(Equivalent Test Method: IP 356)
TEST SUMMARY
This test method covers the determination of 0.02 to 2 % in crude oil. Mercaptan and sulfide interfere. At levels <500 ppm as sulfur their interference is insignificant. After homogenizing the crude oil with a mixer, an aliquot in a mixed solvent is titrated to an electrometric end point using either a standard or a pyridine-free Karl Fischer reagent.
TEST PRECISION
Where X is the sample mean from 0.00 to 2 %.
Compared to the results of Test Method ASTM D4006, no significant bias has been found.