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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)
(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 %, ... -
Intercomparison 9610, 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)
(NIVA-rapport;3550, Research report, 1996-10)36 laboratories in 21 countries participated in intercomparison 9610. 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%, ... -
Intercomparison 9711. 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)
(NIVA-rapport;3716, Research report, 1997-11)47 laboratories in 22 countries participated in intercomparison 9711. One sample set for the determination of major ions, organic matter and aluminium fractions, were used. Based on the general target accuracy of + 20%, ... -
Intercomparison 9812. 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 49/1998)
(NIVA-rapport;3939, Research report, 1998-10)43 laboratories in 20 countries participated in intercomparison 9812. One sample set for the determination of major ions, organic matter and aluminium fractions, were used. Based on the general target accuracy of * 20 %, ... -
Intercomparison 9913 of the International Cooperative Programme on Assessment and Monitoring of Acidification of Rivers and Lakes (ICP Waters report 51/1999)
(NIVA-rapport;4093, Research report, 1999-09)57 laboratories in 24 countries participated in intercomparison 9913. Two sample sets were used, one for the determination of major ions and one for organic matter and aluminium fractions. Based on the general target ... -
Interim report: Quantification of microplastic and plastic additives in water and fish in RAS (WP1)
(NIVA-rapport;7961-2024, Report, 2024)Plastic material has been collected from three recirculating aquaculture systems (RAS) and their infrastructure. All plastic sources were analysed to identify their polymer and additive contents and a reference library ... -
INTERKOMMUNALT RENSEANLEGG I HAMAR FORSØK I HALVTEKNISK MÅLESTOKK. Delrapport nr. 2: Forsøk i biologisk-kjemisk rensing
(NIVA-rapport;0611, Research report, 1974)FORSØK I HALVTEKNISK MÅLESTOKK MED BIOLOGISK-KJEMISK RENSING AV KOMMUNALT AVLØPSVANN. ALUMINIUMSULFAT, KALK OG JERN(2)-SULFAT + KALK BENYTTET SOM FELLINGSMIDDEL. RESULTATER FRA FORSØKENE MED VURDERING -
INTERKOMMUNALT RENSEANLEGG I HAMAR. FORSØK I HALVTEKNISK MÅLESTOKK. DELRAPPORT NR.1: FORSØK MED MEKANISK-KJEMISK RENSING
(NIVA-rapport;0572, Research report, 1974)UTFØRT FORSØK I HALVTEKNISK MÅLESTOKK MED MEKANISK-KJEMISK RENSING AV KOMMUNALT AVLØPSVANN FRA SEPTEMBER TIL DESEMBER 1973. FØLGENDE FELLINGSKJEMIKALIER ER PRØVET: ALUMINIUMSULFAT, KALK, JERN3KLORID OG KALK, JERN2SULFAT ... -
An interlaboratory comparison exercise for the determination of microplastics in standard sample bottles
(Peer reviewed; Journal article, 2019)An interlaboratory comparison exercise was conducted to assess the consistency of microplastic quantification across several laboratories. The test samples were prepared by mixing one liter seawater free of plastics, ... -
Interlaboratory Comparison of Extractable Organofluorine Measurements in Groundwater and Eel (Anguilla rostrata): Recommendations for Methods Standardization
(Peer reviewed; Journal article, 2023)Research on per- and polyfluoroalkyl substances (PFAS) frequently incorporates organofluorine measurements, particularly because they could support a class-based approach to regulation. However, standardized methods for ... -
Interlaboratory Validation of Toxicity Testing Using the Duckweed Lemna minor Root-Regrowth Test
(Peer reviewed; Journal article, 2022)The common duckweed (Lemna minor), a freshwater monocot that floats on the surfaces of slow-moving streams and ponds, is commonly used in toxicity testing. The novel Lemna root- regrowth test is a toxicity test performed ... -
Intern kvalitetskontroll. Håndbok for vannanalyselaboratorier
(NIVA-rapport;1897, Research report, 1992)Med støtte fra Nordisk Ministerråd har en felles nordisk arbeidsgruppe utarbeidet en danskspråklig "Håndbog i intern kvalitetskontrol på vandlaboratorier". Arbeidsgruppen har bestått av: Vibeke B. Jensen, VKI, Danmark; ... -
International Intercomparison of In Situ Chlorophyll-a Measurements for Data Quality Assurance of the Swedish Monitoring Program
(Peer reviewed; Journal article, 2022)Chlorophyll-a is an essential climate variable. Chlorophyll-a in situ measurements are usually used for the validation of satellite images. Previous intercomparisons have shown that there can be substantial differences ... -
The interplay between terrestrial organic matter and benthic macrofauna: Framework, synthesis, and perspectives
(Peer reviewed; Journal article, 2023)Ecosystems are shaped by physical, chemical, and biological drivers, which affect the quality and quantity of basal energy sources, with impacts that cascade to higher trophic levels. In coastal, shelf, and marine habitats, ... -
Interpretation of SoilData from the Rain Project
(NIVA-rapport;2294, Research report, 1989)Process-oriented models for prediction of soil and water acidification at the catchment scale require soil chemical and physical data as input parameters. Choice of soil properties characteristic for an entire catchment ... -
Intertidal regions changing coastal alkalinity: The Wadden Sea-North Sea tidally coupled bioreactor
(Journal article; Peer reviewed, 2019)In this study, we successfully implemented a total alkalinity (TA) analyzer in a flow‐through setup, in combination with a FerryBox. The high‐frequency (10 min) measurements along our ship's route revealed that in coastal ... -
Introduced European minnow Phoxinus phoxinus in alpine lakes may increase total mercury concentration in brown trout Salmo trutta
(Peer reviewed; Journal article, 2021)In Norway, the cyprinid European minnow Phoxinus phoxinus has been spread far outside its previous natural distribution area, with lots of establishments in mountain lakes where brown trout Salmo trutta originally was the ... -
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake
(Journal article; Peer reviewed, 2018)Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a ... -
Introduction to the Special Issue – Flows and Practices: The Politics of Integrated Water Resources Management (IWRM) in Southern Africa
(Journal article; Peer reviewed, 2016)For the past two decades, IWRM has been actively promoted by water experts as well as multilateral and bilateral donors who have considered it to be a crucial way to address global water management problems. IWRM has been ... -
Invasion impacts and dynamics of a European-wide introduced species
(Peer reviewed; Journal article, 2022)Globalization has led to the introduction of thousands of alien species worldwide. With growing impacts by invasive species, understanding the invasion process remains critical for predicting adverse effects and informing ...