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Abstract

Analyses of major compounds in freshwater are routinely performed in many European laboratories for the control of water quality. The need for the improvement of the quality of determinations has led the Community Bureau of Reference (BCR) to produce two certified reference materials of freshwater with low mineral (CRM 398) and high mineral (CRM 399) contents. These samples, acidified by nitric acid 0.1 mol/l and kept in polypropylene containers were shown to be stable; no losses were observed providing that each bottle was kept in a sealed, well fitting, tin-plated steel can. No inhomogeneity could be detected. The two CRMs were prepared by spiking tap water with pure salts, i.e. phosphates, sulphates and chloride were added as ammonium salts, nitrates were chosen for magnesium, potassium, sodium, iron and aluminium while manganese was spiked from the dissolved metal. The analyses for the certification of these samples were performed by 13 laboratories using different techniques (e.g. ETAAS, FAAS, ICP-AES and MS, INAA, RNAA). Results for elements such as Ca, Cl, Fe, Na, Mg and Mn have shown good agreement whereas Al, K, P and S apparently were more difficult to determine. The materials will be available at the BCR by the beginning of 1991.

Additional information

Authors: QUEVAUVILLER P, CEC Bruxelles (BE);MAIER E A, CEC Bruxelles (BE);GRIEPINK B, CEC Bruxelles (BE)
Bibliographic Reference: Paper presented: EUROANALYSIS VII, Vienna (AT), August 26-31, 1990
Availability: Text not available
Record Number: 199011027 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en
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