ASTM D305-84(2020) pdf download

10-05-2020 comment

ASTM D305-84(2020) pdf free download.Standard Test Method for Solvent-Extractable Material in Black Pigments.The size of this pdf file is 804K.
ASTM D305-84(2020) covers the determination of the solvent-extractable material in black pigments such as carbon black, lampblack, and bone black.
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.
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.
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 Committee 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.
Precision data are not available at this time. When they are available the appropriate precision statements will be added.

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