How to select a high-temperature pH meter
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This post was last edited by Chemical industry workers are frustrated on 2018-6-25 at 17:50. As the title suggests, I am seeking advice on how to select a pH meter for use in high-temperature conditions: 1. The working environment is a solution in sulfuric acid at 90°C; 2. The pH of the solution is approximately between 0 and 2; 3. There are a large number of graphite particles present. How do I choose an industrial pH meter with an error of ±0.1?
First, install the temperature reduction device, then insert the pH electrode into the medium after temperature reduction and conduct the measurement
For all PH probes, operating in a continuous high temperature of 80 degrees is a significant challenge! It’s no problem for the temperature to exceed 80 degrees in an instant. When a pH meter is used for extended periods at temperatures above 80 degrees, its lifespan drops significantly. With such high temperatures plus friction from solid particles, its lifespan is likely to be very short. The method upstairs is good
I agree with the method on the second floor; it can be considered for adoption.
For such strong acids (a pH of 1 is equivalent to 0.1M hydrochloric acid), it is best not to use a pH meter, as pH measurement is only suitable for acids or bases with very low concentrations. Furthermore, at such temperatures, many pH electrodes cannot be used stably for a long time. If the sample is in a medium primarily consisting of dilute sulfuric acid, a conductivity meter can be used to measure the concentration.
Thank you for all your suggestions. Are there any other methods?