ISO 7766-1:1993 PDF
Photography — Processing wastes — Analysis of cyanides — Part 1: Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry
Title (English):
ISO 7766-1:1993
Photography — Processing wastes — Analysis of cyanides — Part 1: Determination of hexacyanoferrate(II) and hexacyanoferrate(III) by spectrometry
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 5
- Publication date:
- January 21, 1993
- Edition:
- ISO IS 7766 edition 1 version 1
- ICS:
- 13.030.30
Description (English):
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.
Technical details
- Technical committee
- ISO/TC 42 - Photography
- SKU
- ISO 7766-1:1993
