[Adequate assessment of linear function of calibration according to GOST R ISO 11095-2007 for ethanol mass concentration measurement]. / Otsenka adekvatnosti lineinoi funktsii kalibrovki po GOST R ISO 11095-2007 dlya izmereniya massovoi kontsentratsii etanola.

OBJECTIVE: To assess the adequacy of linear function of calibration according to GOST R ISO 11095-2007 for ethanol mass concentration measurement using internal reference materials (RMs). MATERIAL AND METHODS: An experiment on calibration in accordance with the GOST R ISO 11095-2007 National standard of the RF was carried out using internal RMs, namely aqueous solutions of ethanol at different concentrations. Measurements were performed for two subbands of ethanol concentrations at RMs: 0.15-1.05 and 1.0-7.0 mg/ml - according to the certified methodology. RESULTS: The graphs of the calibration's functions based on experimental data are consistent with the assumption of the calibration function's linearity, as well as the assumption of the standard deviation's constance of residues is equitable for two subbands of RMs. CONCLUSION: Proven linear models in the calibration experiment may be recommended for use in the ethanol mass concentration measurement.

[Forensic and medical significance of the toxic effect of an unidentified substance in the context of chemical trauma]. / Sudebno-meditsinskoe znachenie toksicheskogo deistviia neustanovlennogo veshchestva v strukture khimicheskoi travmy.

A statistical analysis of cases of chemical poisonings over a six-year period in Volgograd was conducted. The features and circumstances of 209 fatal poisonings by an unidentified substance were analyzed and systematized. The number of poisoning deaths rose during this period. It was found that the circumstances of death help in diagnosing the possible characteristics of the poison. Attention is drawn to the problems that arise when conducting a forensic chemical analysis, which may be useful for deciding the specific cause of death in future cases.