Reference number
ISO 10349-5:1992
ISO 10349-5:1992
© ISO 2025
International Standard
ISO 10349-5:1992
Photography — Photographic-grade chemicals — Test methods — Part 5: Determination of heavy metals and iron content
Edition 1
1992-12
1992-12
ISO 10349-5:1992
21262
Published
(Edition 1, 1992)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method is based on preparation of test samples and heavy metals standard solutions, preconditioning them, addition of sodium sulfide solution (for determination of heavy metals) or 1,10-phenanthroline reagent (for determination of iron), dilution with water, mixing well, transfer to two Nessler colour-comparison cylinders, and comparing the colour of both solutions.