Analytical Technology has announced the availability of a free technical note entitled 'Calibration of Dissolved Ozone Monitors on Ultra Pure Water Loops'.
The note discusses the use of ozone for disinfection and the importance of calibration accuracy in monitors measuring dissolved ozone for pharmaceutical grade water.
It is designed to accompany the Q45H/64 Dissolved Ozone Monitor from Analytical Technology and examines common methods of calibration for dissolved ozone monitors, including air calibration and the use of a colorimeter.
The Q45H/64 monitor is calibrated using the only method approved by the International Ozone Association, Method 4500 Indigo Dye.
Using a colourimeter and indigo dye reagents it is possible for users to carry out on-site, in situ calibrations for this monitor.
There has been a significant increase in the use of ozone for the disinfection of ultra pure water systems in the pharmaceutical and medical industries.
Ozone is commonly used for microbial disinfection during the sanitisation of pharmaceutical grade water which is present in process systems such as washers, autoclaves and secondary water purification systems.
The technical application note illustrates the importance of monitoring levels of dissolved ozone at various points in the water network in order to ensure that adequate ozone levels are present during sanitisation.
The calibration of dissolved ozone monitors operating in the pharmaceutical and medical industries is essential and is often made difficult by the reactivity and half-life of the ozone in water.
