An interlaboratory study as useful tool for proficiency testing of chemical oxygen demand measurements using solid substrates and liquid samples with high suspended solid content

Raposo F., de la Rubia M. A., Borja R., Alaiz M., Beltran J., Cavinato C., ...More

TALANTA, vol.80, no.1, pp.329-337, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 80 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.1016/j.talanta.2009.06.071
  • Journal Name: TALANTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.329-337
  • Keywords: Interlaboratory study, Proficiency testing, Chemical oxygen demand, Anaerobic digestion, Homogeneity test, Solid substrate, Suspended solids
  • Middle East Technical University Affiliated: Yes


In 2008, the first Proficiency Testing Scheme of Chemical Oxygen Demand (1(st) COD-PTADG) was conducted to assess the results obtained for different research groups whose field work is mainly anaerobic digestion. This study was performed using four samples, two solid samples as raw materials and two solid samples to prepare high concentration suspended solid solutions. Invitations were sent to a large number of laboratories, mainly to anaerobic digestion research groups. Finally, thirty labs from sixteen countries agreed to participate, but for different reasons four participants could not send any data. In total. twenty-six results were reported to the COD-PT coordinator.