EXPLANATION
This test method is applicable to crude oils with sediments up to about 0.15 mass %.
TEST SUMMARY
A crude oil sample is dissolved in hot toluene and filtered under vacuum through a 0.45 μm porosity membrane filter. The filter with residue is washed, dried, and weighed.
TEST PRECISION
More sediment is recovered from crude oil by this test method compared to the results by Test Method ASTM D473.