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Homepage>ISO Standards>ISO 10349-7:1992-Photography — Photographic-grade chemicals — Test methods-Part 7: Determination of alkalinity or acidity
download between 0-24 hoursReleased: 1992
ISO 10349-7:1992-Photography — Photographic-grade chemicals — Test methods-Part 7: Determination of alkalinity or acidity

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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Standard´s number:ISO 10349-7:1992
Pages:2
Edition:1
Released:1992
Language:English
DESCRIPTION

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.
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