ISO-20774-2007.pdf
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1、 Reference number ISO 20774:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 20774 First edition 2007-05-01 Cigarettes Determination of carbon monoxide in sidestream smoke Method using a routine analytical linear smoking machine equipped with a fishtail chimney Cigarettes Dtermination du monoxyde de carb
2、one dans le courant secondaire de fume Mthode utilisant une machine fumer analytique de routine linaire quipe dune chemine individuelle en forme de queue de poisson Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User
3、=Wing, Bernie Not for Resale, 05/16/2007 03:26:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 20774:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be e
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6、bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by a
7、ny means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail
8、 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 03:26:57 MDTNo reproduction or ne
9、tworking permitted without license from IHS -,-,- ISO 20774:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Principle. 2 5 Apparatus 3 6 Reagents 6 6.1 Standard gas mixtures. 6 7 Sampling and prepara
10、tion of cigarettes. 6 7.1 General. 6 7.2 Symbols. 6 7.3 Preparation of the cigarettes for smoking . 6 7.4 Selection of test portions of cigarettes 7 7.5 Marking the butt length 7 7.6 Selection of cigarettes 8 7.7 Conditioning 8 7.8 Preliminary tests before smoking. 8 8 Preparation for the smoking ru
11、n. 9 8.1 Smoking plan 9 8.2 Preparation of mainstream and sidestream smoke traps and cigarette holders. 9 8.3 Setting up the smoking machine 9 8.4 Assembly of fishtail chimney and sidestream trap. 9 9 Procedure for smoking run and collection of sidestream smoke . 10 9.1 Preparation of fishtail chimn
12、ey. 10 9.2 Setting the fishtail chimney flow rate. 10 9.3 Connection of sidestream glass-fibre pad holders. 10 9.4 Record the atmospheric conditions . 10 9.5 Loading the cigarettes 10 9.6 Smoking the cigarettes 11 10 Determination of carbon monoxide 11 10.1 General principles. 11 10.2 Calculation of
13、 carbon monoxide on an on-line (continuous flow) data acquisition system 12 10.3 Calculation of CO yields using an off-line (bag collection) system 13 11 Summary of other test sample calculations 13 12 Test report . 14 12.1 General. 14 12.2 Characteristic data about the cigarette 15 12.3 Data about
14、sampling. 15 12.4 Description of test 15 12.5 Test results 16 13 Repeatability and reproducibility 16 Annex A (informative) Smoking plans 18 Annex B (informative) Alternative procedure for CO calibration 22 Copyright International Organization for Standardization Provided by IHS under license with I
15、SO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 03:26:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 20774:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide fed
16、eration of national standards bodies (ISO member bodies). The work of preparing International Standards 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 comm
17、ittee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accorda
18、nce with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires
19、 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 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20774 was prepared by Technical C
20、ommittee ISO/TC 126, Tobacco and tobacco products. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 03:26:57 MDTNo reproduction or networking permitted without license from
21、IHS -,-,- ISO 20774:2007(E) ISO 2007 All rights reserved v Introduction Cigarettes are manufactured to close tolerances using strict quality control procedures. However, all the constituents involved in the manufacture are derived from natural products and this results in a final product which is in
22、trinsically variable. Further complexity arises as the cigarette is combusted during smoking to yield the cigarette smoke. The quantitative measurement of carbon monoxide is therefore dependent on the arbitrary definition of the means used to generate and collect the smoke. In particular, the ambien
23、t conditions (e.g. temperature, humidity, air movement within the laboratory) under which the test pieces are conditioned and smoke is collected, play a critical role in the accuracy of the measurement. Sidestream smoke in this International Standard is understood to be the smoke that is evolved fro
24、m the cigarette during the smoking run other than from the mouth end. NOTE This is distinguished from environmental tobacco smoke (ETS), which is a mixture of aged and diluted exhaled mainstream smoke and aged and diluted sidestream smoke, and for the assessment of which the present method does not
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