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Analysis of P-chlorobenzoic Acid in Water by Liquid Chromatography–tandem Mass Spectrometry by Brett J. Vanderford; Fernando L. Rosario-Ortiz; Shane A. Snyder is a Chemistry article available to read on EtoBox.

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para-Chlorobenzoic acid (p-CBA) is typically used as a probe compound to indirectly quantify hydroxyl radicals formed during advanced oxidation processes used in drinking water and wastewater treatment. A method has been developed for the sensitive analysis of p-CBA in water using liquid chromatography-tandem mass spectrometry (LC-MS/MS). A reporting limit in water of 100 ng/L was determined for the method, which is 40-fold lower than the 4.0 microg/L reporting limit of the widely used liquid chromatography with UV detection (LC-UV) method. The method was found to be robust in difficult matrices such as wastewater and highly selective, unlike LC-UV which relies on non-specific detection at 234 nm. The detection of p-CBA below 1 microg/L during bench-scale ozonation of wastewater after hydrogen peroxide addition was demonstrated. Duplicate samples were analyzed by LC-MS/MS and LC-UV and results were found to be comparable at concentrations quantifiable by both methods.

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Author

Brett J. Vanderford; Fernando L. Rosario-Ortiz; Shane A. Snyder

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)