Measurement of organochlorine pesticides in drinking water: laboratory technical proficiency testing in Mexico

  • J. B. Leyva-MoralesEmail author
  • P. J. Bastidas-Bastidas
  • R. Muñiz-Valencia
  • S. G. Ceballos Magaña
  • G. Ponce-Vélez
  • D. Aguilera-Márquez
  • P. Grajeda-Cota
  • M. S. Navidad-Murrieta
  • M. E. Flores-Munguía
  • J. A. Ramírez-Castillo
  • C. A. Romero-Bañuelos
  • R. Ruíz-Ramos
  • G. Aguilar-Zarate
  • G. Huerta-Beristain
Practitioner's Report


An interlaboratory comparison exercise was performed to assess the technical proficiency of laboratories in measuring the organochlorine pesticides in drinking water. The homogeneity and stability of the samples to be used in the test were evaluated, the assigned value and the standard deviation were determined according to ISO Guide 35 and ISO standard 17043, and the results showed that the samples were homogeneous and stable for the study period. The test samples (previously verified, as pesticide-free) and the fortifying solution were distributed to nine laboratories in Mexico and analyzed using their own established analytical methods. The pesticides in the fortifying solution were aldrin, β-endosulfan, heptachlor, lindane (γ-HCH), and p,p′-DDE. The assigned values and reference standard deviations were compared with those obtained by each laboratory to determine the z-score for each pesticide and laboratory, and the results are shown graphically for each pesticide. The acceptable z-scores obtained by the participating laboratories were 20 %, 20 %, 20 %, 40 %, and 16.7 % for aldrin, β-endosulfan, heptachlor, lindane, and p,p′-DDE, respectively. This study also provides a summary of the sample preparation and chromatographic techniques used by the participating laboratories, which highlights the technical problems revealed by the interlaboratory exercise.


Quality control Assigned value z-score Intercomparison Pesticides Drinking water 



Funding was provided by Red de Toxicologia de Plaguicidas CONACYT (Project Number 294303).

Supplementary material

769_2019_1403_MOESM1_ESM.docx (134 kb)
Supplementary material 1 (DOCX 129 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • J. B. Leyva-Morales
    • 1
    Email author
  • P. J. Bastidas-Bastidas
    • 2
  • R. Muñiz-Valencia
    • 3
  • S. G. Ceballos Magaña
    • 4
  • G. Ponce-Vélez
    • 5
  • D. Aguilera-Márquez
    • 6
  • P. Grajeda-Cota
    • 7
  • M. S. Navidad-Murrieta
    • 8
  • M. E. Flores-Munguía
    • 9
  • J. A. Ramírez-Castillo
    • 10
  • C. A. Romero-Bañuelos
    • 11
  • R. Ruíz-Ramos
    • 12
  • G. Aguilar-Zarate
    • 13
  • G. Huerta-Beristain
    • 14
  1. 1.Consejo Nacional de Ciencia y Tecnología-Universidad Autónoma de Nayarit, Secretaría de Investigación y PosgradoCentro Nayarita de Innovación y Transferencia de Tecnología, A.C. (CENITT)TepicMexico
  2. 2.Centro de Investigación en Alimentación y Desarrollo, A.C. (Unidad Culiacán)CuliacánMexico
  3. 3.Facultad de Ciencias QuímicasUniversidad de ColimaCoquimatlánMexico
  4. 4.Facultad de CienciasUniversidad de ColimaColimaMexico
  5. 5.Laboratorio de Contaminación Marina, Unidad Académica de Procesos Oceánicos y Costeros, Instituto de Ciencias del Mar y LimnologíaUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMexico
  6. 6.Centro de Investigación en Alimentación y Desarrollo A.C. (Unidad Guaymas)GuaymasMexico
  7. 7.Centro de Investigación en Alimentación y Desarrollo, A.C. (Unidad Hermosillo)HermosilloMexico
  8. 8.Centro Nayarita de Innovación y Transferencia de Tecnología, A.C. (CENITT)-Universidad Autónoma de NayaritTepicMexico
  9. 9.Centro de Investigación en Alimentación y Desarrollo, A.C. (Unidad, Hermosillo)-Laboratorio de Residuos TóxicosHermosilloMexico
  10. 10.Centro Nacional de Prevención de DesastresCiudad de MéxicoMexico
  11. 11.Laboratorio de Contaminación y Toxicología Ambiental, Secretaria de Investigación y PosgradoUniversidad Autónoma de NayaritTepicMexico
  12. 12.Facultad de MedicinaUniversidad VeracruzanaVeracruzMexico
  13. 13.Centro de Investigación en Alimentación y Desarrollo, A.C. (Unidad Mazatlán)MazatlánMexico
  14. 14.Laboratorio de Investigación en Biotecnología, Facultad de Ciencias Químico BiológicasUniversidad Autónoma de GuerreroChilpancingoMexico

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