ASTM D2425-21

1.1”This test method covers an analytical scheme using the mass spectrometer to determine the hydrocarbon types present in conventional and synthesized hydrocarbons that have a boiling range of 160””’C to 343””’C (320””’F to 650””’F), 5”’% to 95”’% by volume”’ as determined by Test Method D86. Samples with average carbon number value of paraffins between C₁₂ and C₁₆ and containing paraffins from C₁₀ and C₁₈ can be analyzed. Eleven hydrocarbon types are determined. These include: paraffins, noncondensed cycloparaffins, condensed dicycloparaffins, condensed tricycloparaffins, alkylbenzenes, indans or tetralins, or both, C_nH _2n-10”'(indenes, etc.), naphthalenes, C_nH_2n-14 ”'(acenaphthenes, etc.), C_nH _2n-16”'(acenaphthylenes, etc.), and tricyclic aromatics.