3.1.1.1 Discussion—This test method expresses the quantity of base as milligrams of potassium hydroxide per gram of
sample, that is required to titrate a sample in a mixture of toluene and propan-2-ol to which a small amount of water has
been added from its initial meter reading in millivolts to a meter reading in millivolts corresponding to an aqueous basic
buffer solution or a well-defined inflection point as specified in
the test method.
3.1.1.2 Discussion—This test method provides additional information. The quantity of base, expressed as milligrams of
potassium hydroxide per gram of sample, required to titrate a sample in the solvent from its initial meter reading in millivolts to a meter reading in millivolts corresponding to a freshly prepared aqueous acidic buffer solution or a
well-defined inflection point as specified in the test method shall be reported as the strong acid number.
3.1.1.3 Discussion—The causes and effects of the so-called strong acids and the causes and effects of the other acids can be very significantly different. Therefore, the user of this test method shall differentiate and report the two, when they are
found.