ASTM D565 Standard Test Method for Carbonizable Substances in White Mineral Oil
8. Interpretation of Results
8.1 White mineral oil shall be reported as passing the test only when the oil layer shows no change in color (see Note 2) and when the acid layer is not darker than the reference standard colorimetric solution.
NOTE 2 - A bluish haze or a slight pink or yellow color in the oil layer should not be interpreted as a change in color.
8.2 If the oil layer is discolored or if the acid layer is darker than the reference standard colorimetric solution, white mineral oil shall be reported as not passing the test.
9. Precision and Bias
9.1 No statement is made about either the precision or bias of this test method since the result merely states whether there is conformance to the criteria for success specified in the procedure.
10. Keywords
10.1 carbonizable substances; mineral oil
