Rezultatele obţinute în cadrul proiectului AQUACON la analiza apelor de precipitaţii şi a apelor de suprafaţă de către laboratorul I.C.A.S. Câmpulung Moldovenesc [Results obtained in the framework of the AQUACON Project for precipitation and surface water samples by the I.C.A.S. Câmpulung Moldovenesc laboratory]

Abstract

In order to asses the air pollution effects on forests, the laboratories involved in the ICP Forests Program must use analytical methods that allow to obtain comparable results for the precipitation samples parameters (pH, conductivity, alkalinity, SO 4 2-, NO 3 - , NH 4 + , Cl - Ca2+, Mg2+, Na + , K + ). In the framework of the project “Analytical Quality Control and Assessment in the Mediterranean Basin (AQUACON)”, each year are organized intercomparison exercises using simulated water samples. The chemistry laboratory of the Forest Research Station Campulung Moldovenesc participated to these exercises in 1996, 1997 and 1998. The analytical methods used and the results obtained are presented in this article. It can be concluded that from the total of 110 results ( 10 for each parameter), 8 1 (74 %) registered deviations less than 20% and 29 (26 %) exceed this limit. The most frequent accepted results (deviation less than 20%) were obtained for pH, Na + , conductivity and Mg2+, SO 4 2-, NO 3 - . The lower precisions were obtained for Cl - K + and Ca2+. For K + and Ca2+ we didn’t use the methods recommanded by the Manual ICP Forests and for Cl - we used an alternative method. In order to verify the precision of our methods and results, our laboratory will continue to participate to intercomparison exercises organised by laboratories certificated at European and international level.