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 Application Notes
  ABC, Alkalinity 3rd endpoint
 Log #337C Titration Application Note
 Total, effective and active alkali, sulfidity and causticity concentrations are determined in a sequence using the ABC Preset Endpoint titration technique with an Orion pH electrode, and hydrochloric acid as the titrant.  The Orion 960 Autotitrator PLUS determines the endpoints and calculates the concentrations of the desired species in the sample.  This note describes the method for the third endpoint (pH 4.1).