ASTM D305-84(R2020) pdf free download

ASTM D305-84(R2020) pdf free download.Standard Test Method for Solvent-Extractable Material in Black Pigments
1. Scope
1.1 This test method covers the determination of the solvent-extractable material in black pigments such as carbon black, lampblack, and bone black. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Apparatus
4.1 Extraction Apparatus, consisting of a flask, siphon cup, and a condenser similar to the apparatus shown in either Fig. 1 or Fig. 2. N OTE 1—A Sophlet apparatus may be used as an alternative. 4.2 Extraction Thimbles—The thimble must be made of greaseless paper and be of correct size to fill the selected apparatus. N OTE 2—The recommended thimble size for each of the apparatus shown in Fig. 1 is listed below:4.3 The thimbles are available in various heights and widths with two thickness levels, single thickness or double thickness. Single-thickness thimbles are recommended for this extraction procedure.
5. Reagents and Material
5.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Commit- tee on Analytical Reagents of the American Chemical Society, where such specifications are available. 3 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 5.2 Solvent—Acetone and benzene are the most commonly used solvents (see Specification D329); however, other sol- vents may be used as agreed upon. 5.3 Glass Wool.
6. Procedure
6.1 Weight approximately 10 g of pigment (moisture-free) into a weighed thimble and record the weight to 0.1 g. For pigments with high apparent density (bone black, iron oxides, etc.) a 40-g sample is recommended. Plug the open end of the thimble with glass wool and place in the siphon cup. Add 200 to 250 mL of the solvent to the previously dried flask.6.2 When using acetone as the extraction solvent, extract continuously for 4 h, heating at a rate such that the time required to fill and empty the siphon cup will not exceed 8 min. With other solvents extract for 16 h. N OTE 3—If particles of carbon have escaped from the cup into the extraction liquid, filter the liquid, wash the paper with solvent, and return the total filtrate to the extraction flask, prior to continuing with 6.3. 6.3 Transfer quantitatively the extract solution to a 400-mL beaker that has been weighed to the nearest 0.1 g, and evaporate off the solvent on a steam bath or plate. Remove the beaker from the bath or hot plate just before the last trace ofthe solvent disappears. Dry the dish for 1 h at 105°C (221°F). Cool and weigh to the nearest 0.1 g.