NORMSERVIS s.r.o.

ISO 10349-3:1992

Photography — Photographic-grade chemicals — Test methods — Part 3: Determination of matter insoluble in ammonium hydroxide solution

NORMA vydána dne 30.12.1992

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Informace o normě:

Označení normy: ISO 10349-3:1992
Datum vydání normy: 30.12.1992
Počet stran: 2
Přibližná hmotnost: 6 g (0.01 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO

Anotace textu normy ISO 10349-3:1992 :

Description / Abstract: The method is based on weighing a test portion, dissolution in water, addition of ammonium oxalate solution, diammonium hydrogen phosphate solution and ammonium hydroxide solution, allowing to stand for at least 8 h, filtering out the precipitate through filter paper, transfer of the filter paper with precipitate to a prepared crucible, burning it over a gas burner, incineration of the residue in a furnace, cooling in a desiccator, and reweighing.