ASTM D305-84 (2020) pdf free.Standard Test Method for Solvent-Extractable Material in Black Pigments.
This test method covers the determination of thesolvent-extractable material in black pigments such as carbonblack, lampblack, and bone black.
The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.
This standard does not purport to address all of thesafety concerns，if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety, health,and environmental practices and determine the applicability of regulatory limitations prior to use.This international standard was developed in accor-dance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards，Guides and Recommendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.
The thimbles are available in various heights and widthswith two thickness levels, single thickness or double thickness.Singlethickness thimbles are recommended for this extractionprocedure.
Reagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available. Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.
Acetone and benzene are the most commonlyused solvents (see Specification D329); however，other solvents may be used as agreed upon.Weight approximately 10 g of pigment (moisture-free)into a weighed thimble and record the weight to 0.1 g.Forpigments with high apparent density (bone black, iron oxides,etc.) a 40g sample is recommended. Plug the open end of thethimble with glass wool and place in the siphon cup.Add 200to 250 mL of the solvent to the previously dried flask.
When using acetone as the extraction solvent，extractcontinuously for 4 h, heating at a rate such that the timerequired to fill and empty the siphon cup will not exceed 8 min.With other solvents extract for 16 h.ASTM D305 pdf download.