ACIDITY OF HYDROCARBON LIQUIDS AND THEIR DISTILLATION RESIDUES: D1093
EXPLANATION
Some petroleum products are treated with mineral acid during the refining process. Any residual mineral acid in a petroleum product is undesirable. This test makes a qualitative determination of the acidity of hydrocarbon liquids and their distillation residues. The results are qualitative. Basicity determination can also be done by a small change in the procedure (see below).
TEST SUMMARY
A sample is shaken with water and the aqueous layer is tested for acidity using methyl orange indicator (red color). Basicity can be determined using phenolphthalein indicator (pink color) instead of the methyl orange indicator.
TEST PRECISION
This is a pass-fail qualitative test and no precision or bias estimates can be made.
