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ISO 10349-3:1992

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

Dec 30, 1992

General information

90.93     Dec 20, 2023

ISO

ISO/TC 42

International Standard

37.040.30  

English  

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 10349-3:1992
90.93 Standard confirmed
Dec 20, 2023