R8 SVP-MEOH EFFICIENCY MEASUREMENT - AN ACCURATE MEASUREMENT IS REPORTED/

The currently accepted method for Cl-2 analysis in ClO2 solution, CPPA J14P, has been found to have small interferences, of the order of +/- 0.05 g/L. When trying to accurately gauge the efficiency of an R8 or SVP-MeOH* at Cl-2 levels of 0.15 to 0.05 g/L, this +/- 0.05 g/L repr esents a relative error of between 33 and 100%. This can lead to an ef ficiency error of between 2 and 4%. The nature of the interferences is described, and then an accurate method to determine Cl-2, useable at the mill site, is presented.