ASTM D6401-1999(2016) 9829 Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials《测定植物鞣质材料提取物中非鞣质和鞣质的标准试验方法》.pdf
《ASTM D6401-1999(2016) 9829 Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials《测定植物鞣质材料提取物中非鞣质和鞣质的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6401-1999(2016) 9829 Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials《测定植物鞣质材料提取物中非鞣质和鞣质的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D6401 99 (Reapproved 2016)Standard Test Method forDetermining Non-Tannins and Tannin in Extracts ofVegetable Tanning Materials1This standard is issued under the fixed designation D6401; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method is intended for use in determining thequantity of soluble non-tannins and
3、 tannin in solutions oftannin extracts, water extracts of vegetable tanning materials,or tanning liquors. The method is applicable to the analysis ofliquid, solid, pasty, and powdered extracts and to extracts ofraw or spent materials.1.2 The values stated in SI units are to be regarded as thestandar
4、d. The inch-pound units given in parentheses are forinformation only.1.3 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 appro-priate safety and health practices and determine the
5、applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D2617 Test Method for Total Ash in LeatherD3790 Test Method for Volatile Matter (Moisture) ofLeather by Oven DryingD4901 Practice for Preparation of Solution of Liquid Veg-etable Tannin ExtractsD4902 Tes
6、t Method for Evaporation and Drying of Analyti-cal SolutionsD4903 Test Method for Total Solids and Water in VegetableTanning Material ExtractsD4905 Practice for Preparation of Solution of Solid, Pastyand Powdered Vegetable Tannin ExtractsD6402 Test Method for Determining Soluble Solids andInsolubles
7、 in Extracts of Vegetable Tanning MaterialsD6405 Practice for Extraction of Tannins from Raw andSpent Materials2.2 ALCA Method:A22 Non-Tannins and Tannin33. Terminology3.1 Definitions:3.1.1 soluble non-tanninsnon-volatile materials present intannin extracts and raw or spent materials that are dissol
8、ved orsuspended in water, are part of the soluble solids determined byTest Method D6402, and do not react with or bind to hidepowder when mixed as in this test method.3.1.2 tanninsnon-volatile materials present in tannin ex-tracts and raw or spent materials that are dissolved or sus-pended in water,
9、 are part of the soluble solids determined byTest Method D6402, and do react with or bind to hide powderwhen mixed as in this test method.4. Summary of Test Method4.1 An aliquot of the analytical solution prepared fromtannin extracts (Practices D4901 or D4905) or of the waterextract from raw or spen
10、t materials (Practice D6405) is driedovernight in a forced-air oven (Test Method D4902) and thesolid residue remaining is determined and defined as the totalsolids for that sample (Test Method D4903).Another aliquot ofthe same solution is passed through a specified filteringprocedure and the quantit
11、y of solid residue remaining in thefiltrate is determined and defined as the soluble solids for thatsample; the calculated difference between the total solids andthe soluble solids is defined as the insolubles for that sample(Test Method D6402). Another aliquot of the original analyti-cal solution o
12、r water extract is mixed with a prepared hidepowder material, with the resulting solution being passedthrough the same filtering procedure as for the soluble solidsanalysis. The quantity of solid residue remaining in the filtrateis determined and defined as the soluble non-tannins for thatsample; th
13、e calculated difference between the total soluble1This test method is under the jurisdiction ofASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. Thismethod has been adapted from, and is a replacement for, MethodA22 of the OfficialMethods of th
14、e American Leather Chemists Association.Current edition approved Sept. 1, 2016. Published October 2016. Originallyapproved in 1999. Last previous edition approved in 2009 as D6401 99 (2009).DOI: 10.1520/D6401-99R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM
15、Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Official Methods of the American Leather Chemists Association. Availablefrom the American Leather Chemists Association, University of Cincinnati,
16、 P.O.Box 210014, Cincinnati, OH 45221-0014.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1solids and the soluble non-tannins is defined as the tannincontent for that sample.5. Significance and Use5.1 This test method is used to deter
17、mine the proportion ofthe total soluble solids which are soluble non-tannins and theproportion which are tannins in a solution of tannin extract orin the water extract from raw or spent materials prepared fortannin analysis.5.2 The specimens are aliquots from the analytical solutionsprepared from ta
18、nnin extracts or the water extract solutionsprepared from raw or spent materials.5.3 The soluble non-tannins are defined as the portion of thesoluble solids which are not absorbed or bound by a preparedhide powder material.5.4 The tannins are defined as the portion of the solublesolids which are abs
19、orbed or bound by a prepared hide powdermaterial.5.5 The results of this test method are dependent on a greatmany variables, but particularly upon:5.5.1 The temperature conditions under which the solutionswere prepared and stored and the temperature at which thecurrent analysis is performed;5.5.2 Th
20、e uniformity and consistency of the Kaolin pastelayer deposited onto the filter paper;5.5.3 The rate of solution run-out from the pipette;5.5.4 Conditions related to the properties of the hide powderused to react with the tannin content of the solution; etc. It is,therefore, essential that the metho
21、d be followed exactly inorder to obtain reproducible results both among specimenswithin a laboratory and for analyses between laboratories.6. Apparatus and Reagents6.1 Tannin Dish, crystallizing dish, borosilicate glass, 50mm tall, 70 mm outside diameter. The bottom corner shall berounded to a radiu
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