This European Standard speciñes two methods for the
determination of chromium in water by atomic
absorption spectrometq The two methods are covered
in separate clauses as follows:
- clause 3 D e t e m o n of chromium by fiame
atomic absorption spectrorne~,
- clause 4: Determirdon of chromium by
electrothermal atomization atomic absorption
spectrome~.
Clause 3 is appiicable to the analysis of water and
waste water when the concentration range is
between 0,5 mg4 and 20 mg/i of chromium. When the
concentration is below 0,5 mg/i, the determination can
be Carried out after carefully evaporating an acidified
sample to smaii volume, takjng care to avoid the
formation of a precipitate.
WAJitNiNG The use of evaporation will increase the
effect of interfering substances and therefore for
concentrations below 0,l mg4 the method in clause 4 is
give&
Clause 4 is applicable to the analysis of water and
waste water when the concentration range is
between 5 pg4 and 100 pg4 of chromium by iqjecting a
sample volume of 20 fi It is appiicable to the
determination of higher concentrations by using a
smaller sample volume.
EN 1233:1996 Referenced Document
EN 25667-2:1993 Water Quality - Sampling - Part 2: Guidance on Sampling Techniques (ISO 5667-2 : 1991)
EN 1233:1996 history
1996EN 1233:1996 Water Quality - Determination of Chromium - Atomic Absorption Spectrometric Methods