1、Designation:D640499(Reapproved 2014)Standard Practice forSampling Vegetable Materials Containing Tannin1This standard is issued under the fixed designation D6404;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisi
2、on.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 practice covers obtaining representative samplesfrom shipment lots of botanical materials containing tannin.1.2 The values stated
3、 in SI units are to be regarded as thestandard.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 safet
4、y and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1517 Terminology Relating to Leather2.2 ALCA Method:J10 Sampling Vegetable Materials Containing Tannin33.Terminology3.1 Definitions:3.1.1 For definitions of gener
5、al leather and tanning termsused in this practice refer to Terminology D1517.3.1.2 quarteringthe term applied to a method described inthis practice of reducing the size of samples without impairingtheir representative quality.3.1.3 tanninan astringent substance found in the variousparts of plants su
6、ch as bark,wood,leaves,nuts,fruits,roots,etc.3.1.4 vegetable tanninsmixtures of substances(naturalproducts)obtained from plant tissues by water extractionwhich have the chemical and physical properties necessary toconvert animal hides and skins into leather.4.Summary of Practice4.1 This practice des
7、cribes methods for obtaining represen-tative samples for analysis from shipments of vegetable tan-ning materials and tannin extracts.5.Significance and Use5.1 This practice provides standard procedures for obtainingrepresentative samples of various materials used as a source oftannins for the tannin
8、g industry.5.2 Procedures are described for obtaining representativesamples of economical and convenient quantities from a lot,orsections of a lot,of material for examination and analysis sothat agreement may be reached with regard to the extent ofvariation of quality in different portions of a lot
9、and the averagequality of the entire lot of material.5.3 No directions for sampling,however explicit,can takethe place of judgment,skill,and previous experience on thepart of persons actually engaged in the sampling or thesupervision of the sampling.These directions are intended tosupplement that ex
10、perience and,particularly,to serve as aguide in the selection of the method which is to be used,incommon,by each of two or more contracting parties.5.4 Tanning materials contain moisture in varying amounts,depending both on the nature of the material and on theclimatic conditions,so that sampling mu
11、st be carried out asquickly as is consistent with thoroughness in order to avoidchanges in moisture content.6.Apparatus6.1 Balance,analytical balance which will weigh the quan-tity of material specified in this practice to an accuracy of 610g(6 0.35 oz).6.2 Canvas,11-oz weight and of sufficient size
12、(as deter-mined by the discretion of the sampler or analyst)for use inmixing and quartering samples.6.3 Sieve,with round openings 1.27 cm(0.50 in.)indiameter.6.4 Sampling Tool,this tool shall be made of brass or othercorrosion-resistant metal tubing,with solid handle attached,similar to that describ
13、ed below and illustrated in Fig.1.1This practice is under the jurisdiction ofASTM Committee D31 on Leather andis the direct responsibility of Subcommittee D31.01 on Vegetable Leather.This testmethod has been adapted from and is a replacement for Method J10 of the OfficialMethods of the American Leat
14、her Chemists Association.Current edition approved Nov.1,2014.Published December 2014.Originallyapproved in 1999.Last previous edition approved in 2009 as D6404 99(2009).DOI:10.1520/D6404-99R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servi
15、ceastm.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,P.O.Box 210014,Cincinnati,OH
16、45221-0014.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4.1 Thin brass or other corrosion-resistant metal tubing,37 cm long and 17.5 mm diameter,is used.Asolid steel handle,6 cm long,is welded to one end of the tube.A section 11 mmwide and 30 cm long is cut out of the side of the tube and theedges of this opening sharply beveled.The working end is cutto a sharp point for piercing sacks,or other tough materials,like plantation gam
