Preparation of candidate reference material major elements in groundwater

Informazioni relative al progetto

ID dell’accordo di sovvenzione: MAT1930012

Progetto chiuso

Data di avvio 1 Gennaio 1994

Data di completamento 31 Luglio 1997

Finanziato da

• Specific research and technological development programme (EEC) in the field of measurements and testing, 1990-1994

Costo totale

Nessun dato

Contributo UE

Nessun dato

Coordinato da

Empresa Portuguesa das Aguas Livres SA
Portugal

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Risultati sfruttabili

Preparation of Candidate Reference Material : "Major Elements in Groundwater"

General Information : The project aims at the preparation of artificial groundwater candidate reference materials corresponding to two levels of concentration of major elements (high and low) of typical and sandstone media. The major elements, compounds and parameters proposed to be certified in the candidate reference materials correspond to those most commonly determined by EC laboratories for the control of EC Directives on groundwater: Na, K, Ca, Mg, C1, SO4, NO3, pH, Fe, Mn, NH4 and PO4, at concentrations representative of those most often encountered in EC groundwaters, and in the range of values given by the EC Directives. The project covers the following tasks: - feasibility study for the preparation of the candidate reference materials (effects of irradiation); - preparation of the candidate reference materials involving g-irradiation and ampouling; - homogeneity and stability studies; - organization of the certification campaign of Na, K, Ca, Mg, C1, SO4, NO3, pH, Fe, Mn, NH4 and PO4 contents; - technical and statistical evaluation of the data and writing of the certification report. The feasibility study was concluded in 1995 and enabled to Optimize the composition of the candidate CRMs and the stabilization procedure. The materials were successfully analyzed in 1997 and subsequently certified. Both CRMs (616 and 617) are now available at the IRMM.