Intercalibration 9307. pH, conductivity, alkalinity, nitrate + nitrite, chloride, sulfatw, calcium, magnesium, sodium, potassium, total aluminium, reactive and non-labile aluminium, dissolved organic carbon, and chemical oxygen demand (ICP Waters report)
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- NIVA-rapport 
26 laboratories in 19 countries participated in intercalibration 9307. Based on the general target accuracy of +29%, 81% of the results were accceptable. However, for pH only 52% of the result pairs were acceeptable in relation to the target accuracy of +0.1 units. A total error of +0.2 units seems to be a reasonable assessment of the accuracy between laboratories.
Convention on long-range transboundary air pollution
UtgiverNorsk institutt for vannforskning
ICP Waters report