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Determining residual chlorine: effect of temperature on the titrametric starch‐iodine end point
Author(s) -
Hatch Gary L.,
Yang Vue
Publication year - 1983
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1983.tb05092.x
Subject(s) - iodine , starch , chlorine , residual , chemistry , end point , biochemistry , organic chemistry , mathematics , algorithm , geometry
A quantitative analysis of the effect of temperature on the titrametric starch‐iodine end point demonstrates that when low concentrations of residual chlorine are determined, the temperature of the sample solution must be kept below 20° C for maximum accuracy. A mechanism for the thermal decolorization of the blue starch‐iodine complex is proposed.