Journal
TALANTA
Volume 82, Issue 2, Pages 668-674Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2010.05.030
Keywords
Atrazine; Direct injection HPLC; Large-volume injection; Monolithic column; Hexazinone; Natural organic matter; Natural waters; Simazine
Categories
Funding
- Water Quality Research Australia
- Melbourne Water
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There is a need for simple and inexpensive methods to quantify potentially harmful persistent pesticides often found in our water-ways and water distribution systems. This paper presents a simple, relatively inexpensive method for the detection of a group of commonly used pesticides (atrazine, simazine and hexazinone) in natural waters using large-volume direct injection high performance liquid chromatography (HPLC) utilizing a monolithic column and a single wavelength ultraviolet-visible light (UV-vis) detector. The best results for this system were obtained with a mobile phase made up of acetonitrile and water in a 30:70 ratio, a flow rate of 2.0 mL min(-1), and a detector wavelength of 230 nm. Using this method, we achieved retention times of less than three minutes, and detection limits of 5.7 mu g L-1 for atrazine, 4.7 mu g L-1 for simazine and 4.0 mu g L-1 for hexazinone. The performance of this method was validated with an inter-laboratory trial against a National Association of Testing Authorities (NATA) accredited liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) method commonly used in commercial laboratories. (C) 2010 Elsevier B.V. All rights reserved.
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