The stability study of electrolytic conductivity synthetic wastewater

Abstract

Abstract The accurate and traceable measurement of electrochemical parameters, such as electrolytic conductivity, in water environment is crucial for water quality monitoring. This can be achieved by the use of metrological traceable certified reference material produced according to ISO 17034. It requires stability test of the reference material candidate as part of the certification for a new reference material. This study is focused on monitoring of the stability of electrolytic conductivity synthetic wastewater, as an example of complex solution containing high concentration of ions. The stability study is focused on the material of the packaging bottle, the shelf-life duration and the high temperature representing a shipping condition. The results demonstrate that the electrolytic conductivity synthetic wastewater is stable for all the conditions tested, but the synthetic wastewater packaged in glass bottle has longer shelf-life. The results confirmed that the synthetic wastewater has potential to be developed as a certified reference material.