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Standard Practice for Determination of Volatiles in Polymers by Static Headspace Gas Chromatography
Automaticky přeložený název:
Standardní praxe pro stanovení těkavých látek v polymerech statickou Headspace plynovou chromatografií
NORMA vydána dne 15.12.2012
Označení normy: ASTM D4526-12
Poznámka: NEPLATNÁ
Datum vydání normy: 15.12.2012
Kód zboží: NS-27583
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy 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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Terms and Relationships (Includes all amendments and changes
4/28/2021). |
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