ASTM_D_1113_-_13.pdf

Designation:D111313Standard Test Method forVegetable Matter and Other Alkali-Insoluble Impurities inScoured Wool1This standard is issued under the fixed designation D1113;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 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 contentof oven-dried,ash-free,alcohol extractive-free vegetable mat-ter and other alkali-insoluble impurities present in scouredwool.It is also applicable to“related fibers”such as the hairfrom the goat,camel,alpaca,and other animals.NOTE1The determination of clean wool fiber present on a laboratoryscale is covered in Test Method D584,the determination of clean woolfiber present on a commercial scale is covered in Test Method D1334,andthe calculation of commercial weight and yield of various commercialcompositions(formerly covered in Appendix to Test Method D584)iscovered in Practice D2720.1.2 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 applica-bility of regulatory limitations prior to use.For specific safetyhazard statements,see Section 8.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD584 Test Method for Wool Content of Raw WoolLaboratory ScaleD1334 Test Method for Wool Content of Raw WoolCommercial ScaleD2720 Practice for Calculation of Commercial Weight andYield of Scoured Wool,Top,and Noil for Various Com-mercial CompositionsD4845 Terminology Relating to Wool3.Terminology3.1 For all terminology relating to D13.13,Wool and WoolFelt,refer to Terminology D4845.3.1.1 The following terms are relevant to this standard:other alkali-insoluble impurities,oven-dried,vegetable matterbase.3.1.2 For definitions of other textile terms used in this testmethod,refer to Terminology D123.4.Summary of Test Method4.1 The wool,or other animal fiber,is dissolved in a boiling3%sodium hydroxide solution or a hot 10%sodium hydroxidesolution under specified controlled conditions.The weights ofthe ash-free,oven-dried components of the undissolved residueare converted by means of tabulated factors to the correspond-ing weights of vegetable matter base and other alkali-insolubleimpurities.5.Significance and Use5.1 Test Method D1113 is considered satisfactory for accep-tance testing of commercial shipments,and the procedure hasbeen used extensively in the trade for this purpose,particularlyin connection with the determination of clean wool fiberpresent by Test Method D584.The procedure in Test MethodD1113 is used by the U.S.Customs Service for the determi-nation of the vegetable matter in importations of raw wool onwhich the allowance for loss of wool during commercialcleaning is based in part.35.1.1 In case of a dispute arising from differences inreported test results when using Test Method D1113 foracceptance testing of commercial shipments,the purchaser andthe supplier should conduct comparative tests to determine ifthere is a statistical bias between their laboratories.Competentstatistical assistance is recommended for the investigation ofbias.As a minimum,the two parties should take a group of testspecimens that are as homogeneous as possible and that arefrom a lot of material of the type in question.The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before the testing is begun.If a bias is found,either1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.13 on Wool and Felt.Current edition approved July 1,2013.Published August 2013.Originallyapproved in 1950.Last previous edition approved in 2008 as D111390a(2008).DOI:10.1520/D1113-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Tariff Schedules of the United States,Schedule 3,Part 1,Subpart C,Headnote1(c).Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 its cause must be found and corrected or the purchaser and thesupplier must agree to interpret future test results in light of theknown bias.6.Apparatus6.1 Filter,40-mesh sieve(U.S.Sieve Series,opening0.0165 in.(0.42 mm)or metal screen,or cheese cloth havingcomparable openings.6.2 OvenA forced-draft oven designed to supply clean airat a desired temperature with a tolerance of 6