Photography — Photographic-grade chemicals — Test methods — Part 5: Determination of heavy metals and iron content
NORM herausgegeben am 30.12.1992
Bezeichnung normen: ISO 10349-5:1992
Ausgabedatum normen: 30.12.1992
Zahl der Seiten: 3
Gewicht ca.: 9 g (0.02 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / 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.