Finding the right solvent ratio to dissolve dark, heavy oil without causing phase separation is tricky. The ASTM D2074 provides specific guidance on troubleshooting turbidity.
: It covers the determination of total, primary, secondary, and tertiary amine values in fatty amines. Methodology astm d2074 pdf
: The milligrams of potassium hydroxide (KOH) equivalent to the basicity of 1 gram of the sample. Finding the right solvent ratio to dissolve dark,