BS EN ISO 15512:2016 - Plastics. Determination of water content

BS EN ISO 15512:2016

Plastics. Determination of water content

Status : Superseded, Withdrawn   Published : November 2016 Replaced By : BS EN ISO 15512:2019

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1.1 This International Standard specifies methods for the determination of the water content of plastics in the form of powder, granules, and finished articles. These methods do not test for water absorption (kinetics and equilibrium) of plastics as measured by ISO 62.

Method A is suitable for the determination of water content as low as 0,1 % with an accuracy of 0,1 %. Method B and Method C are suitable for the determination of water content as low as 0,01 % with an accuracy of 0,01 %.

Water content is an important parameter for processing materials and has to remain below the level specified in the appropriate material standard.

1.2 Four alternative methods are specified in this International Standard.

  • Method A is an extraction method using anhydrous methanol followed by a Karl Fischer titration of the extracted water. It can be used for all plastics and is applicable to granules smaller than 4 mm × 4 mm × 3 mm. The method can also be used for, e.g. prepolymer materials in the form of a powder that are insoluble in methanol.

  • Method B1 is a vaporization method using a tube oven. The water contained in the test portion is vaporized and carried to the titration cell by a dry air or nitrogen carrier gas, followed by a Karl Fischer titration of the collected water. It can be used for all plastics and is applicable to granules smaller than 4 mm × 4 mm × 3 mm.

  • Method B2 is a vaporization method using a heated sample vial. The water contained in the test portion is vaporized and carried to the titration cell by a dry air or nitrogen carrier gas, followed by a Karl Fischer titration of the collected water. It can be used for all plastics and is applicable to granules smaller than 4 mm × 4 mm × 3 mm.

  • Method C is a manometric method. The water content is determined from the increase in pressure, which results when the water is evaporated under a vacuum. This method is not applicable to plastic samples containing volatile compounds, other than water, in amounts contributing significantly to the vapour pressure at room temperature. Checks for the presence of large amounts of volatile compounds are to be carried out periodically, for example by gas chromatography. Such checks are particularly required for new types or grades of material.




Standard NumberBS EN ISO 15512:2016
TitlePlastics. Determination of water content
StatusSuperseded, Withdrawn
Publication Date30 November 2016
Withdrawn Date12 June 2019
Normative References(Required to achieve compliance to this standard)ISO 760
Informative References(Provided for Information)ISO 1628-4, ISO 62, ISO 307, ISO 1628-1, ISO 1628-6, ISO 1628-5, ISO 1628-3, ISO 1628-2
Replaced ByBS EN ISO 15512:2019
ReplacesBS EN ISO 15512:2014
International RelationshipsEN ISO 15512:2016,ISO 15512:2016
Draft Superseded By18/30333271 DC
DescriptorsTesting conditions, Water content determination, Vapour pressure, Chemical analysis and testing, Karl Fischer method, Extraction methods of analysis, Particulate materials, Plastics, Evaporation, Vaporization, Calibration, Weight (mass), Determination of content, Test equipment
ICS83.080.01
Title in FrenchPlastiques. Dosage de l'eau
Title in GermanKunststoffe. Bestimmung des Wassergehaltes
CommitteePRI/21
ISBN978 0 580 92336 4
PublisherBSI
FormatA4
DeliveryYes
Pages36
File Size683 KB
Price£214.00


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