BS-5743-1991 ISO-3402-1991.pdf
《BS-5743-1991 ISO-3402-1991.pdf》由会员分享,可在线阅读,更多相关《BS-5743-1991 ISO-3402-1991.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 5743:1991 ISO 3402:1991 Specification for Atmosphere for conditioning and testing tobacco and tobacco products Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:36:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5743:1991 This British Standard, having been prepared under
2、 the direction of the Agriculture and Food Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 29 November 1991 BSI 12-1999 First published December 1979 Second edition November 1991 The following BSI references relate to the work on this sta
3、ndard: Committee reference AFC/11 Draft for comment 90/52187 DC ISBN 0 580 20281 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agriculture and Food Standards Policy Committee (AFC/-) to Technical Committee AFC/11, upon which the foll
4、owing bodies were represented: Department of Trade and Industry (Laboratory of the Government Chemist) Tobacco Advisory Council Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:36:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5743:
5、1991 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative reference1 3Definitions1 4Atmosphere1 5Conditioning2 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:36:30 GMT+00:00 200
6、6, Uncontrolled Copy, (c) BSI BS 5743:1991 ii BSI 12-1999 National foreword This revision of BS 5743 has been prepared under the direction of the Agriculture and Food Standards Policy Committee. It is identical with ISO 3402:1991 “Tobacco and tobacco products Atmosphere for conditioning and testing”
7、, published by the International Organization for Standardization (ISO), and in the preparation of which the United Kingdom played a full part. This revision supersedes BS 5743:1979 which is withdrawn and from which it differs in that only one atmosphere is specified. Cross-references The Technical
8、Committee has reviewed the provisions of ISO 558:1980, to which reference is made in the text, and has decided that they are suitable for use in conjunction with this standard. It is intended that ISO 187, referred to in clause 1 for information only, be implemented as a dual-numbered revision of BS
9、 3431:1973 “Method for the conditioning of paper and board for testing”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer i
10、mmunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in
11、 the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:36:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5743:1991 BSI 12-19991 Introduction During 1988 and 1989, collaborative studies by task forces composed of members of the Cooperation Centre f
12、or Scientific Research Relative to Tobacco (CORESTA), “Smoke” and “Technology” groups, have been made on the repeatability and reproducibility of tests on tobacco and tobacco products. In order to ensure comparability between test results from different laboratories it has been proved necessary to s
13、pecify a single atmosphere for conditioning and testing rather than allowing the use of one of the three possibilities provided for in the two previous editions of this International Standard. It has also been found that, in practice, the previous tolerances on relative humidity for the test atmosph
14、ere were difficult to achieve. These studies have resulted in the publication of CORESTA recommended method No. 21. 1 Scope This International Standard specifies the atmosphere for conditioning and testing samples and test pieces of tobacco and tobacco products. It is applicable to tests on tobacco,
15、 tobacco products and materials used in the manufacture of tobacco products for which prior conditioning is necessary. It is not applicable in the case of test methods for which particular test conditions are laid down elsewhere, for example, cigarette papers and board, which are given in ISO 187. 2
16、 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this Int
17、ernational Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 558:1980, Conditioning and testing Standard atmosphere Definitions. 3 Defin
18、itions For the purposes of this International Standard, the following definitions given in ISO 558 apply. 3.1 atmosphere ambient conditions defined by one or more of the following parameters: Temperature Relative humidity Pressure 3.2 conditioning atmosphere the atmosphere in which a sample or test
19、piece is kept before being subjected to test. It is characterized by specified values for one or more of the following parameters: temperature, relative humidity, and pressure, which are kept within the prescribed tolerances for a given period of time NOTE 1The term “conditioning” refers to the oper
20、ation as a whole designed to bring a sample or test piece, before testing, into a specified condition in relation to temperature and humidity, by keeping it for a given period of time in the conditioning atmosphere. NOTE 2The conditioning can be done either in the laboratory or in a special enclosur
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS-5743-1991 ISO-3402-1991 BS 5743 1991 ISO 3402
链接地址:https://www.31doc.com/p-3772231.html