Published: Jan 1960
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(a) These methods cover the determination of acidity and basicity (alkalinity) in industrial water and industrial waste water. Procedures are given for the determination of a titration curve that will define the inflection points and the buffering capacity, and for the determination of acidity or basicity (alkalinity) to a predesignated pH end point. Three methods are given, as follows: (b) The Referee Method is electrometric and is the most precise and accurate of the three methods. Non-Referee Method A depends on the matching of colors with those of buffered standards and is satisfactory for routine control use, provided the sample contains no buffering materials at the end point. Non-Referee Method B depends upon the color change of an indicator during the course of a titration and is suitable for routine use, providing the sample contains no buffering materials at the end point.