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ISO 7766-1:1993

Photography — Processing wastes — Analysis of cyanides — Part 1: Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry

Jan 21, 1993
95.99   Withdrawal of Standard   Jun 19, 2003

General information

95.99     Jun 19, 2003

ISO

ISO/TC 42

International Standard

37.040.30     13.030.30  

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Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 7766-1:1993
95.99 Withdrawal of Standard
Jun 19, 2003

REVISED BY

PUBLISHED
ISO 7766:2003