Method for determining the pH value of deionized water
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What methods do you all use to measure the pH value of deionized water used in boilers? How effective is a pH electrode for measuring pure water?
My previous workplace used both the pH measurement method and the conductivity measurement method, with one used to correct the other.
This post was last edited by qugd on 2017-12-11 at 10:47. The pH of desalinated water must be measured using a pH measurement system designed for pure water, with specific requirements for its electrodes and flow cells. Some major manufacturers of water quality analyzers offer specialized configurations and options for measuring pure water pH. For water with a specific conductivity of less than 50 uS/cm, it is best to use a pure water pH measurement system. Since pure water is highly susceptible to the influence of air and pollutants during sampling container use, sample transfer, and other processes, it is recommended to use online measurement methods.
A domestic pH meter will do; we all use those from Shanghai Leici
We use Leicai’s pure water electrodes, but they are also unstable and require the addition of potassium chloride solution