ASTM D2008 - Ultraviolet Absorbance and Absorptivity of Petroleum Products
Signiﬁcance and Use
5.1 The absorbance of liquids and the absorptivity of liquid and solids at speciﬁed wavelengths in the ultraviolet are useful in characterizing petroleum products.
1.1 This test method covers the measurement of the ultra-violet absorption of a variety of petroleum products. It covers the absorbance of liquids or the absorptivity of liquids and solids, or both, at wavelengths in the region from 220 to 400 nm of the spectrum.
1.2 The use of this test method implies that the conditions of measurement—wavelength, solvent (if any), sample path length, and sample concentration—are speciﬁed by reference to one of the examples of the application of this test method in the annexes or by a statement of other conditions of measurement.
1.3 Examples of the application of this test method are the absorptivity of reﬁned petroleum wax, and the absorptivity of USP petrolatum.
Extracted, with permission, from ASTM D2008-12 - Ultraviolet Absorbance and Absorptivity of Petroleum Products, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete standard may be purchased from ASTM International, astm.org