The principle of the test method specified is treating a sample of effluent, or diluted effluent, with a mixture of iron(II) and iron(III) ions. If Fe(CN)6 is present, a blue suspension will form. In the range of 1,0 mg/l to 10,0 mg/l, this suspension is stable and its absorbance is linear with its concentration. The absorbance is measured with a spectrometer, and the concentration determined from a previously established calibration.
WITHDRAWN
ISO 7766-1:1993
95.99
Withdrawal of Standard
Jun 19, 2003
PUBLISHED
ISO 7766:2003
Photography — Processing wastes — Analysis of cyanides — Part 1: Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry
60.60 Standard published
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