dc.contributor.author | Escudero-Oñate, Carlos | |
dc.date.accessioned | 2019-01-04T09:48:22Z | |
dc.date.available | 2019-01-04T09:48:22Z | |
dc.date.created | 2019-01-03T09:08:34Z | |
dc.date.issued | 2018 | |
dc.identifier.isbn | 978-82-577-7051-8 | |
dc.identifier.issn | 1894-7948 | |
dc.identifier.uri | http://hdl.handle.net/11250/2579134 | |
dc.description | Project manager Carlos Escudero-Oñate | nb_NO |
dc.description.abstract | In the current edition, 32 laboratories from 19 countries were included in the 2019 ICP-Waters intercomparison. Similar to earlier intercomparisons, two sample sets were prepared: one for the determination of major ions and one for heavy metals. Based on the general target accuracy of 20%, or the special accuracy limit for pH and conductivity ( 0.2 pH units and 10% respectively), 81% of the overall results were accepted. The best results were for the variables sulphate, calcium, iron, manganese, and zinc. For these variables the acceptance was higher than 90%. Good results were obtained this year also for pH, in contrast to with previous editions. 81% of the participants provided results within the acceptance criteria. The higher accuracy in the pH results in this year was due to the ease of its determination when compared earlier; instead of circumneutral or slightly acidic pH, the sample set AB had been adjusted to acidic pH; about 4.5. The analysis of Total-P has exhibited a remarkable increase in the quality of the results; 33% of the results provided by the participants met the acceptance criteria (in contrast with the 21% obtained in the former edition). Harmonization of the analytical methods used may be the most important way to improve the comparability for these parameters. | nb_NO |
dc.description.sponsorship | Norwegian Environment Agency; United Nations Economic Commission for Europe (UNECE) | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Norwegian Insititute for Water Research | nb_NO |
dc.relation.ispartof | NIVA-rapport | |
dc.relation.ispartofseries | NIVA-rapport;7316 | |
dc.relation.ispartofseries | ICP Waters report;137/2018 | |
dc.rights | Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/deed.no | * |
dc.subject | Sammenligning | nb_NO |
dc.subject | Intercomparison | nb_NO |
dc.subject | Kvalitetskontroll | nb_NO |
dc.subject | Quality Control | nb_NO |
dc.subject | Sur nedbør | nb_NO |
dc.subject | Acid Rain | nb_NO |
dc.subject | Overvåking | nb_NO |
dc.subject | Monitoring | nb_NO |
dc.title | Intercomparison 1832: pH, Conductivity, Alkalinity, NO3-N, Cl, SO4, Ca, Mg, Na, K, TOC, Tot-P, Al, Fe, Mn, Cd, Pb, Cu, Ni, and Zn | nb_NO |
dc.type | Research report | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.rights.holder | Norwegian Insititute for Water Research | nb_NO |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400 | nb_NO |
dc.subject.nsi | VDP::Mathematics and natural scienses: 400 | nb_NO |
dc.source.pagenumber | 72 | nb_NO |
dc.source.issue | 7316 | nb_NO |
dc.identifier.cristin | 1649114 | |
cristin.unitcode | 7464,30,21,0 | |
cristin.unitname | Miljøkjemi | |
cristin.ispublished | true | |
cristin.fulltext | original | |