At the first break point

Main document

A commonly used method for determining sodium is to determine the counterion chloride using argentometric titration, the concentration of which can be used to deduce the sodium concentration from the 1:1 stoichiometry of sodium chloride. This method involves errors because sodium is not only present with chloride as the counterion. The direct determination methods known so far are prone to errors due to their complexity. A new method for direct titration of sodium with thermometric endpoint detection solves this problem. Quick, uncomplicated, reliable, and easy to automate, it is suitable for routine checks, in the process as well.