ASTM-D4626 › Historical Revision Information
Standard Practice for Calculation of Gas Chromatographic Response Factors
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Scope
1.1 This practice covers a procedure for calculating gas chromatographic response factors. It is applicable to chromatographic data obtained from a gaseous mixture or from any mixture of compounds that is normally liquid at room temperature and pressure or solids, or both, that will form a solution with liquids. It is not intended to be applied to those compounds that react in the chromatograph or are not quantitatively eluted. Normal C
1.2 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units are for information only.
1.3This 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.
Significance and Use
ASTM standard gas chromatographic methods for the analysis of petroleum products require calibration of the gas chromatographic system by preparation and analysis of specified reference mixtures. Frequently, minimal information is given in these methods on the practice of calculating calibration or response factors. Test Methods D 2268, D 2427, D 2804, D 2998, D 3329, D 3362, D 3465, D 3545, and D 3695
In practice, response factors are used to correct peak areas to a common base prior to final calculation of the sample composition. The response factors calculated in this practice are “multipliers” and prior to final calculation of the results the area obtained for each compound in the sample should be multiplied by the response factor determined for that compound.
It has been determined that values for response factors will vary with individual installations. This may be caused by variations in instrument design, columns, and experimental techniques. It is necessary that chromatographs be individually calibrated to obtain the most accurate data.
Keywords
gas chromatography; response factor; ICS Number Code 71.040.50 (Physicochemical methods of analysis)
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05.02 (Petroleum Products and Lubricants (II): D3711 - D6122)
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Document Number
ASTM-D4626-95(2005)
Revision Level
1995 R05 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
May 1, 2005
Document Type
Practice
Page Count
3 pages
Committee Number
D02.04.0L