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Standard Practice for Determination of Volatiles in Polymers by Static Headspace Gas Chromatography
Automatische name übersetzung:
Standard Praxis zur Bestimmung der flüchtigen Stoffe in Polymere, die durch statische Headspace-Gaschromatographie
NORM herausgegeben am 15.12.2012
Bezeichnung normen: ASTM D4526-12
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 15.12.2012
SKU: NS-27583
Zahl der Seiten: 4
Gewicht ca.: 12 g (0.03 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
gas chromatography, headspace, polymers, volatiles, ICS Number Code 83.080.01 (Plastics in general)
Significance and Use | ||||||||
3.1 For various reasons, one may want to measure the level of unreacted or residual monomer, water, or other volatile components in a polymer sample. 3.2 Volatiles of interest are often at trace concentrations. Headspace analysis is suited for determination of these trace components which often cannot be determined by conventional gas chromatography because of sample decomposition or interferences. 3.3 For polymer analysis, sample treatment for headspace analysis is simpler than conventional gas chromatography, where precipitation steps may be required to prevent polymer contamination of the chromatographic column. 3.4 This headspace practice will be able to determine qualitatively any component with sufficient vapor pressure. It is capable of yielding semiquantitative results and can be used for relative comparisons between samples. |
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1. Scope | ||||||||
1.1 Headspace gas chromatography (GC) involves the determination of volatile components in a polymer solution by gas chromatography of a vapor phase in thermal equilibrium with the sample matrix. Volatiles in finely ground insoluble polymers can also be determined with and without an extracting solvent. 1.2 This practice provides two procedures: 1.2.1 Procedure A—Automatic headspace analysis. 1.2.2 Procedure B—Manual injection headspace analysis. 1.3 This standard does not
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine
the applicability of regulatory limitations prior to use.
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Chromatography Standard Test Method for Residual
Acrylonitrile Monomer Styrene-Acrylonitrile Copolymers and Nitrile
Rubber by Headspace Gas Chromatography (Withdrawn 2010) Standard Practice for Packed Column Gas
Chromatography Standard Practice for Gas Chromatography
Terms and Relationships (Includes all amendments and changes
4/28/2021). |
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