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download between 0-24 hoursReleased: 1992
ISO 10349-3:1992
ISO 10349-3:1992-Photography — Photographic-grade chemicals — Test methods-Part 3: Determination of matter insoluble in ammonium hydroxide solution
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Standard´s number: | ISO 10349-3:1992 |
Pages: | 2 |
Edition: | 1 |
Released: | 1992 |
Language: | English |
DESCRIPTION
ISO 10349-3:1992
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.