| Title | Influence of QA/QC procedures on non-sampling error in deposition monitoring in forests |
| Abstract | A Working Ring Test (WRT) was organised in the framework of the EU Regulation (EC) No 2152/2003 (Forest Focus) and of the UN/ECE Program ICP Forests to evaluate the overall performance of the laboratories monitoring atmospheric deposition and soil solution in European Forests. Seven natural samples of atmospheric deposition and soil solutions and 5 synthetic solutions were distributed to 52 laboratories, which analysed them using their routine methods. Thirteen variables are considered in this paper: pH, conductivity, calcium, magnesium, sodium, potassium, ammonium, sulfate, nitrate, chloride, total alkalinity, total dissolved nitrogen and dissolved organic carbon. For each variable, the relative standard deviation of the results was evaluated, after outlier rejection, to estimate the analytical error of the measurements. The results are evaluated considering the Quality Assurance/Quality Control (QA/QC) procedure included in the ICP Forests monitoring manual: consistency check of the data and use of control charts and internal standards. A Data Quality Objective (DQO) is defined for each of the variables and the number of data meeting the DQOs are discussed in relation to the QA/QC procedures adopted. Although 38% of the results did not meet the DQO, the laboratories adopting QA/QC procedures produced a larger proportion of results meeting the objective and a consistent part of the outliers could be detected a posteriori checking analyses consistence. |
| Source | Journal of environmental monitoring (Print) 11 (4), pp. 745–750 |
| Keywords | WATERS |
| Journal | Journal of environmental monitoring (Print) |
| Editor | Royal Society of Chemistry,, Cambridge, Regno Unito |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1039/b818168n |
| Authors | Marchetto A., Mosello R., Tartari G., Tornimbeni O., Derome J.(1), Derome K.(1), Sorsa P.(1), König N.(2), Clarke N.(3), Ulrich E.(4), Kowalske A.(5) |
| Text | 53077 2009 10.1039/b818168n ISI Web of Science WOS 000265017000006 WATERS Influence of QA/QC procedures on non sampling error in deposition monitoring in forests Marchetto A., Mosello R., Tartari G., Tornimbeni O., Derome J. 1 , Derome K. 1 , Sorsa P. 1 , Konig N. 2 , Clarke N. 3 , Ulrich E. 4 , Kowalske A. 5 1 Finnish Forest Research Institute, Rovaniemi, Finland; 2 Niedersaechsische Forstliche Versuchsanstalt, Goettingen, Germany; 3 Norwegian Forest Research Institute, As, Norway; 4 Office National des Forets, Departement des Recherches, Fontainebleau, France; 5 Forest Research Institute, Warsaw, Poland A Working Ring Test WRT was organised in the framework of the EU Regulation EC No 2152/2003 Forest Focus and of the UN/ECE Program ICP Forests to evaluate the overall performance of the laboratories monitoring atmospheric deposition and soil solution in European Forests. Seven natural samples of atmospheric deposition and soil solutions and 5 synthetic solutions were distributed to 52 laboratories, which analysed them using their routine methods. Thirteen variables are considered in this paper pH, conductivity, calcium, magnesium, sodium, potassium, ammonium, sulfate, nitrate, chloride, total alkalinity, total dissolved nitrogen and dissolved organic carbon. For each variable, the relative standard deviation of the results was evaluated, after outlier rejection, to estimate the analytical error of the measurements. The results are evaluated considering the Quality Assurance/Quality Control QA/QC procedure included in the ICP Forests monitoring manual consistency check of the data and use of control charts and internal standards. A Data Quality Objective DQO is defined for each of the variables and the number of data meeting the DQOs are discussed in relation to the QA/QC procedures adopted. Although 38% of the results did not meet the DQO, the laboratories adopting QA/QC procedures produced a larger proportion of results meeting the objective and a consistent part of the outliers could be detected a posteriori checking analyses consistence. 11 http //pubs.rsc.org/en/journals/journalissues/em DOI 10.1039/b818168n articolo pubblicato 10_JEM_2009_Mosello.pdf Articolo in rivista Royal Society of Chemistry, 1464 0325 Journal of environmental monitoring Print Journal of environmental monitoring Print J. environ. monit. Print Journal of environmental monitoring Print JEM Cambridge. Print Print TORNIMBENI OMBRETTA aldo.marchetto MARCHETTO ALDO rosario.mosello MOSELLO ROSARIO gabriele.tartari TARTARI GABRIELE TA.P02.005.002 Uso della paleolimnologia come strumento per lo studio del paleoclima e dell evoluzione climatica |
