BOILING RANGE DISTRIBUTION OF GASOLINE FRACTIONS BY GAS CHROMATOGRAPHY: D3710
EXPLANATION
The determination of the boiling range distribution of gasoline by GC distillation helps understand the composition of the components from which the gasoline was blended. It facilitates on-line controls at the refinery and its results offer improved means of describing several car performance parameters. This test method covers petroleum products and fractions with a final boiling point of 500° F 260° C or lower as measured by this test method. This test method is designed to measure the entire boiling range of gasoline with either high or low Reid vapor pressure.
TEST SUMMARY
The sample is injected into a gas chromatographic column which separates hydrocarbons in boiling point order. The column temperature is raised at a reproducible rate and the area under the chromatogram is recorded throughout the run. The calibration is done using a known mixture of hydrocarbons covering the boiling range expected in the sample.
TEST PRECISION
The precision of this test method depends upon the shape of the boiling range distribution curve. Precision varies with the percent recovered and the rate of temperature change with percent recovered: dT / dV, where T is the temperature and V is the percent recovered.
Bias of this test method is not known.
