Hivatkozási szám

MSZ EN ISO 15512:2015

Dokumentumazonosító

159353

Cím

Műanyagok. A víztartalom meghatározása (ISO 15512:2014)

Angol cím

Plastics. Determination of water content (ISO 15512:2014)

Alkalmazási terület

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

ICS

83.080.01 Műanyagok általában

Műszaki Bizottság

A szabvány nyelve

angol

Az érvényesség kezdete

2015-01-01

A visszavonás napja

2017-04-01

Forrás

idt ISO 15512:2014; idt EN ISO 15512:2014

Előd

MSZ EN ISO 15512:2009

Utód

MSZ EN ISO 15512:2017

Módosítás

Kiegészítő információk

SZK-közlemények

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A szabvány

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