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Standard Guide for Purity of Carbon Dioxide Used in Supercritical Fluid Applications
STANDARD published on 1.11.2011
Designation standards: ASTM E1747-95(2011)
Note: WITHDRAWN
Publication date standards: 1.11.2011
SKU: NS-42869
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
fluid purity, supercritical carbon dioxide, supercritical fluid chromatography, supercritical fluid extraction , Carbon dioxide, Purity analysis, SFC (supercritical fluid chromatography), SFE/SFC applications, Supercritical fluid extraction (SFE), ICS Number Code 71.100.20 (Gases for industrial application)
1. 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 carbon dioxide (CO2) 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 CO2 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 standard. No other units of measurement are included in this 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 limitations prior to use. |
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