NEN 6432-1993 Water. Determination of arsenic content by atomic absorption spectrometry (hydride generation technique). Destruction with nitric acid and hydrochloric acid
This standard describes a method for determining the arsenic content of water using atomic absorption spectrometry. The standard applies to aqueous solutions from which particles larger than 0.45 [im have been removed. The detection limit depends on the device used; In general, arsenic levels can be determined from 0.6 ug/1. The determination can be disturbed if the following elements are present in the sample above the given concentrations. Sb from 20 ug/1 Sn from 200 ug/1 Fe from 200 mg/l Other elements can also interfere, see the note in Chapter 6. NOTE During the research carried out for the development of the standard, it turned out that it is generally also applicable on surface water from which the sludge suspended in it has not been removed, in which case a total content is determined. However, it must be borne in mind that arsenic, which is incorporated into, for example, a silicate matrix, will not always come into solution with the described method.
NEN 6432-1993 history
1993NEN 6432-1993 Water. Determination of arsenic content by atomic absorption spectrometry (hydride generation technique). Destruction with nitric acid and hydrochloric acid