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Evaluation of Dilute-and-shoot and Solid-phase Extraction Methods for the Determination of S-metolachlor and Metolachlor-OA in Runoff Water Samples by Liquid Chromatography tandem Mass Spectrometry

Abstract

In this study, two fast methods, i. e., the dilute-and-shoot one and the solid-phase extraction (SPE) procedure, were evaluated for the determination of S-metolachlor and metolachlor-OA in runoff water samples by Liquid Chromatography tandem Mass Spectrometry (LC-MS/MS). Limits of quantification of both analytes were 2 μg L-1 and 0.02 μg L-1, by dilute-and-shoot and SPE, respectively. Good accuracy (86-114%) and precision (≤ 20%) were found. Besides, the methods were statistically similar. Thus, firstly, dilute-and-shoot is a promising alternative to analyzing samples with high levels of both analytes. Secondly, samples with low levels of both analytes can be submitted to SPE. Both methods were successfully employed, since they enabled the determination of S-metolachlor and metolachlor-OA in runoff water samples at concentrations between 0.082 and 267 μg L-1.

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Publication details

The article was received on 11 Jul 2017, accepted on 06 Sep 2017 and first published on 07 Sep 2017


Article type: Paper
DOI: 10.1039/C7AY01698K
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Evaluation of Dilute-and-shoot and Solid-phase Extraction Methods for the Determination of S-metolachlor and Metolachlor-OA in Runoff Water Samples by Liquid Chromatography tandem Mass Spectrometry

    J. L. D. O. Arias, A. Schneider, J. A. Batista-Andrade, A. A. Vieira, V. R. Gehrke, E. R. Camargo, S. S. Caldas and E. G. Primel, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01698K

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