ISO 10349-7:1992
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Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity
| Published By | Publication Date | Number of Pages |
| ISO | 1992-12 | 8 |
The method is based on weighing the test portion, dissolution in carbon-dioxide-free water, adding phenolphthalein indicator, and observing the colour of the test solution: if the test solution turns pink, determination of the alkalinity, if it remains colourless, determination of the acidity.
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