Trace analysis of trimethoprim and sulfonamide, macrolide, quinolone, and tetracycline antibiotics in chlorinated drinking water using liquid chromotagrphy electrospray tandem mass spectrometry

Analytical Chemistry
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Abstract

A multirun analytical method has been developed and validated for trace determination of 24 antibiotics including 7 sulfonamides, 3 macrolides, 7 quinolones, 6 tetracyclines, and trimethoprim in chlorine-disinfected drinking water using a single solid-phase extraction method coupled to liquid chromatography with positive electrospray tandem mass spectrometry detection. The analytes were extracted by a hydrophilic−lipophilic balanced resin and eluted with acidified methanol (0.1% formic acid), resulting in analyte recoveries generally above 90%. The limits of quantitation were mostly below 10 ng/L in drinking water. Since the concentrated sample matrix typically caused ion suppression during electrospray ionization, the method of standard addition was used for quantitation. Chlorine residuals in drinking water can react with some antibiotics, but ascorbic acid was found to be an effective chlorine quenching agent without affecting the analysis and stability of the antibiotics in water. A preliminary occurrence study using this method revealed the presence of some antibiotics in drinking waters, including sulfamethoxazole (3.0−3.4 ng/L), macrolides (1.4−4.9 ng/L), and quinolones (1.2−4.0 ng/L).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Trace analysis of trimethoprim and sulfonamide, macrolide, quinolone, and tetracycline antibiotics in chlorinated drinking water using liquid chromotagrphy electrospray tandem mass spectrometry
Series title Analytical Chemistry
DOI 10.1021/ac060972a
Volume 79
Issue 3
Year Published 2007
Language English
Publisher American Chemical Society
Contributing office(s) Toxic Substances Hydrology Program
Description 10 p.
First page 1135
Last page 1144
Online Only (Y/N) N
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