University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Chlorine, active

  • InChI: InChI=1S/Cl

@ ChemSpider@ NIST@ PubChem

Citations 2

"Determination Of Microgram And Nanogram Amounts Of Active Chlorine In Water By Iodine - Azide Reaction Induced By Thiosulfate Or Thioammeline"
Anal. Chim. Acta 1991 Volume 252, Issue 1-2 Pages 127-132
Jan Kurzawa*, Zbigniew Kurzawa and Krystyna Janowicz

Abstract: An indirect determination of active Cl in water is described based on the iodine - azide reaction and measuring the amount of thiosulfate (I) or thioammeline (II) oxidized by Cl is described. Three methods based on this principle were applied, viz, back-titration of excess iodine, titration with an iodine reagent and continuous-flow amperometric detection of the released iodine. The working ranges for the determination of Cl by back-titration were 0.2 to 2.4 and 0.02 to 0.14 µg mL-1 in the presence of I and II, respectively, by titration were 0.3 to 2 ng mL-1 in the presence of II and by continuous-flow determination were 0.5 to 5 µg L-1 and 0.05 to 1.5 mg L-1 depending on the reaction conditions and inductor used.
Water Amperometry Titrations

"Iodimetric Flow Injection Determination Of Traces Of Oxidants. 1. Determination Of Iodate And Active Chlorine"
Quim. Anal. 1987 Volume 6, Issue 1 Pages 60-67
Hernandez Mendez, J.;Alonso Mateos, A.;Almendral Parra, M.J.;Garcia De Maria, C.

Abstract: To determine IO3-, the sample solution (0.1 to 12 µg mL-1; 126 µL) is injected into a carrier stream (3.3 mL min-1) of water and this stream merges with one (3.0 mL min-1) of 0.04 M KI in 0.02 M H2SO4. The mixture passes through a knotted 40-cm reaction coil to a 30 µL flow cell, where the absorbance is measured at 350 nm. For active Cl, the solution (0.2 to 7 µg mL-1; 126 µL) is injected into a carrier solution (3.0 mL min-1) of pH 3.5 to 10.0, which merges with a stream (3.0 mL min-1) of 0.04 M KI. The determination is completed as before. The coefficient of variation for IO3- or active Cl (0.5 µg mL-1) was 2.5% (n = 10 in each instance). The method for Cl was applied to water samples.
Environmental Spectrophotometry Indirect Knotted reactor