ASTM D453 Standard Test Method for Tar Acids in Creosote-Coal Tar Solutions
3. Summary of Test Method
3.1 Acoustic solution is separated and acidified with H2SO4 to liberate tar acids that are measured in a graduated funnel.
4. Significance and Use
4.1 This test method covers the determination of tar acid content of creosote coal tar solutions so that comparison can be made with existing international standards, for example, British Standard 144.
