Linear Plot of Brosset's Function for the Slope of Gran's Plot: a useful Method for simultaneous Determination of Concentration and pk-Value of a weak Acid

A method for the simulataneous determination of the concentration and pk-value of a weak acid was developed. The method is based on a linear plot of Brossets function for the slope of Gran·s plot. The usefulness of the method has been demonstrated in an investigation of weak acids (humic acids) in lake water