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Standard Test Method for Hydrocarbon Types, Oxygenated Compounds, and Benzene in Spark Ignition Engine Fuels by Gas Chromatography
Automatische name übersetzung:
Standardtestverfahren für Kohlenwasserstofftypen, sauerstoffhaltigen Verbindungen und Benzol in Ottomotor Kraftstoffe durch Gaschromatographie
NORM herausgegeben am 1.10.2013
Bezeichnung normen: ASTM D6839-13
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.10.2013
SKU: NS-36735
Zahl der Seiten: 12
Gewicht ca.: 36 g (0.08 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
aromatics, gas chromatography, gasoline, hydrocarbon type, multidimensional gas chromatography, naphthenes, olefins, oxygenates, saturates, spark-ignition engine fuels, ICS Number Code 71.040.40 (Chemical analysis)
Significance and Use | ||||||||||||||
5.1 A knowledge of spark-ignition engine fuel composition is useful for regulatory compliance, process control, and quality assurance. 5.2 The quantitative determination of olefins and other hydrocarbon types in spark-ignition engine fuels is required to comply with government regulations. 5.3 This test method is not applicable to M85 fuels, which contain 85 % methanol. |
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1. Scope | ||||||||||||||
1.1 This test method covers the quantitative determination of saturates, olefins, aromatics, and oxygenates in spark-ignition engine fuels by multidimensional gas chromatography. Each hydrocarbon type can be reported either by carbon number (see Note 1) or as a total. 1.2 This test method is not intended
to determine individual hydrocarbon components except benzene.
1.3 This test method is divided into two parts, Part A and Part B. 1.3.1 Part A is applicable to automotive motor gasoline for which precision (Table 9) has been obtained for total volume fraction of aromatics of up to 50 %; a total volume fraction of olefins from about 1.5 % up to 30 %; a volume fraction of oxygenates, from 0.8 % up to 15 %; a total mass fraction of oxygen from about 1.5 % to about 3.7 %; and a volume fraction of benzene of up to 2 %. Although this test method can be used to determine higher-olefin contents of up to 50 % volume fraction, the precision for olefins was tested only in the range from about 1.5 % volume fraction to about 30 % volume fraction. The method has also been tested for an ether content up to 22% volume fraction but no precision data has been determined. 1.3.1.1 This test method is specifically developed for the analysis of automotive motor gasoline that contains oxygenates, but it also applies to other hydrocarbon streams having similar boiling ranges, such as naphthas and reformates. 1.3.2 Part B describes the procedure for the analysis of oxygenated groups (ethanol, methanol, ethers, C1.4 Oxygenates as specified in Test Method D4815 have been verified not to interfere with hydrocarbons. Within the round robin sample set, the following oxygenates have been tested: MTBE, ethanol, ETBE, TAME, iso-propanol, isobutanol, tert-butanol and methanol. The derived precision data for methanol do not comply with the precision calculation as presented in this International Standard. Applicability of this test method has also been verified for the determination of n-propanol, acetone, and di-isopropyl ether (DIPE). However, no precision data have been determined for these compounds. 1.4.1 Other oxygenates can be determined and quantified using Test Method D4815 or D5599. 1.5 The method is harmonized with ISO 22854. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. |
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2. Referenced Documents | ||||||||||||||
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