The standard applies to aqueous solutions with a specific conductivity less than 300 mS/m (determined in accordance with NEN 6412) from which particles larger than 0.45 jxm have been removed. The detection limit depends on the device used, in general copper levels of 1 Mg/l can be determined. For copper contents higher than 100 /ug/l, use of the flame technique is recommended, see NEN 6451. Note If the specific conductivity is greater than 300 mS/m, an extraction method must be used (see 10).
NEN 6454-1981 history
1981NEN 6454-1981 Water - Determination of copper content by atomic absorption spectrometry (graphite furnace technique)