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sklademVydáno: 1992-12-30
ISO 10349-7:1992
ISO 10349-7:1992 - Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity
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| Označení normy: | ISO 10349-7:1992 |
| Vydání: | 1 |
| Vydáno: | 1992-12-30 |
| Počet stran (Anglicky): | 2 |
Popis
ISO 10349-7:1992
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.