Proficiency testing of wastewater sampling: What did we learn?

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• 作者：Magda Cotman ; Albin Pintar
• 关键词：Monitoring parameters ; Proficiency testing ; Sampling uncertainty ; Scoring results ; Wastewater sampling
• 刊名：Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：20
• 期：5
• 页码：387-394
• 全文大小：438 KB
• 参考文献：1.ISO, IEC 17025 (2005) General requirements for the competence of testing and calibration laboratories. International Standard Organization, Geneva
  2.Water Framework Directive Chemical Monitoring Activity鈥擡UR 22922 EN (2007) http://鈥媐ate.鈥媕rc.鈥媏c.鈥媏uropa.鈥媏u/鈥媘onitoring/鈥媋ctivities/鈥媝df-documentsWFD
  3.Ramsey MH, Thompson M (2007) Uncertainty from sampling, in the context of fitness for purpose. Accred Qual Assur 12:503鈥?13CrossRef
  4.ISO, IEC 17043 (2010) Conformity assessment general requirements for proficiency testing. International Standard Organization, Geneva
  5.ISO 13528 (2005) Statistical methods for use in proficiency testing by interlaboratory comparisons. International standard Organization, Geneva
  6.Thompson M, Ellison SLR, Wood R (2006) The international harmonized protocol for the proficiency testing of analytical chemistry laboratories. Pure Appl Chem 78:145鈥?96CrossRef
  7.International Organization for Standardization (ISO), ISO 5667-10 (1992) Water quality sampling鈥攑art 4: guidance on sampling of wastewaters, Geneva
  8.Kurfurst U, Desaules A, Rehnert A, Muntau H (2004) Estimation of measurement uncertainty by the budget approach for heavy metal content in soils under different land use. Accred Qual Assur 9:64鈥?5CrossRef
  9.Gluschke M (2008) Collaborative sampling trial in the context of quality assurance in the German marine monitoring programme for the North Sea and the Baltic Sea. Accred Qual Assur 13:101鈥?07CrossRef
  10.Botta F, Lepot B, Leoz-Garziandia E, Morin A (2012) Estimation of sampling uncertainty in lake-water monitoring in a collaborative field trial. Trends Anal Chem 36:176鈥?84CrossRef
  11.Hanke G, Polesello S, Mariani G, Comero S, Wollgast J, Loos R, Castro-Jimenez J, Patrolecco L, Valsecchi S, Rusconi M, Ademollo N, Bidoglio G (2012) Chemical-monitoring on-site exercises to harmonize analytical methods for priority substances in the European Union. Trends Anal Chem 36:25鈥?5CrossRef
  12.N盲ykki T, Leivuori M, Bj枚rkl枚f K, V盲is盲nen R, Laine M, V盲is盲nen T, Leito I (2014) Proficiency test of pH, conductivity and dissolved oxygen concentration field measurements in river water. Accred Qualy Assur 19:259鈥?68CrossRef
  13.Cotman M, Pintar A (2013) Sampling uncertainty of wastewater monitoring estimated in collaborative field trial. Trends Anal Chem 51:71鈥?8CrossRef
  14.Strub MP, Lepot B, Morin A (2009) Metrological aspects of collaborative field trials, including coping with unexpected events. Trends Anal Chem 28:245鈥?61CrossRef
  15.Drolc A, Cotman M, Ro拧 M (2003) Uncertainty of chemical oxygen demand determination in wastewater samples. Accred Qual Assur 8:138鈥?45CrossRef
  16.Drolc A, Cotman M, Ro拧 M, Majcen N (2006) Measurement traceability and its role in proficiency testing schemes鈥攁 case study for wastewater analysis in Slovenia. Accred Qual Assur 11:455鈥?61CrossRef
  17.Albano FM, Caten CS (2014) Proficiency tests for laboratories: a systematic review. Accred Qual Assur 19:245鈥?57CrossRef
  18.Lyn JA, Ramsey MH, Damant AP, Wood R (2007) Empirical versus modelling approaches to the estimation of measurement uncertainty caused by primary sampling. Analyst 132:1231鈥?237CrossRef
  19.Ramsey MH, Geelhoed B, Wood R, Damant AP (2011) Improved evaluation of measurement uncertainty for sampling by inclusion of between-sampler bias using sampling proficiency testing. Analyst 136:1313鈥?321CrossRef
  20.ISO 6060 (1989) Water quality鈥攄etermination of chemical oxygen demand. International Organization for Standardization, Geneva
  
• 作者单位：Magda Cotman (1)
  Albin Pintar (1)
  
  1. Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, 1001, Ljubljana, Slovenia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Food Science
  Biochemistry
  Commercial Law
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  Marketing
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0517

文摘

The proficiency testing of wastewater sampling is organized by the Laboratory for Environmental Sciences and Engineering at the National Institute of Chemistry, Slovenia (NIC). Preliminary tests started in 2010 at two candidate sites to choose for a trial the most convenient one. In 2012, we organized the first collaborative field trial on wastewater sampling and such trials continued in 2013 and 2014. Between 16 and 20 sampling teams were selected from those that (1) participate in the national wastewater monitoring program and (2) perform analytical activities in laboratories. The participants used a 6-h time proportional sampling approach. They used sampling equipment with different principles of sample collection which take a series of discrete samples at fixed time intervals. Subsequent analyses involved both field and laboratory measurements. The participants, with only one exception, exhibited required technical skills for measuring field parameters (temperature and pH value). All samples taken were also analyzed at NIC. The variability between reported values of participants in the trials, expressed as CV, was found to be 8.5 %, 11.1 % and 9.5 % for chemical oxygen demand. Of all parameters, the largest variability was found for total organic carbon concentration amounting to 23.7 % and 35.7 %. Particular attention was given to separate the measurement uncertainty contributions arising from sampling and chemical analyses. Keywords Monitoring parameters Proficiency testing Sampling uncertainty Scoring results Wastewater sampling