Photography — Photographic-grade chemicals — Test methods — Part 5: Determination of heavy metals and iron content
NORMA vydána dne 30.12.1992
Označení normy: ISO 10349-5:1992
Datum vydání normy: 30.12.1992
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy 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.