You have been redirected to your local version of the requested page

What to consider when standardizing titrant

Apr 16, 2020

Article

If you perform titrations on a regular basis, then you’ve certainly heard about standardization of the titrant. When carrying out a standardization you determine the titer, which is a correction factor for your titrant concentration, as it is normally not exactly the value written on the reagent bottle label. In this blog entry, I want to give you some valuable information about why standardization is important and how to determine the titer.

Please note this blog entry will not deal with the standardization of Karl Fischer titrants. Read the following article for KF titrants.

Titer determination in Karl Fischer titration

 

What is the titer factor?

Titration is an absolute method (or primary method), meaning it is of utmost importance to know the exact concentration of the titrant you are using for your results to be accurate and repeatable by other analysts. This is why you need to carry out a standardization.

Usually the difference between the nominal concentration (e.g., 0.1 mol/L) and the absolute concentration (e.g., 0.0998 mol/L) is given by a dimensionless factor (e.g., 0.0998). The absolute concentration is obtained by multiplying the nominal concentration with this factor, which is usually called «titer». In some cases, it is the absolute concentration which is called «titer».