Affiliations: College of Environmental Science and Engineering,Hebei
University of Science and Technology,Shijiazhuang 050018,China,
E-mail:wanggaizhen@yahoo.com | Department of Chemistry,Northwest Normal
University,Lanzhou 730070,China | Shijiazhuang Water Supply and Eleetric Power Segment
Engineering Dept.,Shijiazhuang Railroad Branch Dept.,China
Abstract: A novel,simple,rapid,sensitive and highly selective flow injection
procedure for the spectrophotometrie determination of chlorine dioxide in the
presence of other chlorine species,viz,free chlorine,chlorite,chlorate and
hypoehlorite,is developed.The method is based on the discoloration reaction
between chlorine dioxide and chlorophenol red and can overcome the shortcomings
existed in direct speetrophotometrie determination for chlorine dioxide owing
to the serious interference of free and combined chlorine.The procedure gave a
linear calibration graph over the range 0-0.71 mg/L of chlorine dioxide.With a
detection limit of 0.024 mg/L and a sample throughput of 60 samples/h.
