[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.

ABSTRACT

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.