Abstract
pH Measurements were carried out by means of cells containing Pt/hydrogen and glass electrodes, both equipped with the same type of ground glass sleeve junction carefully selected with respect to the leak rate. The cells were calibrated with the same set of standard buffers using multiple point calibration with linear regression. The slopes of the regression lines were compared with the theoretical (Nernst) slope of the E versus pH function and yielded the electromotive efficiency of the two cells. The accuracy of the measurements was obtained from the residual liquid junction potential errors.
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