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Standard Test Method for Trace Carbonyl Sulfide in Propylene by Gas Chromatography
Automatische name übersetzung:
Standard Test Method for Trace Carbonylsulfid in Propylen durch Gaschromatographie
NORM herausgegeben am 1.12.2012
Bezeichnung normen: ASTM D5303-92(2012)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.12.2012
SKU: NS-30657
Zahl der Seiten: 6
Gewicht ca.: 18 g (0.04 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
carbonyl sulfide, flame photometric detector, gas chromatography, propylene, ICS Number Code 71.080.10 (Aliphatic hydrocarbons)
Significance and Use | ||||||
4.1 In processes producing propylene, COS usually remains with the C3 hydrocarbons and must be removed, since it affects product quality. COS acts as a poison to commercial polymerization catalysts, resulting in deactivation and costly process downtime. 4.2 Accurate gas chromatographic determination of trace COS in propylene involves unique analytical problems because of the chemical nature of COS and idiosyncracies of trace level analyses. These problems result from the reactive and absorptive nature of COS, the low concentration levels being measured, the type of detector needed, and the interferences from the propylene sample matrix. This test method addresses these analytical problems and ways to properly handle them to assure accurate and precise analyses. 4.3 This test method provides a basis for agreement between two laboratories when the determination of trace COS in propylene is important. The test method permits several calibration techniques. For best agreement between two labs, it is recommended that they use the same calibration technique. |
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1. Scope | ||||||
1.1 This test method covers the determination of traces of carbonyl sulfide (COS) in propylene. It is applicable to COS concentrations from 0.5 to 4.0 mg/kg (parts per million by mass). See Note 1. 1.2 The values stated in SI units
are to be regarded as standard. No other units of measurement are
included in this standard.
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.
Standard Practice for Calibration
Techniques Using Permeation Tubes Standard Test Method for Total Sulfur in
Gaseous Fuels by Hydrogenolysis and Rateometric Colorimetry Standard Practice for Using Flame
Photometric Detectors in Gas Chromatography (Includes all
amendments and changes 5/5/2021). |
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