Direct detection of chlorpropham on potato skin using desorption electrospray ionization

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Author(s) Berchtold, Christian, Müller, Vivian, Meier, Lukas, Schmid, Stefan, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Direct detection of chlorpropham on potato skin using desorption electrospray ionization
Author(s) Berchtold, Christian
Müller, Vivian
Meier, Lukas
Schmid, Stefan
Zenobi, Renato
Journal or Series Title Journal of mass spectrometry
Volume Number 48
Issue Number 5
Start Page 587
End Page 593
ISSN 1076-5174
Publisher Wiley
Publication Place Chichester
Publication Date 2013-05
Keyword(s) DESI
Crop surfaces
Direct quantification
Mass spectrometry
Abstract Most pesticides, herbicides and other plant treatment agents are applied to the crop surface. Direct mass spectrometric methods, such as desorption electrospray ionization (DESI), offer new ways to analyze plant samples directly and rapidly. A strategy for the development and optimization of a DESI method for the direct determination of chemicals on complex surfaces is described. Chlorpropham (CP) was applied to potato surfaces as an example for a crop protection agent and analyzed using a self-made DESI source. Aspects such as instrument selectivity, sensitivity and reproducibility were investigated. The MS4 fragmentation pattern of CP was analyzed to achieve the necessary detection selectivity, and is discussed in detail. Similar fragmentation was found in the ESI and DESI mass spectra, indicating that the mechanisms of ESI and DESI are closely related. A DESI method for semi-quantification of CP on potatoes was developed. Detection limits of 6.5 mu g/kg were found using MS/MS. The reproducibility, in the range of 12% (signal variation), appears to be sufficient for semi-quantitative measurements.
DOI 10.1002/jms.3197
Additional Notes Received 30 November 2012, Revised 9 February 2013, Accepted 13 February 2013, Published online 23 April 2013
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
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NEBIS System Number 001410098
Source Database ID WOS-000318988100008
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  author = "Berchtold, Christian and M{\"{u}}ller, Vivian and Meier, Lukas and Schmid, Stefan and Zenobi, Renato",
  title = "{D}irect detection of chlorpropham on potato skin using desorption electrospray ionization",
  journal = "Journal of mass spectrometry",
  year = 2013,
  volume = "48",
  number = "5",
  pages = "587--593",
  month = may,

E-Citations record created: Mon, 24 Jun 2013, 06:39:41 CET