NDLI: Estimating sampling and analysis uncertainties to assess the fitness for purpose of a water quality monitoring network

Content Provider	Springer Nature Link
Author	Guigues, Nathalie Desenfant, Michèle Lalere, Béatrice Vaslin Reimann, Sophie Eyl, Damien Mansuit, Philippe Hance, Emmanuel
Copyright Year	2015
Abstract	In order to verify that the protocols used for water quality monitoring of surface waters within the Long-term Environmental Research Monitoring and Testing System (OPE), located in the north-eastern part of France in relation with a geological disposal for radioactive waste project, are fit for purpose, a validation study was conducted following the methodology described in the Eurachem/citac and Nordtest guidance documents on uncertainty arising from sampling. As one of the objectives of the OPE water monitoring programme was to investigate the spatial and temporal variability of water quality, quality requirements were set to having a measurement variance, including sampling and analytical contributions, less than 20 % of the total variance to minimise the impact of measurement over the observed environmental variability. The replicate method was then selected in order to estimate the measurement uncertainty, including the sampling contribution, as well as the spatial and temporal variability of water quality of surface waters. To minimise costs, a single-split level was selected. Analytical uncertainties were assessed from inter-laboratory data and/or internal quality control data from the last 2–5 years. Finally, ANOVA was applied to the data sets after elimination of outliers. Results showed that for pH, electrical conductivity, turbidity and nitrate, the sampling uncertainty was negligible, whereas for other parameters such as dissolved oxygen, total suspend solids, total organic carbon, nitrite and phosphate, the sampling contribution to the measurement uncertainty was largely significant. For all parameters except calcium, the sampling and analytical protocols were considered fit for purpose.
Starting Page	101
Ending Page	112
Page Count	12
File Format	PDF
ISSN	09491775
Journal	Accreditation and Quality Assurance
Volume Number	21
Issue Number	2
e-ISSN	14320517
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-12-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Uncertainty arising from sampling Uncertainty arising from analysis Fitness for purpose of water quality monitoring Analytical Chemistry Food Science Biochemistry Commercial Law Ecotoxicology Marketing
Content Type	Text
Resource Type	Article
Subject	Chemistry Instrumentation Chemical Engineering Safety, Risk, Reliability and Quality

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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