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  • Certified reference materials (CRM 408 and 409) for quality control of main components (ammonium, calcium, hydronium, magnesium, nitrate, potassium, sodium and sulphate) in simulated rain water


Analyses of rainwater are routinely performed by a number of organisations to monitor the contribution from rainwater to the component occurrences in the environment and the acidification of the environment. To control the quality of such determinations, the Community Bureau of Reference (BCR) has organised a certification campaign to produce two simulated rainwater reference materials (CRM 408, low mineral content and CRM 409, high mineral content). The materials were certified for their contents of ammonium (106 micro-mol/kg) (CRM 409), calcium (7.68 and 15.5 micro-mol/kg), chloride (67.3 and 113 micro-mol/kg), hydronium (16.6 and 48.0 micro-mol/kg), magnesium (6.14 and 12.3 micro-mol/kg), nitrate (20.1 and 78.1 micro-mol/kg), potassium (4.25 micro-mol/kg) (CRM 409), sodium (42.0 and 82.9 micro-mol/kg) and sulphate (10.5 and 53.2 micro-mol/kg). Indicative values (not certified) are given for ammonium and potassium in CRM 408. This paper presents the certification work performed, as well as the analytical work for the certification of the contents of relevant species.

Additional information

Authors: REIJNDERS H F R, RIVM National Institute for Public Health and Environmental Protection, Bilthoven (NL);QUEVAUVILLER P, European Commission, Bruxelles (BE);VAN RENTERGHEM D, European Commission, Bruxelles (BE);GRIEPINK B, European Commission, Bruxelles (BE);VAN DER JAGT H, KIWA NV, Research and Consultancy, Nieuwegein (NL)
Bibliographic Reference: Article: Fresenius' Journal of Analytical Chemistry, Vol. 348 (1994) pp. 439-444
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