Abstract
The effects of the residual streaming potential and residual junction potential on the accuracy of pH and acidity measurements are discussed and quantified. Detailed analytical procedures minimizing these effects are described; a Gran's titration is used to assess total and strong acidity. The procedure for pH determination is shown to have a precision and accuracy of +/-0.01 pH unit. The acidity procedure shows acceptable accuracy and mean precision values (expressed as relative standard deviations) of 1.4% and 3.4% are obtained for strong and total acidity on the intervals 24-97 and 34-110 ..mu..equiv of H/sup +//L.
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