Quality improvement in determination of chemical oxygen demand in samples considered difficult to analyze, through participation in proficiency-testing schemes

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DOIResolve DOI: http://doi.org/10.1016/j.trac.2010.06.005
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TypeArticle
Journal titleTrends in analytical chemistry
Volume29
Issue9
Pages10821091; # of pages: 10
SubjectAnaerobic digestion; Chemical oxygen demand; COD; Interlaboratory study; Liquid sample; Proficiency testing; Solid sample; Suspended solids; Waste treatment; Wastewater treatment
AbstractChemical oxygen demand (COD) is a critical analytical parameter in waste and wastewater treatment, more specifically in anaerobic digestion, although little is known about the quality of measuring COD of anaerobic digestion samples. Proficiency testing (PT) is a powerful tool that can be used to test the performance achievable in the participants' laboratories, so we carried out a second PT of COD determination in samples considered " difficult" to analyze (i.e. solid samples and liquid samples with high concentrations of suspended solids). The results obtained (based on acceptable z-score values) may be considered satisfactory. When compared with the results of a previous similar scheme, the overall performance improved by around 30%, again demonstrating that analytical performance can be improved by regular participation in PT.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Biotechnology Research Institute
Peer reviewedYes
NRC number53339
NPARC number16157249
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Record identifier3579cad5-35b1-4f1b-9916-5d5ae21fc279
Record created2010-11-05
Record modified2016-05-09
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