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BS EN ISO 15512:2016

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

Plastics. Determination of water content

Available format(s)

Hardcopy , PDF

Superseded date

21-06-2022

Superseded by

BS EN ISO 15512:2019

Language(s)

English

Published date

30-11-2016

€254.76
Excluding VAT

Foreword
Introduction
1 Scope
2 Normative references
3 Method A - Extraction with anhydrous methanol
4 Method B1 - Water vaporization using a heating tube oven
5 Method B2 - Water vaporization using a heated sample vial
6 Method C - Manometric method
7 Test report
Annex A (informative) - Alternative sample preparation
        methods and titration methods
Annex B (informative) - Selection of the optimum
        heating temperature for the water
        content determination
Annex C (normative) - Determination of the water
        content of a water standard
Bibliography

Describes methods for the determination of the water content of plastics in the form of powder, granules, and finished articles.

Committee
PRI/21
DevelopmentNote
Renumbers and supersedes BS ISO 15512. Supersedes 96/125222 DC and BS EN ISO 960. (01/2004) Supersedes 07/30144836 DC. (07/2009) Supersedes 13/30266500 DC. (10/2014)
DocumentType
Standard
Pages
36
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

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 ISO62 . 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 4mm×4mm×3mm. 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 4mm×4mm×3mm. 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 4mm×4mm×3mm. 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.

ISO 1628-1:2009 Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 1: General principles
ISO 1628-5:1998 Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 5: Thermoplastic polyester (TP) homopolymers and copolymers
ISO 1628-6:1990 Plastics — Determination of viscosity number and limiting viscosity number — Part 6: Methyl methacrylate polymers
ISO 1628-3:2010 Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 3: Polyethylenes and polypropylenes
ISO 307:2007 Plastics Polyamides Determination of viscosity number
ISO 62:2008 Plastics Determination of water absorption
ISO 1628-2:1998 Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 2: Poly(vinyl chloride) resins
ISO 1628-4:1999 Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 4: Polycarbonate (PC) moulding and extrusion materials
ISO 760:1978 Determination of water Karl Fischer method (General method)

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