ASTM D8071-20

1.1 This test method is a standard procedure for the determination in percent mass or percent volume of hydrocarbon group types (paraffins, isoparaffins, olefins, naphthenes, aromatics), methanol, ethanol, benzene, toluene, ethylbenzene, xylenes, naphthalene, and methylnaphthalenes in automotive spark-ignition engine fuels using gas chromatography and vacuum ultraviolet detection (GC-VUV).

1.1.1 The concentration ranges for which precision has been determined are as follows:

Property	Units	Applicable Range
Paraffins	% Volume	3.572 to 23.105
Isoparaffins	% Volume	22.697 to 71.993
Olefins	% Volume	0.011 to 44.002
Olefin	% Mass	0.027 to 41.954
Naphthenes	% Volume	0.606 to 18.416
Aromatics	% Volume	14.743 to 58.124
Methanol	% Volume	0.063 to 3.426
Ethanol	% Mass	0.042 to 15.991
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