On-line monitoring of nine haloacetic acid species at the microgL(-1) level using post-column reaction-ion chromatography with nicotinamide fluorescence

• Published in: Analytica chimica acta Vol. 654; no. 2; pp. 133 - 140
• Main Authors: Simone, Jr, Paul S, Ranaivo, Patricia L, Geme, Gija, Brown, Michael A, Emmert, Gary L
• Format: Journal Article
• Language: English
• Published: Netherlands 10.11.2009
• ISSN: 1873-4324
• DOI: 10.1016/j.aca.2009.09.021

A laboratory-built automated instrument is reported for on-line, near real-time monitoring of nine haloacetic acids species (HAA9) in drinking water. The device uses anion-exchange chromatography to separate the HAA9 species, followed by post-column reaction with nicotinamide in basic solution with fluorescence detection. Method detection limits for HAA9 species ranged from 0.6 to 10.1microgL(-1), mean % recovery values ranged from 58 to 161%, and % relative standard deviation ranged from 3.5 to 32% while operating within a factor of 2.5-5 of the method detection limit. The bias between the proposed method and United States Environmental Protection Agency Method 552.3 was measured during two separate on-line studies and using grab samples collected from different distribution systems. In general, the two methods showed good agreement with biases for HAA9 of less than 10microgL(-1).