1、Designation:D246213Standard Test Method forMoisture in Wool by Distillation With Toluene1This standard is issued under the fixed designation D2462;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in
2、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 covers the determination of the amountof moisture present in grease wool,scoured wool,carded wool,garnetted wool,wool top and interm
3、ediate wool products,androvings,by distillation with toluene.1.2 Equations are given for calculating the amount of waterpresent as moisture content(as-received basis)and moistureregain(dry fiber)basis.The term that corresponds to the basisused in the calculation and report must always be stated.1.3
4、This test method is not applicable to material known tocontain any steam-distillable,water-soluble matter.If it issuspected that such matter is present,the method should beused with caution.1.4 Xylene or other solvents should not be substituted fortoluene as no other solvents have been evaluated for
5、 use in thisstandard.NOTE1The determination of moisture in wool by oven-drying iscovered in Test Method D1576 and for textile materials in general in TestMethods D2654.A method for sampling wool for the determination ofmoisture in wool is covered in Practice D2525.1.5 This standard does not purport
6、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 applica-bility of regulatory limitations prior to use.For specific safetyhazard statements,see Section 8.2.
7、Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1060 Practice for Core Sampling of Raw Wool in Packagesfor Determination of Percentage of Clean Wool FiberPresentD1576 Test Method for Moisture in Wool by Oven-DryingD1776 Practice for Conditioning and Testing TextilesD225
8、8 Practice for Sampling Yarn for TestingD2525 Practice for Sampling Wool for MoistureD2654 Test Method for Moisture in Textiles(Withdrawn1998)3D3333 Practice for Sampling Manufactured Staple Fibers,Sliver,or Tow for TestingD4845 Terminology Relating to WoolE123 Specification forApparatus for Determi
9、nation of Waterby Distillation3.Terminology3.1 For all terminology related to D13.13,Wool and Felt,see Terminology D4845.3.1.1 The following terms are relevant to this standard:grease wool,moisture content,moisture-free,moisture regain,oven-dried,pulled wool,raw wool,recycled wool,as definedin the W
10、ool Products Labeling Act as amended in 1980,scoured wool,virgin wool,wool,wool,as defined in the WoodProducts Labeling Act of 1939.3.2 For definitions of all other textile terms see TerminologyD123.4.Summary of Test Method4.1 Asample or specimen of wool or material made of woolis weighed,then stabi
11、lized in the laboratory atmosphere inwhich the specimen is prepared,and reweighed.Any resultingchange in mass is used to calculate the original moisturecontent of the sample or specimen from the results observed onthe stabilized specimen.4.2 The specimen is immersed in water-saturated toluenewhich i
12、s then heated,the distilled water vapor and solventvapor are condensed and collected in a graduated trap,whereinthe water separates and settles to the bottom.After cooling ina water bath to achieve a specified temperature,the volume ofwater collected in the trap is read from the graduated trap andco
13、nverted to its equivalent weight.4.3 Results are calculated as percent moisture content orpercent moisture regain using the appropriate equation.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.13 on Wool and Felt.Curren
14、t edition approved July 1,2013.Published August 2013.Originallyapproved in 1966.Last previous edition approved in 2008 as D2462 90(2008).DOI:10.1520/D2462-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMS
15、tandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Significance
16、 and Use5.1 Test Method D2462 for testing for moisture in wool isconsidered satisfactory for acceptance testing of commercialshipments since current estimates of between-laboratory pre-cision are acceptable.5.1.1 In case of a dispute arising from differences inreported test results when using Test Method D2462 foracceptance testing of commercial shipments,the purchaser andthe supplier should conduct comparative testing to determine ifthere is a statistical bias between their laboratories.Compete
