Methods in Potentiometric Titration End Point Determination

• Direct Plot

  • Most straightforward one.
• Direct Plot

  • Involves a direct plot of potential as a function of reagent volume.
• Direct Plot

  • The midpoint in the steeply rising portion of the curve is estimated visually and taken as the end point.
• Derivative Curves

  • First Derivative Curve – calculating the change in potential or pH per unit volume of titrant.
• Derivative Curves

  • A plot of △pH/ △V as a function of corresponding reagent volume produces a curve with a maximum that corresponds to the point of inflection.