ISO 7766-1:1993

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

95.99 Withdrawal of Standard Jun 19, 2003

General information

Current stage: 95.99 Effective date: Jun 19, 2003

Originator: ISO

Owner: ISO/TC 42

Type: International Standard

ICS: 37.040.30 13.030.30

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WITHDRAWN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

Preview

Only informative sections of projects are publicly available. To view the full content, you will need to members of the committee. If you are a member, please log in to your account by clicking on the "Log in" button.