Estimation of total uncertainty : application in titrimetric methods

Abstract

This attempt was taken in order to estimate the uncertainties associated in acidity determinations.Three titrimetric methods were used. The most important sources of uncertainty, such as, the uncertainty of pH measurements, accuracy of volume measurementsand the uncertainty of weighing were discussed using appropriate cause and effectdiagrams.It was found from the results that the major contribution towards the final valuewasfromthe volume delivery uncertainty. Second major contribution was found to be from the weighing measurements. Finally the combined uncertainty contributions on the finaltest results of the three methods and the possibility of reducing the overall uncertainty wereaddressed.