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The intercomparison discussed in this report is the sixth exercise connecting laboratories participating in different projects. It makes it possible to examine the main criteria which should be adapted in achieving and maintaining an acceptable analytical quality control. Artificial rainwater samples and sodium hydrogen carbonate stabilized with chloroform were prepared in September 1994 by the Environment Institute of the Joint Research Centre of Ispra and the results elaborated jointly with the CNR Istituto Italiano di Idrobiologia, Pallanza. Homogeneity and stability tests were performed to check the reliability of the samples. BCR certified reference materials, together with the best analytical methods available, were used to assess the expected concentrations. Results showed the prevalence of systematic over random errors for most of the chemical variables examined. A comparison of the exercises performed in 1991-94 shows a general improvement in the results.

Additional information

Authors: MOSELLO R ET AL, Istituto Italiano di Idrobiologia, Verbania Pallanza (IT);BIANCHI M ET AL, JRC Ispra (IT)
Bibliographic Reference: EUR 16332 EN (1995) 48pp., FS, free of charge
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT)
Record Number: 199512190 / Last updated on: 1996-01-26
Original language: en
Available languages: en