ASTM D4072 Standard Test Method for Toluene-Insoluble (TI) Content of Tar and Pitch
3. Summary of Test Method
3.1 The sample is digested, then extracted with hot toluene in an alundum thimble. The insoluble matter is dried and weighed.
4. Significance and Use
4.1 This test method is useful for evaluating and characterizing tars and pitches and as one element in establishing the uniformity of shipments or sources of supply.
