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MICROEXTRACTION OF NINE HALOACETIC ACIDS IN DRINKING WATER AT MICROGRAM PER LITER LEVELS WITH ELECTROSPRAY-MASS SPECTROMETRY OF STABLE ASSOCIATION COMPLEXES
Citation:
Magnuson*, M L. AND C A. Kelty*. MICROEXTRACTION OF NINE HALOACETIC ACIDS IN DRINKING WATER AT MICROGRAM PER LITER LEVELS WITH ELECTROSPRAY-MASS SPECTROMETRY OF STABLE ASSOCIATION COMPLEXES. Analytical Chemistry. American Chemical Society, Washington, DC, 72(10):2308-2312, (2000).
Description:
Haloacetic acids are disinfection by-products of the chlorination of drinking water. This paper presents the analysis of all nine chloro- and bromo-haloacetic acids (HAA9) at sub- ug L-1 by microextraction with detection by electrospray mass spectrometry. The haloacetic acids are extracted from acidified water through a microscale liquid-liquid extraction. Perfluoro heptanoic acid is added to the extracts, and the haloacetic acids detected with electrospray mass spectrometry. Confidence in the selective quantification of haloacetic acid is achieved by observing the stable association complexes that are formed between the haloacetic acid and perfluoro heptanoic acid. The method detection limits for the haloacetic acids are less than 1 ug L-1. Standard addition was used to quantify the haloacetic acids in several water matrices.