1.1 This test method covers and provides for the analysis of high-purity (greater than 99.5 % by volume) n-heptane and isooctane (2,2,4-trimethylpentane), which are used as primary reference standards in determining the octane number of a
ASTM
Standard Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography
STD-49808
1993
2008-05-01
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