Post-ion-chromatography derivatization for the determination of oxyhalides at sub-PPB levels in drinking water

Analytical Chemistry
H S Weinberg, H Yamada

Abstract

A new ion chromatographic method is presented that successfully determines iodate, chlorite, and bromate in drinking water at practical quantitation limits of 0.1, 0.4, and 0.2 microgram/L, respectively. Sample pretreatment is not required. The sensitivity of detection is enhanced by conversion of the eluting oxyhalides into the tribromide ion by a postcolumn reaction with bromide under acidic conditions. Spectrophotometric detection of the tribromide ion is at 267 nm. Optimization of the reaction conditions was studied, and the effective operating parameters are presented. The method detected significant levels of bromate in bottled water as well as low levels of iodate in tap water. All results were quality assured, and spike recoveries were in the range 94-110%. The method is applicable to a wide range of waters containing high levels of ions and organic carbon.

References


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Citations

Aug 24, 2004·Analytical and Bioanalytical Chemistry·Giovanni PezzatiniMassimo Innocenti
Dec 18, 2002·Journal of Pharmaceutical and Biomedical Analysis·Yuko KitamakiToyohide Takeuchi
Jul 19, 2008·Journal of Toxicology and Environmental Health. Part a·Richard J MiltnerJane Ellen Simmons
Nov 15, 2011·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Koji KosakaMichihiro Akiba
Nov 5, 2004·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yuko Kitamaki, Toyohide Takeuchi
Sep 9, 2009·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Howard S Weinberg
Nov 1, 2017·Expert Review of Anti-infective Therapy·Michael R Hamblin
Aug 5, 2000·Journal of Chromatography. a·W W Buchberger
Jun 29, 1999·Analytical Chemistry·S D Richardson
Dec 31, 2005·Environmental Science & Technology·George TangBenito J Mariñas
Aug 7, 2003·Environmental Science & Technology·Howard S WeinbergVasu Unnam

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