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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 |
| 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 |
| Benzene | % Volume | 0.09 to 1.091 |
| Toluene | % Volume | 0.698 to 31.377 |
| Ethylbenzene | % Volume | 0.5 to 3.175 |
| Xylenes | % Volume | 3.037 to 18.955 |
| Naphthalene | % Volume | 0.019 to 0.779 |
| Methylnaphthalenes | % Volume | 0.21 to 1.484 |