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  • ASTM
    D5303-92(2012) Standard Test Method for Trace Carbonyl Sulfide in Propylene by Gas Chromatography
    Edition: 2012
    $103.58
    Unlimited Users per year

Description of ASTM-D5303 2012

ASTM D5303 - 92(2012)

Standard Test Method for Trace Carbonyl Sulfide in Propylene by Gas Chromatography

Active Standard ASTM D5303 | Developed by Subcommittee: D02.D0.03

Book of Standards Volume: 05.02




ASTM D5303

Significance and Use

4.1 In processes producing propylene, COS usually remains with the C 3 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.

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 .

Note 1 The lower limit of this test method is believed to be below 0.1 mg/kg, depending on sample size and sensitivity of the instrumentation being used. However, the cooperative testing program was conducted in the 0.5 to 4.0 range due to limitations in preparing commercial test mixtures.

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. Specific hazards statements are given in Section 8 .


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D3609 Practice for Calibration Techniques Using Permeation Tubes

D4468 Test Method for Total Sulfur in Gaseous Fuels by Hydrogenolysis and Rateometric Colorimetry

E840 Practice for Using Flame Photometric Detectors in Gas Chromatography


Keywords

carbonyl sulfide; flame photometric detector; gas chromatography; propylene;


ICS Code

ICS Number Code 71.080.10 (Aliphatic hydrocarbons)


DOI: 10.1520/D5303-92R12

ASTM International is a member of CrossRef.

ASTM D5303

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