A single automated instrument for monitoring total trihalomethane and total haloacetic acid concentrations in near real-time

Analytica Chimica Acta
Gary L EmmertPaul Simone

Abstract

A single instrument is presented for selectively measuring the concentrations of total trihalomethanes (THM4) and total haloacetic acids (HAA9) directly from drinking water distribution systems. The method is based on the fluorescence reaction of THM4 or HAA5 species with nicotinamide. The method detection limit (MDL) for THM4 was 2.5 microg L(-1) with mean % recovery of 108% and % relative standard deviation (% R.S.D.) of 4%. For HAA5, the MDL was 3.3 microg L(-1) with mean % recovery and % R.S.D. of 102% and 3.5%, respectively. Side-by-side comparisons to United States Environmental Protection Agency methods (Methods 502.2 and 552.3) in chlorinated and chloraminated distribution systems exhibited reproducible biases that ranged from approximately 0.2 to 5 microg L(-1) for THM4 and from approximately -0.7 to -27 microg L(-1) for HAA5. The device provides for automated on-line sampling and analysis of THM4 and HAA9 with hourly sample analysis rates and is effectively a real-time system for drinking water monitoring.

References

Dec 15, 2004·Journal of Chromatography. a·Roger Guevremont
Feb 29, 2008·Journal of Chromatography. a·Maria Concetta BruzzonitiPéter Hajós

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Citations

Jun 15, 2011·Analytical Chemistry·Susan D Richardson, Thomas A Ternes
Sep 6, 2020·Environmental Pollution·Arun Lal SrivastavVinod Kumar Chaudhary
May 27, 2010·Analytical Chemistry·Susan D Richardson

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