Certified reference materials - beech leaves and spruce needles - for the quality control in monitoring damage in forests by acid deposition
1989
Maier, E.A. (Commission of the European Communities, Brussels (Belgium). Community Bureau of Reference) | Muntau, H. | Griepink, B.
The chemical determination of various elements in leaves or needles allows to establish the damage caused by acid deposition. To control the quality of such determinations the Community Bureau of Reference (BCR) produced two Certified Reference Materials: Beech leaves (CRM No. 100) and Spruce needles (CRM No. 101). After a careful preparation procedure, a homogeneity study and long term stability study, the materials were certified for: Cl, N, P and S in CRM No. 100, Al, Ca, Cl, Mg, Mn, N, P, S and Zn in CRM No. 101. Indicative values on the content of 19 majos and trace elements are also reported
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