Browsing NIVA Open Access Archive by Author "Hovind, H. - Project manager"
Now showing items 1-20 of 89
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Analytical Chemistry intercomparison between University of La Laguna (ULL), University of Las Palmas (ULP), and Norwegian Institute for Water Research (NIVA)
Hovind, H. (NIVA-rapport;3830, Research report, 1998)As a part of the evaluation of chemical procedures applied in the baseline survey at two power plant locations at the Canary Islands, an intercomparison was organized between the University of La Lugana (ULL), the University ... -
Bestemmelse av organisk stoff i avløpsvann
Hovind, H. (NIVA-rapport;2386, Research report, 1990)Det er foretatt en vurdering av hvilken informasjon man får ved bestemmelse av kjemisk og biokjemisk oksygenforbruk samt totalt organisk karbon. Resultatene for disse tre analysevariablene er sammenlignet for ufiltrert og ... -
Bestemmelse av organisk stoff ved drifts- og utslippskontroll
Hovind, H. (NIVA-rapport;2544, Research report, 1991)Det er foretatt en sammenligning av ulike parametre for bestemmelse av organisk stoff i kommunalt avløpsvann. Som rutineparametre ved utslippskontrollen anbefales løst organisk karbon (DOC) og suspendert tørrstoff (STS). ... -
Håndbok for beregning av måleusikkerhet ved miljølaboratorier
Magnusson, B.; Näykki, T.; Hovind, H.; Krysell, M. (NIVA-rapport;5576, Research report, 2008) -
Håndbok for kjemiske laboratorier
Hovind, H. (NIVA-rapport;5322, Research report, 2006) -
Intercalibration 8802 (ICP Waters report)
Hovind, H. (NIVA-rapport;2153, Research report, 1988-08)Ten laboratories in nine countries participated in the second intercalibration, 8802. Based on the general target accuracies of 20%, all the results were acceptable for conductivity, nitrate, sulfate and sodium. For chloride, ... -
Intercalibration 9004. pH and alkalinity (ICP Waters report)
Hovind, H. (NIVA-rapport;2465, Research report, 1990-08)Eleven laboratories in ten countries participated in intercalibration 9004, especially designed for testing of pH and alkalinity determination. The estimate of a total error of +/- 0.2 pH units seems to be a reasonable ... -
Intercalibration 9105. pH, conductivity, alkalinity, nitrat + nitrite, chloride, sulfate, calcium, magnesium, sodium, potassium and total organic carbon (ICP Waters report)
Hovind, H. (NIVA-rapport;2591, Research report, 1991-07)21 laboratories in 15 countries participated in intercalibration 9105. Basedon the general target accuracy of +/- 20 %, 90 - 100 % of the results were acceptable for all the main components, only 0-2 result pairs lying ... -
Intercalibration 9206. pH, conductivity, alkalinity, nitrat + nitrite, chloride, sulfate, calium, magnesium, sodium, potassium, aluminium and dissolved organic carbon (ICP Waters report)
Hovind, H. - Project manager (NIVA-rapport;2784, Research report, 1992-10)23 laboratories in 18 countries participated in intercalibration 9206. Based on the general target accuracy of ± 20 %, about 80 - 90 % of the results were acceptable for the main components. However, for pH only 30 and 70 ... -
Intercalibration 9307. pH, conductivity, alkalinity, nitrate + nitrite, chloride, sulfatw, calcium, magnesium, sodium, potassium, total aluminium, reactive and non-labile aluminium, dissolved organic carbon, and chemical oxygen demand (ICP Waters report)
Hovind, H. - Project manager (NIVA-rapport;2948, Research report, 1993-09)26 laboratories in 19 countries participated in intercalibration 9307. Based on the general target accuracy of +29%, 81% of the results were accceptable. However, for pH only 52% of the result pairs were acceeptable in ... -
Intercalibrition 8903. Dissolved organic carbon, and aluminium fractions (ICP Waters report)
Hovind, H. (NIVA-rapport;2238, Research report, 1989-04)Ten laboratories in ten countries participated in the third intercalibration, 8903. Based on the general target accuracies of +/- 20%, all the results were acceptable for dissolved organic carbon. Acceptable results for ... -
Intercomparison 0014: pH, Cond, HCO3, NO3+ NO2, Cl, SO4,Ca, Mg, Na, K, total-aluminium, aluminium - reactive and nonlabile, DOC, COD-Mn, Fe, Mn, Cd, Pb, Cu, Ni and Zn (ICP Waters report 55/2000)
Hovind, H. (NIVA-rapport;4281, Research report, 2000-09)71 laboratories received samples for the intercomparison 0014, and 65 laboratories in 26 countries submitted results. Three sample sets were used, one for the determination of major ions, one for organic matter and aluminium ... -
Intercomparison 0115: pH, K25, HCO3, NO3+ NO2, Cl, SO4,Ca, Mg, Na, K, total aluminium, aluminium - reactive and nonlabile, TOC, COD-Mn, Fe, Mn, Cd, Pb, Cu, Ni and Zn (ICP Waters report 64/2001)
Hovind, H. (NIVA-rapport;4416, Research report, 2001-08)77 laboratories received samples for the intercomparison 0115, and 72 laboratories in 26 countries submitted results. Three sample sets were used, one for the determination of major ions, one for organic matter and aluminium ... -
Intercomparison 0216: pH, K25, HCO3, NO3+ NO2, Cl, SO4, Ca, Mg, Na, K, Fe, Mn, Cd, Pb, Cu,Ni and Zn (ICP Waters report 68/2002)
Hovind, H. (NIVA-rapport;4558, Research report, 2002-08)79 laboratories received samples for the intercomparison 0216, and 75 laboratories in 27 countries submitted results. Two sample sets were used, one for the determination of major ions, and one for heavy metals. Based on ... -
Intercomparison 0317: pH, Cond, HCO3, NO3+NO2 C1, SO4, Ca, Mg, Na, K, Fe, Mn, Cd, Pb, Cu, Ni and Zn (ICP Waters report 74/2003)
Hovind, H. (NIVA-rapport;4715, Research report, 2003-11)75 laboratories received samples for the intercomparison 0317, and 69 laboratories in 27 countries submitted results. Two sample sets were used, one for the determination of major ions, and one for heavy metals. Based on ... -
Intercomparison 0418: pH, Cond, HCO3 NO3+NO2, C1, SO4, Ca, Mg, Na, K, Fe, Mn, Cd, Pb, Cu, Ni, and Zn (ICP Waters report 78/2004)
Hovind, H. (NIVA-rapport;4875, Research report, 2004-11)68 laboratories received samples for the intercomparison 0418, and 63 laboratories in 27 countries submitted results. Two sample sets were used, one for the determination of major ions, and one for heavy metals. Based on ... -
Intercomparison 0923: pH, Cond, HCO3, NO3-N, Cl, SO4, Ca, Mg, Na, K, TOC, Al, Fe, Mn, Cd, Pb, Cu, Ni, and Zn (ICP Waters report 98/2009)
Hovind, H. (NIVA-rapport;5845, Research report, 2009-10)72 laboratories received samples for the intercomparison 0923, and 68 laboratories in 29 countries submitted results. Two sample sets were used, one for the determination of major ions, and one for heavy metals. Based on ... -
Intercomparison 1024: pH, Cond, HCO3, NO3-N, CI, SO4, Ca, Mg, Na, K, TOC, A1, Fe, Mn, Cd, Pb, Cu, Ni, and Zn (ICP Waters report 102/2010)
Hovind, H. (NIVA-rapport;6029, Research report, 2010-09)75 laboratories received samples for the intercomparison 1024, and 65 laboratories in 25 countries submitted results. Two sample sets were used, one for the determination of major ions, and one for heavy metals. Based on ... -
Intercomparison 9408. pH, conductivity, alkalinity, nitrate + nitrite, chloride, sulfate, calcium, magnesium, sodium, potassium, total aluminium, dissolved organic carbon, and chemical oxygen demand (ICP Waters report)
Hovind, H. (NIVA-rapport;3142, Research report, 1994-10)26 laboratories in 17 countries participated in intercomparison 9408. Based on the general target accuracy of +-20%, 81% of the results were acceptable. However, for pH only 54% and 59% of the result pairs in the two sample ... -
Intercomparison 9509. pH, conductivity, alkalinity, nitrate +/- nitrite, chloride, sulfate, calcium, magnesium, sodium, potassium, total aluminium, reactive and non-labile aluminium, dissolved organic carbon, and chemical oxygen demand (ICP Waters report)
Hovind, H. (NIVA-rapport;3331, Research report, 1995-10)46 laboratories in 21 countries participated in intercomparison 9509. Two sample sets, one for the major ions and one for organic matter and aluminium fractions, were used. Based on the general target accuracy of + 20 %, ...