ASTM E1747-95(2000)

Standard Guide for Purity of Carbon Dioxide Used in Supercritical Fluid Applications

SCOPE
1.1 This guide defines purity standards for carbon dioxide to ensure the suitability of liquefied carbon dioxide gas for use in SFE and SFC applications (see Guide E1449 for definitions of terms). This guide defines quantitation, labeling, and statistical standards for impurities in carbon dioxide that are necessary for successful SFE or SFC laboratory work, and it suggests methods of analysis for quantifying these impurities.  
1.2 This guide is provided for use by specialty gas suppliers who manufacture carbon dioxide specifically for SFE or SFC applications. SFE or SFC CO 2  products offered with a claim of adherence to this guide will meet certain absolute purity and contaminant detectability requirements matched to the needs of current SFE or SFC techniques. The use of this guide allows different SFE or SFC CO 2  product offerings to be compared on an equal purity basis.  
1.3 This guide considers contaminants to be those components that either cause detector signals that interfere with those of the target analytes or physically impede the SFE or SFC experiment.  
1.4 The values stated in SI units are to be regarded as the standard.  
1.5 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• ICS: 71.100.20 - Gases for industrial application
• Technical Committee: E13 - Molecular Spectroscopy and Separation Science
• Drafting Committee: E13.19 - Separation Science

Relations

• Replaces: ASTM E1747-95 - Standard Guide for Purity of Carbon Dioxide Used in Supercritical Fluid Applications
• Effective Date: 01-Jan-1995
• Replaced By: ASTM E1747-95(2005) - Standard Guide for Purity of Carbon Dioxide Used in Supercritical Fluid Applications
• Effective Date: 01-Sep-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1747 – 95 (Reapproved 2000)
Standard Guide for
Purity of Carbon Dioxide Used in Supercritical Fluid
1
Applications
This standard is issued under the fixed designation E1747; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Therapidcommercialdevelopmentofcarbondioxideforuseinsupercriticalfluidextraction(SFE)
and supercritical fluid chromatography (SFC) has hastened the need to establish common purity
standards to be specified by specialty gas suppliers. As a consequence of its isolation from
petrochemical side-streams or as a by-product of fermentation or ammonia synthesis, carbon dioxide
contains a wide range of impurities that can interfere with analytical quantification or instrument
operation.Thisguideisintendedtoserveasaguidetospecialtygassuppliersfortestingthesuitability
of carbon dioxide for use in SFC and SFE applications.
1. Scope 2. Referenced Documents
1.1 Thisguidedefinespuritystandardsforcarbondioxideto 2.1 ASTM Standards:
ensure the suitability of liquefied carbon dioxide gas for use in D2504 Test Method for Noncondensable Gases in C and
3
2
SFEandSFCapplications(seeGuideE1449fordefinitionsof Lighter Hydrocarbon Products by Gas Chromatography
terms).This guide defines quantitation, labeling, and statistical D2820 TestMethodforCThroughC Hydrocarbonsinthe
5
3
standards for impurities in carbon dioxide that are necessary Atmosphere By Gas Chromatography
for successful SFE or SFC laboratory work, and it suggests D3670 Guide for Determination of Precision and Bias of
4
methods of analysis for quantifying these impurities. Methods of Committee D-22
1.2 Thisguideisprovidedforusebyspecialtygassuppliers D3686 Practice for Sampling Atmospheres to Collect Or-
who manufacture carbon dioxide specifically for SFE or SFC ganic Compound Vapors (Activated Charcoal Tube Ad-
4
applications.SFEorSFCCO productsofferedwithaclaimof sorption Method)
2
adherence to this guide will meet certain absolute purity and D3687 Practice forAnalysis of Organic CompoundVapors
contaminantdetectabilityrequirementsmatchedtotheneedsof Collected by the Activated Charcoal Tube Adsorption
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current SFE or SFC techniques. The use of this guide allows Methods
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differentSFEorSFCCO productofferingstobecomparedon D4178 Practice for Calibrating Moisture Analyzers
2
an equal purity basis. D4532 Test Method for Respirable Dust in Workplace
4
1.3 This guide considers contaminants to be those compo- Atmosphere
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nentsthateithercausedetectorsignalsthatinterferewiththose E260 Practice for Packed Column Gas Chromatography
of the target analytes or physically impede the SFE or SFC E355 Practice for Gas Chromatography Terms and Rela-
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experiment. tionships
1.4 The values stated in SI units are to be regarded as the E594 Practice forTesting Flame Ionization Detectors Used
6
standard. in Gas Chromatography
1.5 This standard does not purport to address all of the E697 Practice for Use of Electron-Capture Detectors in
6
safety concerns, if any, associated with its use. It is the Gas Chromatography
responsibility of the user of this standard to establish appro- E 1449 Guide for Supercritical Fluid Chromatography
6
priate safety and health practices and determine the applica- Terms and Relationships
bility of regulatory limitations prior to use.
2
Annual Book of ASTM Standards, Vol 05.01.
1 3
This guide is under the jurisdiction of ASTM Committee E13 on Molecular Discontinued—See 1992 Annual Book of ASTM Standards, Vol 05.01.
4
Spectroscopy and is the direct responsibility of Subcommittee E13.19 on Chroma- Annual Book of ASTM Standards, Vol 11.03.
5
tography. Annual Book of ASTM Standards, Vol 05.02.
6
Current edition approved Sept. 10, 1995. Published December, 1995. Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E 1747
E1510 Practice for Installing Fused Silica Open Tubular detrimental to both SFE and SFC applications. Species repre-
6
Capillary Columns in Gas Chromatographs sentative of this class include nonchromatographicable hydro-
7
2.2 CGA Publications: carbonsorhalocarbonoils,greases,andinorganicparticles(for
CGA P-1 Safe Handling of Compressed Gases in Contain- example, silica). A maximum concentration of 1 ppm will be
ers considered acceptable.
CGA V-7 Standard for Hydrogen Piping Systems at Con-
4. Purity Specifications for SFE or SFC Grade CO
2
sumer Locations
4.1 This guide proposes the following minimum purity
CGA P-9 The Inert Gases: Argon, Nitroge
...