Alkalinity measurement Part 1 – A 4 pH point titration method to determine the carbonate weak acid/base in an aqueous solution

Abstract

Theory of a 4 pH point acid titration method is presented to measure the H,CO, alkalinity and the total carbonate species (Cr) in aqueous solutions containing only the carbonate weak acid/base. CO, alkalinity is examined, and methods presented to minimise the influence of the error. on aqueous NaHCO, solutions ranging from 10 to 50 mg/ as CaCO, gave closely equal results with r NARCO, solutions ranging IrOn 1 100 to 1 750 mg/ as CaCO, the 4 ph point titration method has high accuracy, and a standard deviation of < 2 per cent.

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