Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
46, Number 7, August 2008, pp. 591-595
Development of a Size Exclusion Chromatography– Electrochemical
Detection Method for the Analysis of Total Organic and Inorganic
Chloramines
Fariba Amiri and Susan Andrews
University of Waterloo, Department of Civil and Environmental
Engineering, 200 University Avenue West, Waterloo, ON N2L 3G1,
Canada
A size exclusion chromatography (SEC) followed
by post-column reaction with iodide and electrochemical detection
method is developed for analysis of total organic and inorganic
chloramines. Ammonium chloride and a group of test compounds
(Glycine, Tyrosine, DL-Alanyl-DL-Alanine, Arg-Gly-Asp-Ser, Bradykinin,
Aprotinin, and α-Lactalbumin) are selected and chlorinated
to represent inorganic chloramines and different sizes of organic
N-chloramines. An analytical SEC column with pore size of 60Å is
used and chromatographic conditions including the working electrode
potential and flow rate are optimized to gain optimum resolution
and sensitivity. The detection limits are estimated to be 0.12
mg/L and 0.05 mg/L, respectively, for tested inorganic and organic
chloramines.
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