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ASTM D6405-99(2004)

Historical Reaffirmation

Standard Practice for Extraction of Tannins from Raw and Spent Materials

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1.1 This practice covers extracting the tannin from raw and spent materials. The water extract obtained by this method is used to determine the tannin content of the original material. Analysis for total solids, soluble solids, and soluble non-tannins of the water extract from a material provides the information necessary to calculate the extractable tannin content of that material. The types of materials typically analyzed by this practice are products of plants such as woods, barks, leaves, nuts, fruits, roots, etc. and any of a wide variety of by-products (spent materials) from industrial processes utilizing plant products.

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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


This practice provides a standard procedure for obtaining the water-soluble materials (including tannins) from any material that can be prepared for and charged to the steam-jacketed extractor. The extraction solutions are then analyzed according to Test Methods D 4903, D 6401, and D 6402.

SDO ASTM: ASTM International
Document Number D6405
Publication Date April 1, 2004
Language en - English
Page Count 3
Revision Level 99(2004)
Supercedes
Committee D31.01
Publish Date Document Id Type View
May 10, 1999 D6405-99 Revision
Dec. 1, 2020 D6405-99R20 Reaffirmation
Nov. 1, 2014 D6405-99R14 Reaffirmation
April 1, 2009 D6405-99R09 Reaffirmation
April 1, 2004 D6405-99R04 Reaffirmation