METHOD AND APPARATUS FOR PHOTOMETRICALLY MONITORING THE CONCENTRATION OF BOTH CHLORINE AND CHLORINE DIOXIDE

摘要

A method and an apparatus for photometrically analyzing a stream under test containing both chlorine and chlorine dioxide is characterized by heating a portion of the stream to decompose any chlorine dioxide therein into elemental chlorine. This heated portion of the stream is photometrically analyzed to determine the concentration of chlorine produced by the decomposition of chlorine dioxide, taking into account the concomitant dilution produced thereby.