Direct Analysis and Quantification of Metaldehyde in Water using Reactive Paper Spray Mass Spectrometry

Maher, S (2016) Direct Analysis and Quantification of Metaldehyde in Water using Reactive Paper Spray Mass Spectrometry. Scientific Reports, 6 (1). 35643-.

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Abstract

Metaldehyde is extensively used worldwide as a contact and systemic molluscicide for controlling slugs and snails in a wide range of agricultural and horticultural crops. Contamination of surface waters due to run-off, coupled with its moderate solubility in water, has led to increased concentration of the pesticide in the environment. In this study, for the first time, rapid analysis (<~1 minute) of metaldehyde residues in water is demonstrated using paper spray mass spectrometry (PS-MS). The observed precursor molecular ions of metaldehyde were confirmed from tandem mass spectrometry (MS/MS) experiments by studying the fragmentation patterns produced via collision-induced dissociation. The signal intensity ratios of the most abundant MS/MS transitions for metaldehyde (177 → 149 for protonated ion) and atrazine (221 → 179) were found to be linear in the range 0.01 to 5 ng/mL. Metaldehyde residues were detectable in environmental water samples at low concentration (LOD < 0.1 ng/mL using reactive PS-MS), with a relative standard deviation <10% and an R2 value >0.99, without any pre-concentration/separation steps. This result is of particular importance for environmental monitoring and water quality analysis providing a potential means of rapid screening to ensure safe drinking water.

Item Type:	Article
Uncontrolled Keywords:	Analytical chemistry, Mass spectrometry
Depositing User:	Symplectic Admin
Date Deposited:	17 Mar 2017 11:35
Last Modified:	19 Jan 2023 07:19
DOI:	10.1038/srep35643
Open Access URL:	http://www.nature.com/articles/srep35643
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3005728

Available Versions of this Item

• Direct Analysis and Quantification of Metaldehyde in Water using Reactive Paper Spray Mass Spectrometry. (deposited 28 Oct 2016 08:56)
  • Direct Analysis and Quantification of Metaldehyde in Water using Reactive Paper Spray Mass Spectrometry. (deposited 17 Mar 2017 11:35) [Currently Displayed]