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ILNAS-EN ISO 1264:1997 Edition 07/1997
Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract (ISO 1264:1980)
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Abstract

Treatment of a test portion of resin with a given volume of an aqueous solution of sodium chloride previous 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 and reading of this difference, expressed in pH units directly on th pH meter scale.

Status

Standard - Active

Origin

Technical Committee :
CEN/TC 249 : Plastics

Implementation

start of the vote on the project      date of ratification (dor)    13/06/1997
end of the vote on the project      date of anouncement (doa)    31/10/1997
start of the vote on the final project    24/10/1996   date of publication (dop)    31/01/1998
end of the vote on the final project    24/04/1997   date of withdrawal (dow)    31/01/1998


Publication Official Journal
of the Grand-Duchy of Luxembourg
02/12/1997
Reference

International Classification for Standards (ICS codes) :

83.080.20 : Thermoplastic materials

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