1.1 ,This test method covers the determination of the boiling range distribution of petroleum products. The test method is applicable to petroleum products and fractions having a final boiling point of 538 ,°,C (1000 ,°,F) or lower at atmospheric pressure as measured by this test method. This test method is limited to samples having a boiling range greater than 55.5 ,°,C (100 ,°,F), and having a vapor pressure sufficiently low to permit sampling at ambient temperature.