ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
20. Precision and Bias
20.1 Precision - The precision for four specific petroleum products are given in A1.7 (for white mineral oil), in A2.5 (for refined petroleum wax), in A3.5 (for USP petrolatum), and in A4.5 (for nonstaining rubber processing or extender oils).
20.2 The precision for other petroleum products should be determined by cooperative testing on representative types of such other petroleum products.
20.3 Bias - Bias cannot be determined for these procedures since there are no acceptable reference standards.
21. Keywords
21.1 petroleum products; ultraviolet absorbance; ultraviolet absorptivity; ultraviolet spectroscopy
