[Method of linear calibration function control according to GOST R ISO 11095-2007 for measuring the mass concentration of ethanol].

Objective: Implementation of the control method to validate previously obtained calibration functions according to GOST R ISO 11095-2007 using Reference Materials (RM): standard RMs - aqueous solutions of ethanol, produced and certified by the organization, and internal RMs - aqueous solutions of ethanol in different concentrations, developed by the user for internal use.

Material and methods: We applied the control method in accordance with the National Standard of the Russian Federation GOST R ISO 11095-2007 using the standard and internal RMs - aqueous ethanol solutions in different concentrations. Measurements were performed for two subranges of ethanol concentrations on standard and internal RMs in accordance with the certified method.

Results and conclusion: Control charts based on experimental data confirmed that the system was in a controlled state, and the calibration function required no updates on Day 7. No studied values fell outside the upper and lower control limits on the control charts. The uncertainty of the transformed values was assessed during the calibration function validation.