Full Description

This International Standard specifies two methods for the determination of chromium in water by atomic absorption spectrometry. The two methods are covered in separate clauses as follows:

Clause 3: Determination of chromium by flame atomic absorption spectrometry;Clause 4: Determination of chromium by electrothermal atomization atomic absorption spectrometry.

Clause 3 is applicable to the analysis of water and waste water when the concentration range is between 0,5 mg/l and 20 mg/l of chromium. When the concentration is below 0,5 mg/l, the determination can be carried out after carefully evaporating an acidified sample to small volume, taking care to avoid the formation of a precipitate.

Clause 4 is applicable to the analysis of water and waste water when the concentration range is between 5 g/l and 100 g/l of chromium by injecting a sample volume of 20 l. It is applicable to the determination of higher concentrations by using a smaller sample volume.

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Published: 07/01/1998 Number of Pages: 10File Size: 1 file , 59 KB