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Norm

ÖNORM EN ISO 15512

Issue date: 2019 11 01

Plastics - Determination of water content (ISO 15512:2019)

This document 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 f...
Valid
Publisher:
Austrian Standards International
Format:
Digital | 45 Pages
Language:
German | English | Download GER/ENG
Optionally co-design standards:
This document 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 %. Method D is suitable for the determination of water content as low as 0,01 % with an accuracy of 0,01 %. Method E is suitable for the determination of water content as low as 0,001 % with an accuracy of 0,001 %. The stated accuracies are detection limits which depend also on the maximal possible sample mass. The water content is expressed as a percentage mass fraction of water. Method D is suitable for polyamide (PA), polycarbonate (PC), polypropylene (PP), polyethylene (PE), epoxy resin, polyethylene terephthalate (PET), polyester, polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), polylactide (PLA), polyamidimid (PAI), it is especially not recommended for samples which can release NH3. Methods A, B, C and E are generally suitable for all types of plastic and moisture level. Water content is an important parameter for processing materials and is expected to remain below the level specified in the appropriate material standard. Six alternative methods are specified in this document: — Method A is an extraction method using anhydrous methanol followed by a Karl Fischer titration of the extracted water. — Method B1 is a vaporization method using a tube oven. — Method B2 is a vaporization method using a heated sample vial. — Method C is a manometric method. — Method D is a thermocoulometric method using a diphosphorus pentoxide (P2O5) cell for the detection of the vaporized water. — Method E is a calcium hydride based method.
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Expand
Norm
ISO 15512:2019
Issue date : 2019 04 30
Plastics — Determination of water content
Norm
ISO 760:1978
Issue date : 1978 12 01
Determination of water — Karl Fischer method (General method)