combustion gas,n-hexane andn-heptane as well as benzene, toluene and C9-aromatics in gasoline cases,n-nonane andn-octane as well as benzene, toluene and C9-aromatics in kerosene cases, and benzene, toluene, C9-aromatics but no aliphatic hydrocarbons in exhaust gas cases.
20 citations
TL;DR: In this paper, an improved method for selected ion monitoring analysis of oxidation hair dyes in human hair is described, where the diamines (p-phenylenediamine [PPDA], toluene-2,5-diamine (T-2-5-DA]) were directly extractd with diethyl ether from the degraded hair solution.
Abstract: An improved method for selected ion monitoring analysis of oxidation hair dyes in human hair is described. Ten centimeter of hair specimen, stained with oxidation hair dye which was left for three months, was dissolved in 0.3 ml of 3N-NaOH solution containing 50 mg of sodium hydrosulfite. Then, the diamines (p-phenylenediamine [PPDA], toluene-2,5-diamine [T-2,5-DA]) were directly extractd with diethyl ether from the degraded hair solution. Aminophenols (o-aminophenol [OAP], m-aminophenol [MAP], p-aminophenol [PAP]) were extracted with diethyl ether from the aqueous layer neutralized with 3N-acetic acid. Both extracts were devivatized with pentaflourobenzaldehyde and analyzed by GC/MS. Though PPDA, T-2,5-DA, OAP, MAP and PAP were not separated by previously repoted method, these five main components of oxidation hair dyes were separated from each other and identified. By this method, MAP could be clearly separated from PAP.