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  • ISO
    ISO 9174:1998 Water quality - Determination of chromium - Atomic absorption spectrometric methods
    Edition: 1998
    $168.34
    / user per year

Content 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 μg/l and 100 μg/l of chromium by injecting a sample volume of 20 μl. It is applicable to the determination of higher concentrations by using a smaller sample volume.



About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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