Patent ID: 6635147
Filing Date: 2003-10-21
Classification: D21C,G01N

Abstract:
A method of determining chemical species in a boron-containing alkaline wood pulping liquor sample comprising the steps of:(i) subjecting a first aliquot portion of the boron-containing sample to a primary acid titration analysis to derive multiple equivalence points at different respective pH values; (ii) subjecting a second aliquot portion of the boron-containing sample to an analysis by an analytical method other than acid titration, to determine the quantitative presence of boron or sulfide ions therein; and then (iii) determining algorithmically the quantitative presence in the boron-containing sample of at least one additional chemical species selected from the group consisting of metaborate, carbonate, hydroxide and sulfide species, other than the chemical species determined in step (ii), based on the combined analytical results of steps (i) and (ii), thereby overcoming interference due to the presence of boron in the sample.