SANS 904-2010 Leather - Chemical tests - Preparation of chemical test samples《皮革 化学测试 化学试验样品的制备》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

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3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22259-8 SANS 904:2010Edition 1ISO 4044:2008Edition 2SOUTH AFRICAN NATIONAL STANDARD Leather Chemical tests Preparation of chemical test sa

4、mples This national standard is the identical implementation of ISO 4044:2008 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344

5、 1568 www.sabs.co.za SABS SANS 904:2010 Edition 1 ISO 4044:2008 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 120B, Leather Leather test methods, in accordance with procedures of the SABS Standards Division,

6、in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in January 2010. Reference numberISO 4044:2008(E)IULTCS/IUC 3:2008(E)ISO 2008INTERNATIONAL STANDARD ISO4044IULTCS/IUC3Second edition2008-02-15Leather Chemical tests Preparation of chemical test samples Cuir Essais

7、chimiques Prparation des chantillons pour essais chimiques SANS 904:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4044:2008(E) IULTCS/IUC 3:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adob

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12、e 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedSANS 904:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4044:2008(E)

13、IULTCS/IUC 3:2008(E) ISO 2008 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. E

14、ach 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 part in the work. ISO collaborates closely with the Internati

15、onal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standa

16、rds adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject

17、 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4044/IUC 3 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, in collaboration with the Chemical Tests Commission of the International Union

18、of Leather Technologists and Chemists Societies (IUC Commission, IULTCS), in accordance with the Agreement on technical co-operation between ISO and CEN (Vienna Agreement). It is based on IUC 3 originally published in J. Soc. Leather Trades Chemists, 49, pp. 8-10, 1965, and declared an official meth

19、od of the IULTCS in 1965. IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for sampling and the te

20、sting of leather. ISO recognizes IULTCS as an international standardizing body for the preparation of test methods for leather. This second edition cancels and replaces the first edition (ISO 4044:1977), which has been technically revised. SANS 904:2010This s tandard may only be used and printed by

21、approved subscription and freemailing clients of the SABS .SANS 904:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 4044:2008(E)IULTCS/IUC 3:2008(E) ISO 2008 All rights reserved 1Leather Chemical tests Preparati

22、on of chemical test samples 1 Scope This International Standard specifies a method for the preparation of a test sample of leather for chemical analysis. This method is applicable to all types of leather. 2 Normative references The following referenced documents are indispensable for the application

23、 of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning 3 Principle Leather is ground in a cu

24、tter mill to form “ground leather” or “leather powder”. 4 Apparatus 4.1 Cutter mill, having a blade rotational frequency of 700 to 1 000 revolutions per minute and a perforated sieving plate with 4 mm ( 0,5 mm) diameter perforations. The mill blades shall be sharp. 5 Preparation of the test sample B

25、efore grinding, the samples of leather should be reduced to small pieces. The precise size of the small pieces is not detailed here as they will be defined by the design of the cutter mill feed system. Ensure that the cutter mill and sample collecting device are clean. Water should not be used for c

26、leaning. If sufficient sample is available, then a few small pieces of test leather should be ground and discarded, with the apparatus being cleaned again before proceeding with grinding the main test sample. Test pieces that are wet (in excess of 30 % moisture) should be pre-dried at a temperature

27、not exceeding 50 C. The drying temperature should be selected with consideration of the influence of elevated temperature on the nature of the analyte. If the samples are dried at elevated temperature, they shall be conditioned according to ISO 2419. SANS 904:2010This s tandard may only be used and

28、printed by approved subscription and freemailing clients of the SABS .ISO 4044:2008(E) IULTCS/IUC 3:2008(E) 2 ISO 2008 All rights reserved6 Storage of the test sample The ground test sample shall be mixed thoroughly and placed in a clean, dry, airtight container. The container shall be kept away fro

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