ISO 1264:1980

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Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract

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ISO 1264:1980

Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract

PUBLISH DATE 1980
ISO 1264:1980

Treatment of a test portion of resin with a given volume of an aqueous solution of sodium chloride previously neutralized to pH 7.0.

After stirring and decanting, measurement of the potential difference existing between a glass electrode and a reference calomel electrode immersed in the liquid maintained at 23 °C.

Reading of this difference, expressed in pH units directly on the pH meter scale.

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