Primary level electrolytic conductivity measurements at National Metrology Institute of Turkey (TUBITAK UME)

Abstract

TUBITAK UME (National Metrology Institute of Turkey) Electrochemistry Laboratory established theprimary level electrolytic conductivity measurement system in 2018. The objective of this work is to prove theaccuracy of the established system with an acceptable uncertainty and to disseminate the traceability forelectrolytic conductivity measurements. While the accuracy of the system was tested with the certified conductivitysolutions, the accuracy of the software developed at TUBITAK UME was also tested. The cell constant wasdetermined as 0.57986 cm-1at 25 °C by using certified conductivity solutions. The accuracy of the system wasevaluated using the measurement of certified conductivity solutions and it was found that there was no significantdifference between the results at 95% confidence level. Finally, “Evaluation of measurement data - Guide to theexpression of uncertainty in measurement” and “EA-4/02 M: 2013 Evaluation of the Uncertainty of Measurementin Calibration” guides were used to form the uncertainty budget for primary level electrolytic conductivitymeasurements.