ISO 10349-3:1992 PDF
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Photography — Photographic-grade chemicals — Test methods — Part 3: Determination of matter insoluble in ammonium hydroxide solution
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.
| Edition | 1992 |
|---|---|
| Standard Part No | 3 |
| Published Date | 1992 |
| Published By | International Standardization Organisation |
| Page Count | 2 |
