Production of purified water and the measurement of its quality in terms of ionic impurities : peer reviewed original article

Abstract

Contaminants in most municipal feed water supplies make it unsuitable to be used directly in laboratory practice. Pure water today is the most frequently used reagent in laboratories. Several water purification systems are available, which use either a deionisation or a reverse osmosis process, or both. Selecting the water quality you need, is therefore an important step when purchasing a water purification system. Operating and maintaining a high purity water system is crucial for laboratory applications, yet many assigned with the task of monitoring their water quality fail to grasp the challenges involved. It is therefore important to gain an understanding of the measuring principles involved. The aim of this paper is to explain conductivity and resistivity measuring principles to enable laboratories to verify acceptable water quality levels.