BS ISO 3074-2014 Wool Determination of dichloromethane-soluble matter in combed sliver《羊毛 在精梳条子中二氯甲烷可溶物的测定》.pdf

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1、BSI Standards PublicationBS ISO 3074:2014Wool Determination ofdichloromethane-solublematter in combed sliverBS ISO 3074:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 3074:2014.The UK participation in its preparation was entrusted to TechnicalCommittee TC

2、I/24, Physical testing of textiles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institut

3、ion 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 79902 0ICS 59.080.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2014.Amendments issued s

4、ince publicationDate Text affectedBS ISO 3074:2014 ISO 2014Wool Determination of dichloromethane-soluble matter in combed sliverLaine Mthode de dtermination de lextrait dichloromthanique dans un ruban de laine peigneINTERNATIONAL STANDARDISO3074Second edition2014-09-01Reference numberISO 3074:2014(E

5、)BS ISO 3074:2014ISO 3074:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or

6、posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyri

7、ghtiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 3074:2014ISO 3074:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Reagents 16 Apparatus . 27 Conditioning and testing atmosphere 28 Sampl

8、ing 29 Procedure. 210 Expression of the results 311 Test report . 3Bibliography 4BS ISO 3074:2014ISO 3074:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards

9、is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take pa

10、rt in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particu

11、lar the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this

12、 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.i

13、so.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the W

14、TO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns.This second edition cancels and replaces the first edition (ISO 3074:1975), which

15、 has been technically revised.This second edition to ISO 3074 is based on the test method IWTO-10-03, drawn up by the International Wool Textile Organization (IWTO).iv ISO 2014 All rights reservedBS ISO 3074:2014ISO 3074:2014(E)IntroductionWool textiles can contain solvent-extractable oils and fats.

16、 These are derived mainly from:a) the wool grease occurring naturally in raw wool;b) oils added to assist textile processing;c) detergents picked up during washing and scouring processes;d) special finishing agents.The amount of these substances present depends on the stage of manufacture and its es

17、timation is important for determining the clean wool content of a sample.These different materials cannot be estimated individually by solvent extraction methods, since there are no known solvents that are specific for each component. Hence, it is only possible to determine the amount of these subst

18、ances extracted by a given solvent under specified conditions, any additional information being obtained by detailed analysis of the extracted material. Dichloromethane is recognized as a suitable solvent for extracting oils and fats.The method described in this International Standard is based on th

19、e results of inter-laboratory trials organized by the Technical Committee of the International Wool Textile Organization (IWTO). ISO 2014 All rights reserved vBS ISO 3074:2014BS ISO 3074:2014Wool Determination of dichloromethane-soluble matter in combed sliver1 ScopeThis International Standard speci

20、fies a method for determining the dichloromethane-soluble matter in combed wool sliver. Its use can be extended to wool in other forms.It should be recognized that extraction with dichloromethane under the prescribed conditions does not completely remove all the fatty material present in a sample of

21、 wool. A further amount, possibly material of similar character, will usually be extracted by the use of solvents that cause greater swelling of the wool fibres.The method is applicable only to 100 % wool products. It can give misleading results if applied to products in which fibres other than wool

22、 are present.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includi

23、ng any amendments) applies.ISO 139, Textiles Standard atmospheres for conditioning and testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1dichloromethane-soluble extractmaterial extracted from wool by dichloromethane under prescribed conditi

24、ons4 PrincipleOnce the appropriate specimen has been selected, it is then extracted in a Soxhlet extraction apparatus, using dichloromethane as the extraction solvent. The solvent is evaporated and both the residue and the extracted wool sample are oven-dried and weighed after cooling. The extractab

25、le matter is calculated by expressing the oven-dry mass of the residue as a percentage of the oven-dry mass of the extracted test specimen.5 Reagents5.1 Dichloromethane (methylene chloride), boiling range 39 C to 41 C.When 100 ml of the solvent is evaporated, the residue shall not exceed 1 mg.WARNIN

26、G Dichloromethane is toxic, the room in which extractions are made shall be adequately ventilated.5.2 Acetone, analytical reagent quality.INTERNATIONAL STANDARD ISO 3074:2014(E) ISO 2014 All rights reserved 1BS ISO 3074:2014ISO 3074:2014(E)6 Apparatus6.1 Soxhlet extraction apparatus, assembled with

27、ground glass joints and protected against the entry of moisture. The extractor (barrel) of the Soxhlet shall conveniently have a capacity of about 200 ml to 300 ml and the flask 250 ml.6.2 Water-bath or other suitable means of low temperature heating.6.3 Balance, with an accuracy of 0,01 g, preferab

28、ly with large scale-pan.6.4 Analytical balance, accurate to 0,000 1 g.6.5 Desiccator.6.6 Drying oven, capable of being controlled at a temperature of 105 C 3 C.6.7 Distillation unit.6.8 Fat-free filter papers.7 Conditioning and testing atmospherePre-conditioning, conditioning, and testing shall be c

29、arried out in the standard atmosphere specified in ISO 139.8 SamplingThe laboratory sample shall be representative of the bulk of material and shall be sufficient to provide two test specimens each of mass approximately 10 g.Useful information on sampling is given in ISO 1130.9 Procedure9.1 Precondi

30、tion the laboratory sample as specified in ISO l39, and then bring it to constant mass by exposing it for not less than 24 h in the standard atmosphere for testing (see Clause 7).9.2 In the standard atmosphere for testing, prepare two test specimens each of mass 10 g 0,5 g use large scale-pan (6.3).

31、 For each duplicate test, introduce the test specimen into the Soxhlet barrel in such a way that the extract will not carry wool fibres into the siphon tube and that the level of the top of the test specimen is below that of the end of the siphon tube. A particle-free extract may be secured by one o

32、f the following methods:a) Insert a glass wool plug at the bottom of the Soxhlet barrel, effectively covering the exit tube.b) Pack the test specimen into a Soxhlet thimble covering with a loose plug of dichloromethane-extracted cotton wool.c) Enclose the test specimen in fat-free filter paper (6.8)

33、.If a water-bath (6.2) is used, heat it to approximately 45 C. Assemble the flask and Soxhlet barrel. Pour into the barrel sufficient dichloromethane (5.1) to cause a first siphoning, together with a small excess. Complete the assembly of the condenser, Soxhlet barrel, flask, and heating device. Che

34、ck that all joints are tight. Adjust the heating so that satisfactory siphoning occurs at the rate of not less than 6 cycles per 2 ISO 2014 All rights reservedBS ISO 3074:2014ISO 3074:2014(E)hour. Allow 20 to 24 siphonings, adding more dichloromethane if desired. Reject any test in which the siphoni

35、ng does not function correctly.9.3 Remove the Soxhlet apparatus (6.1) from the heat source. Remove the extracted test specimen from the barrel; allow it to air-dry in a fume cupboard.9.4 Carefully boil off the dichloromethane by placing the extraction flask on the distillation unit (6.7). If droplet

36、s of water are present in the flask, add 2 ml to 5 ml of acetone (5.2) and heat on the water-bath (6.2), repeating the process if necessary until no water is visible.9.5 Heat the extraction flask and the extracted test specimen in a ventilated oven (6.6) for 120 min at 105 C 3 C, then move them into

37、 a desiccator (6.5), cool for 30 min, then weigh on a balance (6.4) reading to 0,000 1 g and determine the oven-dry mass of the residue and the extracted test specimen.10 Expression of the results10.1 For each individual test specimen, calculate the percentage of extractable matter (residue) using t

38、he following formula:Cmm=12100 whereC is the percentage of dichloromethane-soluble extract (residue), in %;m1is the oven-dry mass of the dichloromethane-soluble extract, in grams;m2is the oven-dry mass of the extracted specimen, in grams.10.2 Calculate the mean of the individual determinations and r

39、eport to the nearest 0,1 %.11 Test reportThe test report shall include the following information:a) reference to this International Standard, i.e. ISO 3074;b) the individual results and their mean;c) the volume of the Soxhlet extractor. ISO 2014 All rights reserved 3BS ISO 3074:2014ISO 3074:2014(E)B

40、ibliography1 ISO 1130, Textile fibres Some methods of sampling for testing2 IWTO-10-03, Method for the determination of the dichloromethane soluble matter in combed wool and commercially scoured or carbonised wool3 FZ/T 20018-2010, Wool Determination of dichloromethane-soluble matter in textiles (Ch

41、inese Industrial Standard)4 ISO 2014 All rights reservedBS ISO 3074:2014BS ISO 3074:2014ISO 3074:2014(E) ISO 2014 All rights reservedICS 59.080.01Price based on 4 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related pu

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