SEARCH Articles Figures Tables Boxes junction potential Boxes rainwater Effect measure Effect of pH Error junction potential Error measure Error measurement Errors in potential In rainwater Junction potential Measure of effect Measuring pH PH effective PH effects PH measurement PH of rainwater PH potential Potential measurement Potential measurement error Potential of PH Rainwater measurements Systematic Potentials Systematic effects Systematic errors The Box The Effect of pH The Effective Potential The measurement of pH