Study of Pesticide Synthesis Residual Products in Commercial Chlorpyrifos Formulations.

  1. Melgosa, E.R. 1
  2. Barrio, C.S. 1
  3. Asensio, J.S. 1
  4. Bernal, J.G. 2
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

Journal:
Journal of AOAC International

ISSN: 1060-3271

Year of publication: 1997

Volume: 80

Issue: 4

Pages: 717-724

Type: Article

SCOPUS: 2-s2.0-0037717357 WoS: WOS:A1997XL99800004 GOOGLE SCHOLAR

More publications in: Journal of AOAC International

Abstract

A method to separate and identify manufacturing residual products (MRPs) in commercial formulations of chlorpyrifos is presented. The method is based on 3 stages: (1) qualitative study by capillary gas chromatography, (2) separation by liquid chromatography, and (3) identification by mass spectrometry and nuclear magnetic resonance spectroscopy. Using this methodology, the authors identified different MRPs in commercial chlorpyrifos: a phosphorochloridothioic acid O,O-diethyl ester chloride, TCP (3,5,6-trichloropyridin-2-ol), and sulfotep (tetraethyl dithionopyrophosphate). In addition, a compound that has not been described until now, was identified. Given the name "Romerales," the compound has toxicity similar to or greater than that of chlorpyrifos.