1.1 This test method2 covers the de

1.1 This test method2 covers the determination by highionizing voltage, low resolution mass spectrometry of 18aromatic hydrocarbon types and 3 aromatic thiophenotypes instraight run aromatic petroleum fractions boiling within therange from 205 to 540°C (400 to 1000°F) (corrected toatmospheric pressure). Samples must be nonolefinic, mustcontain not more than 1 mass % of total sulfur, and mustcontain not more than 5 % nonaromatic hydrocarbons. Compositiondata are in volume percent.NOTE 1—Although names are given to 15 of the compound typesdetermined, the presence of other compound types of the same empiricalformulae is not excluded. All other compound types in the sample,unidentified by name or empirical formula, are lumped into six groups inaccordance with their respective homologous series.1.2 The values stated in acceptable SI units are to beregarded as the standard. The values given in parentheses areprovided for information purposes only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriatesafety and health practices and determine the applicabilityof regulatory limitations prior to use.