The Effect of the Ionic Product of the Water on On-line pH Value Monitoring
The pH value of the medium is a crucial process parameter in refining and production,which necessitates accurate online monitoring and calibration using laboratory measurements.However,this approach overlooks the potential discrepancies caused by temperature variations between online and laboratory measurements,as well as differences in electrode types during measurement.Consequently,these practices can lead to deviations in production process control,resulting in waste or compromising product quality.To address this issue comprehensively,theoretical analysis was conducted and subsequently validated through both laboratory experiments and on-site trials.The results revealed that temperature has a negligible impact on the pH value of aqueous solutions with a pH below 5,however,it exerts a significant influence on solutions with a pH above 9.Furthermore,while the pH values measured by reference electrodes employing saturated calomel are consistent with theoretical values,differential electrode measurements do not align with theoretical data.
pH valueion product of wateron-line monitoringtemperatureimpact
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万方数据
维普
