BENZENE/TOLUENE IN GASOLINE BY INFRARED IR SPECTROSCOPY: ASTM D4053
(Equivalent Test Method: IP 429)
EXPLANATION
Toluene and heavier aromatic compounds have some interference in this test method. To minimize this interference, the procedure includes a correction. Errors due to other sources of interference may be partially compensated for by calibrating with gasoline stocks containing little or no benzene but which otherwise are similar in aromatic content to the sample to be analyzed.
TEST SUMMARY
A gasoline sample is examined by infrared spectroscopy and following a correction for interference is compared with calibration blends of known benzene concentration.
TEST PRECISION
Repeatability: 0.08 volume %
Reproducibility: 0.18 volume %
The bias of this test method has not been established.
