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  • 1.
    Bell, S.
    et al.
    National Physical Laboratory (NPL), Teddington, UK .
    Aro, Rudolf
    Institute of Chemistry, University of Tartu (UT), Tartu, Estonia .
    Arpino, F.
    University of Cassino and Southern Lazio (UNI CLAM), Cassino, Italy .
    Aytekin, S.
    National Metrology Institute of Turkey (TÜBITAK UME), Gebze-Kocaeli, Turkey.
    Cortellessa, G.
    University of Cassino and Southern Lazio (UNI CLAM), Cassino, Italy.
    Dell'Isola, M.
    University of Cassino and Southern Lazio (UNI CLAM), Cassino, Italy .
    Ferenčíková, Z.
    Czech Metrology institute (CMI), Brno, Czech Republic .
    Fernicola, V.
    Istituto Nazionale di Ricerca Metrologica (INRi M), Torino, Italy .
    Gavioso, R.
    Istituto Nazionale di Ricerca Metrologica (INRi M), Torino, Italy .
    Georgin, E.
    France Centre Technique des Industries Aérauliques et Thermiques (CETIAT), Lyon, France.
    Heinonen, M.
    Centre for Metrology MIKES, VTT Technical Research Centre of Finland Ltd, Espoo, Finland .
    Hudoklin, D.
    Laboratory of Metrology and Quality, Faculty of Elec trical Engineering, University of Ljubljana (UL), Ljubljana, Slovenia .
    Jalukse, L.
    Institute of Chemistry, University of Tartu (UT),Tartu, Estonia .
    Karaböce, N.
    National Metrology Institute of Turkey (TÜBITAK UME), Gebze-Kocaeli, Turkey.
    Leito, I.
    Institute of Chemistry, University of Tartu (UT), Tartu, Estonia .
    Mäkynen, A.
    CEMIS- Oulu, University of Oulu (UOULU), Kajaani, Finland.
    Miao, P.
    National Physical Laboratory (NPL), Teddington, UK .
    Nielsen, J.
    Danish Technological institute (DTI), Aarhus, Denmark .
    Nicolescu, I.
    National Institute of Metrology (INM), Bucharest, Romania.
    Rudolfová, M.
    Czech Metrology institute (CMI), Brno, Czech Republic .
    Ojanen-Saloranta, M.
    Centre for Metrology MIKES, VTT Technical Research Centre of Finland Ltd, Espoo, Finland .
    Österberg, P.
    CEMIS-Oulu, University of Oulu (UOULU), Kajaani, Finland; Measurepolis Development Ltd, Kajaani, Finland .
    Østergaard, P.
    Danish Technological institute (DTI), Aarhus, Denmark .
    Rujan, M.
    National Institute of Metrology (INM), Bucharest, Romania.
    Sega, M.
    Istituto Nazionale di Ricerca Metrologica (INRi M), Torino, Italy .
    Strnad, R.
    Czech Metrology institute (CMI), Brno, Czech Republic .
    Vachova, T.
    Czech Metrology institute (CMI), Brno, Czech Republic .
    METefnet: Developments in metrology for moisture in materials2015Ingår i: 17th International Congress of Metrology, CIM 2015 / [ed] Bernard Larquier, EDP Sciences , 2015, artikel-id 15003Konferensbidrag (Refereegranskat)
    Abstract [fr]

    Bien que les mesures de teneur en eau soient largement utilisées dans l'industrie, les considérations métrologiques quant à cette mesure ne sont pas complètement abouties de sorte à fournir des mesures fiables et traçables au SI. Afin de remédier à ceci, le projet de recherche conjoint, Joint Research Project SIB64 “METefnet – Metrology for moisture in materials”, est actuellement en cours, et contribue au programme européen de recherche en métrologie European Metrology Research Programme. Le projet METefnet a pour objectifs de développer et d'améliorer l'approche métrologique de ce sujet. Ceci inclus notamment: le travail sur de nouvelles méthodes de référence pour évaluer la fraction massique en eau, l'amélioration des mesures mettant en œuvre la méthode primaire de type titration Karl Fischer, le développement de nouveaux matériaux de référence certifiés présentant une très bonne stabilité et permettant une traçabilité au SI, le développement de nouveaux étalons de transfert, la réalisation d'études visant à quantifier et réduire les effets liés à la prise d'échantillon, son transport et sa manipulation, le développement d'une nouvelle méthode pour étalonner les instruments mesurant l'humidité de surface, et l'amélioration des méthodes d'estimation d'incertitudes de ces mesures. Ce travail, réalisé dans le domaine de la métrologie de l'humidité au sein des matériaux, couvre à la fois le mesurande décrit comme étant spécifiquement la teneur en eau, seule, dans les matériaux, mais également un mesurande plus large pouvant inclure l'eau ainsi que d'autres liquides ou composés organiques volatiles; ceci afin de bien mettre en exergue la différence qui peut être observée entre ces deux mesurandes. Le projet global a pour objectif de soutenir une action de dissémination et de traçabilité au système SI des mesures de teneur en eau dans les matériaux avec une exactitude optimale et de développer une infrastructure métrologique cohérente pour ce type de mesures. Le travail technique ainsi que les dernières avancées vous sont ainsi présentées.

  • 2.
    Haiba, E.
    et al.
    Tartu College, Tallinn University of Technology, Tartu, Estonia.
    Nei, L.
    Tartu College, Tallinn University of Technology, Tartu, Estonia.
    Kutti, S.
    Tartu College, Tallinn University of Technology, Tartu, Estonia.
    Lillenberg, M.
    Estonian University of Life Sciences, Tartu, Estonia.
    Herodes, K.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Ivask, M.
    Tartu College, Tallinn University of Technology, Tartu, Estonia.
    Kipper, K.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Aro, Rudolf
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Laaniste, A.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Degradation of diclofenac and triclosan residues in sewage sludge compost2017Ingår i: Agronomy Research, ISSN 1406-894X, Vol. 15, nr 2, s. 395-405Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Land application of sewage sludge compost is an important and efficient tool in the remediation of industrial landscapes and agricultural soils in Estonia. A number of studies have shown that, as a rule, pharmaceuticals and personal care products (PPCPs) are neither completely removed by sewage treatment, nor completely degraded in the environment. In this study, degradation rates of diclofenac sodium (DFC) and triclosan (TCS) were determined during sewage sludge composting. Anaerobically digested and dewatered sewage sludge was mixed with sawdust at two different ratios (1:2 and 1:3 sludge/sawdust, v:v). Then aerobic composting was carried out. These ratios were chosen on the basis of previous studies on sewage sludge composting with different bulking agents. The initial concentration of DFC and TCS was 2 mg kg-1 in relation to dry weight (dw). Low quantities of the studied pharmaceuticals were present in sewage sludge that was used for preparing the compost mixtures used in our experiments. The background concentrations of DFC and TCS were never equal to zero. The results showed that the difference between sewage sludge and bulking agent ratios (1:2 vs 1:3) in compost samples did not significantly affect temperature profiles during the experiment. The degradation of pharmaceuticals was more complete in the compost samples where the ratio of bulking agent was higher (1:3 by volume). The average degradation level (in all compost mixtures) was 95% for DFC and 68% for TCS. Pharmaceuticals entering into the soil may affect microbial activity, plant growth and development, and may have adverse effects on living organisms.

  • 3.
    Takkis, Kalev
    et al.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Aro, Rudolf
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Kõrgvee, Lenne-Triin
    Children’s Clinic, Tartu University Hospital, Tartu, Estonia; Institute of Biomedicine and Translational Medicine, Department of Pharmacology, University of Tartu, Tartu, Estonia.
    Varendi, Heili
    Children’s Clinic, Tartu University Hospital, Tartu, Estonia.
    Lass, Jana
    Pharmacy Department, Tartu University Hospital, Tartu, Estonia; Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Tartu, Estonia.
    Herodes, Koit
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Kipper, Karin
    Institute of Chemistry, University of Tartu, Tartu, Estonia; Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St. George’s, University of London, London, United Kingdom.
    Signal Enhancement in the HPLC-ESI-MS/MS analysis of spironolactone and its metabolites using HFIP and NH4F as eluent additives2017Ingår i: Analytical and Bioanalytical Chemistry, ISSN 1618-2642, E-ISSN 1618-2650, Vol. 409, nr 12, s. 3145-3151Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes an LC-MS/MS method to determine the concentration of spironolactone and its metabolites 7-alpha-methylthiospironolactone and canrenone in blood plasma samples. The resulting assay is simple (using protein precipitation for sample preparation) and sensitive (the lower limit of quantification is close to 0.5 ng/ml) while requiring only 50 mu l of plasma, making it especially suitable for analyzing samples obtained from pediatric and neonatal patients where sample sizes are limited. The sensitivity is achieved by using ammonium fluoride as an eluent additive, which in our case amplifies the signal from our analytes in the plasma solution on average about 70 times. The method is fully validated according to the European Medicines Agency's guideline and used for the measurement of pediatric patients' samples in clinical trials for evaluating oral spironolactone's and its metabolites' pharmacokinetics in children up to 2 years of age.

  • 4.
    Veigure, R.
    et al.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Aro, Rudolf
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Metsvaht, T.
    Tartu University Hospital, Tartu, Estonia.
    Standing, J. F.
    Inflammation, Infection and Rheumatology Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom; Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St. George's, University of London, London, United Kingdom.
    Lutsar, I.
    Institute of Microbiology, University of Tartu, Tartu, Estonia.
    Herodes, K.
    Institute of Chemistry, University of Tartu, Tartu, Estonia.
    Kipper, K.
    Institute of Chemistry, University of Tartu, Tartu, Estonia; Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St. George's, University of London, London, United Kingdom.
    A highly sensitive method for the simultaneous UHPLC?MS/MS analysis of clonidine, morphine, midazolam and their metabolites in blood plasma using HFIP as the eluent additive2017Ingår i: Journal of chromatography. B, ISSN 1570-0232, E-ISSN 1873-376X, Vol. 1052, s. 150-157Artikel i tidskrift (Refereegranskat)
1 - 4 av 4
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