Even though pH measurement is one of the most often used analytical methods in chemistry and is considered rather simple to perform, several factors have to be taken into account to obtain accurate and precise measuring results. The accompanying article for the two webinars on pH measurement summarizes the most important points. In the first part of the webinar the focus lies on the basics of pH measurement. It gives further insights on which parameters have a direct influence on pH measurement and how to control them as well as electrode selection, maintenance and storage. The second part of the webinar targets troubleshooting of common errors, and tips and tricks for a correct pH measurement in matrices other than simple aqueous solutions.