pH Measurement in Sulfide-Bearing Effluents

Process Analytics - «Application Note» 

Background
Environmental concerns and legal requirements in many countries dictate that industrial effluents must be neutralized before being sent on to a filtration plant. Only accurate and reliable pH measurement can guarantee effective automatic neutralization of such effluents. In this process, pH is measured continuously and electrodes must be capable of working with minimum maintenance and without the need for frequent calibration.

Important for accurate pH measurement is the faultless functioning of the reference electrode, which must supply a constant baseline potential. The reference electrode (comprising an internal cell cartridge and the reference electrolyte) is in contact with the sample medium via some type of junction.…..

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