Technical Bulletin No. 0409: A Laboratory Investigation Of An Iodometric Method For Determining Chlorine And Chlorine Dioxide In Pulp and Paper Industry Workplace Atmospheres

This technical bulletin presents results of a laboratory investigation of a method for determining chlorine and chlorine dioxide in (primarily) pulp bleaching area workplace atmospheres. The method is based upon midget impinger sampling into potassium iodide solution, followed by spectrophotometric determination of formed iodine at neutral and acid pH. The method was evaluated according to a NIOSH evaluation protocol, addressing precision and recovery of gas phase chlorine.