1、March 2017 English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 65.160!%bVp“2635177www.din.deDIN I
2、SO 20774Cigarettes Determination of carbon monoxide in sidestream smoke Method using a routine analytical linear smoking machine equipped with a fishtail chimney (ISO 20774:2013),English translation of DIN ISO 20774:2017-03Zigaretten Bestimmung des Kohlenstoffmonoxids im Nebenstromrauch Verfahren un
3、ter Verwendung einer linearen ZigarettenAbrauchmaschine fr Routineanalysen, ausgestattet mit einem FishtailAbzug (ISO 20774:2013),Englische bersetzung von DIN ISO 20774:2017-03Cigarettes Dtermination du monoxyde de carbone dans le courant secondaire de fume Mthode utilisant une machine fumer analyti
4、que de routine linaire quipe dune chemine individuelle en forme de queue de poisson (ISO 20774:2013),Traduction anglaise de DIN ISO 20774:2017-03www.beuth.deDocument comprises 27 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.
5、02.17 Contents PageIntroduction 51 Scope . 62 Normative references 63 Terms and definitions . 64 Principle 75 Apparatus . 76 Reagents . 106.1 Standard gas mixtures . 107 Sampling and preparation of cigarettes 117.1 General 117.2 Symbols 117.3 Preparation of the cigarettes for smoking 117.4 Selection
6、 of test portions of cigarettes 117.5 Marking the butt length 127.6 Conditioning . 137.7 Preliminary tests before smoking . 138 Preparation for the smoking run . 138.1 Smoking plan . 138.2 Preparation of mainstream and sidestream smoke traps and cigarette holders . 138.3 Setting up the smoking machi
7、ne 148.4 Assembly of fishtail chimney and sidestream smoke trap . 149 Procedure for smoking run and collection of sidestream smoke 159.1 Preparation of fishtail chimney . 159.2 Setting the fishtail chimney flow rate . 159.3 Connection of sidestream smoke filter pad holders 159.4 Record the atmospher
8、ic conditions . 159.5 Loading the cigarettes 159.6 Smoking the cigarettes 1510 Determination of carbon monoxide 1610.1 General principles . 1610.2 Calculation of CO yields using an off-line (bag collection) system 1610.3 Calculation of carbon monoxide on an on-line (continuous flow) data acquisition
9、 system 1711 Summary of other test sample calculations 1812 Test report 1912.1 General 1912.2 Characteristic data about the cigarette . 1912.3 Data about sampling .1912.4 Description of test .1912.5 Test results.1913 Repeatability and reproducibility .21Annex A (informative) Smoking plans .22Annex B
10、 (informative) Alternative procedure for CO calibration .26Bibliography .27National foreword 3 National Annex (informative) Bibliography 4 .A comma is used as the decimal marker.DIN ISO 20774:2017-03 2 National foreword This standard (ISO 20774:2013) has been prepared by Technical Committee ISO/TC 1
11、26 “Tobacco and tobacco products” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Lebensmittel und landwirtschaftliche Produkte (DIN Standards Committee Food and Agricultural Products), Working Committee NA 057-04-01 AA Tabak und Tabakerze
12、ugnisse. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document
13、are as follows: ISO 2971 DIN ISO 2971 ISO 3308 DIN ISO 3308 ISO 3402 DIN ISO 3402 ISO 4387 DIN ISO 4387 ISO 6488 DIN ISO 6488 ISO 6565 DIN ISO 6565 ISO 8243 DIN ISO 8243 ISO 8454 DIN ISO 8454 ISO 10315 DIN ISO 10315 ISO 10362-1 DIN ISO 10362-1 ISO 10362-2 DIN ISO 10362-2 DIN ISO 20774:2017-03 3 Nati
14、onal Annex NA (informative) Bibliography DIN ISO 2971, Cigarettes and filter rods Determination of nominal diameter Method using a laser beam measuring apparatus DIN ISO 3308, Routine analytical cigarette smoking machine Definitions and standard conditions DIN ISO 3402, Tobacco and tobacco products
15、Atmosphere for conditioning and testing DIN ISO 4387, Cigarettes Determination of total and nicotine-free dry particulate matter using a routine analytical smoking machine DIN ISO 6488, Tobacco and tobacco products Determination of water content Karl Fischer method DIN ISO 6565, Tobacco and tobacco
16、products Draw resistance of cigarettes and pressure drop of filter rods Standard conditions and measurement DIN ISO 8243, Cigarettes Sampling DIN ISO 8454, Cigarettes Determination of carbon monoxide in the vapour phase of cigarette smoke NDIR method DIN ISO 10315, Cigarettes Determination of nicoti
17、ne in smoke condensates Gas-chromatographic method DIN ISO 10362-1, Cigarettes Determination of water in smoke condensates Part 1: Gas-chromatographic method DIN ISO 10362-2, Cigarettes Determination of water in smoke condensates Part 2: Karl Fischer method DIN ISO 20774:2017-03 4 IntroductionCigare
18、ttes are manufactured to close tolerances using strict quality control procedures.However, the main constituents involved in the manufacture are derived from natural products (such as tobacco and paper) and this results in a final product which is intrinsically variable. Further complexity arises as
19、 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 ambient conditions (e.g. temperature, humidity, air movem
20、ent 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 from the cigarette during the smoking run other than fro
21、m the mouth end (which is called mainstream smoke).NOTE Side stream smoke 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 apply.
22、From the time that scientists have attempted to determine carbon monoxide yields in sidestream smoke, many different methods have been adopted. However, experience has shown some procedures to be more reliable and more amenable to handling of large numbers of samples. With these factors in mind, dur
23、ing the 19992002 period, collaborative studies by a task force composed of CORESTA (www.coresta.org) members have shown that improvements in repeatability and reproducibility result when some restrictions are placed upon the wide variety of methods and practices described in existing methods.This In
24、ternational Standard, produced after much collaborative experimentation by many laboratories in many countries, reflects the results of the optimization proposed and validated by the task force and provides one set of procedures that are the accepted reference procedures and for which repeatability
25、and reproducibility of the determinations were assessed. Experience in the task force has shown how strict adherence to the detailed set up and conditions of the method, as well as the degree of proficiency of the operator, affect the precision of the results.Further, it is preferable that the selec
26、ted method be compatible with different modes of cigarette equilibration or puffing parameters for the smoking of the tested pieces. The standards defined by ISO for the determination of mainstream smoke yields were, however, followed to the largest possible extent, although the machines used by the
27、 different laboratories were all of a linear type.This method is a machine method and it allows cigarettes to be smoked using a strictly controlled set of parameters. Thus it enables the sidestream smoke carbon monoxide yields from cigarettes, when smoked by this procedure, to be compared and ranked
28、. In the course of its studies, the task force demonstrated the value of comparing the analytical processes and their stability by use of the CORESTA monitor test piece for determining sidestream smoke CO yields.Since the determination of sidestream smoke CO yield is by nature more complex and delic
29、ate than its counterpart performed on mainstream smoke, it is highly recommended to include a monitor test piece in the smoking plans, as is done in mainstream smoke determinations. It is possible to use the CORESTA monitor or any other internally designed monitor test piece for this purpose. The us
30、e of an internationally recognized one is recommended.Cigarettes Determination of carbon monoxide in sidestream smoke Method using a routine analytical linear smoking machine equipped with a fishtail chimneyDIN ISO 20774:2017-03 5 WARNING The use of this International Standard can involve hazardous
31、materials, operations and equipment. This International Standard does not purport to address all the safety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of re
32、gulatory limitations prior to use.1 ScopeThis International Standard is applicable to the determination of carbon monoxide present in the sidestream smoke from cigarettes. The described method is specified using the ISO 3308 smoking parameters (puff volume, duration and frequency) and butt length, b
33、ut it is technically compatible with other smoking regimes.NOTE The method may not be directly adaptable to other sidestream smoke analytes. Nevertheless the determination of carbon dioxide was part of the validation study of ISO 20774 carried out by CORESTA. According to the number of reporting lab
34、oratories no rigorous statistical analysis of sidestream carbon dioxide data was carried out. Therefore only indicative information about conditions for the determination of CO2is provided.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document
35、 and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2971, Cigarettes and filter rods Determination of nominal diameter Method using a non-contact
36、 optical measuring apparatusISO 3308, Routine analytical cigarette-smoking machine Definitions and standard conditionsISO 3402, Tobacco and tobacco products Atmosphere for conditioning and testingISO 4387, Cigarettes Determination of total and nicotine-free dry particulate matter using a routine ana
37、lytical smoking machineISO 6488, Tobacco and tobacco products Determination of water content Karl Fischer methodISO 6565, Tobacco and tobacco products Draw resistance of cigarettes and pressure drop of filter rods Standard conditions and measurementISO 8454:2007, Cigarettes Determination of carbon m
38、onoxide in the vapour phase of cigarette smoke NDIR method3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1sidestream smoke vapour phaseportion of the sidestream smoke which passes through a Cambridge filter pad under the conditions specified in
39、the methodDIN ISO 20774:2017-03 6 3.2smoking processuse of a smoking machine to smoke cigarettes from lighting to final puff3.3smoking runspecific smoking process to produce such sidestream smoke from a sample of cigarettes as is necessary for the determination of the smoke components3.4laboratory s
40、amplesample intended for laboratory inspection or testing and which is representative of the gross sample or the sub-period sample3.5test samplecigarettes for test taken at random from the laboratory sample and which are representative of each of the increments making up the laboratory sample3.6cond
41、itioning samplecigarettes selected from the test sample for conditioning prior to tests for sidestream smoke CO yield3.7test portiongroup of cigarettes prepared for a single determination and which is a random sample from the test sample or conditioning sample, as appropriate3.8monitor test piecesam
42、ple produced for a specific test purpose, validated to fulfil requirements within specified tolerances and intended to be used for laboratory purposes only and labelled to clearly indicate that it is not for human useNote 1 to entry: A monitor test piece is a sample taken from a batch of cigarettes
43、that show the greatest homogeneity with regard to their physical, chemical and smoke yield characteristics.4 Principle Sampling of the test cigarettes. Conditioning of the test cigarettes. Smoking of the test cigarettes on a smoking machine in accordance with ISO 3308, with the exception of the spec
44、ifications on air velocity control, and equipped with a fishtail chimney and a filter pad (glass fibre filter pad) for sidestream smoke collection from each channel. Collection of sidestream smoke vapour phase and determination of its CO content.NOTE The determination of the CO content can be done e
45、ither by an on-line measurement or by off-line measurement. In the latter method, the vapour phase, or a proportion of it, is first collected in a gas bag.5 ApparatusUsual laboratory apparatus and in particular the following items.5.1 Fishtail chimney1), manufactured in glass, of design and dimensio
46、ns shown in Figure 1.1) Details of where to obtain fishtail chimneys are available from ISO/TC 126.DIN ISO 20774:2017-03 7 Dimensions in millimetresFigure 1 Fishtail chimney dimensions5.2 Routine analytical cigarette-smoking machine, modified to accept fishtail chimneys and complying with the requir
47、ements of ISO 3308 with the exception of the specifications on air velocity control. A plate shall be fixed underneath each channel, with a minimum length of 120 mm and a minimum width of 50 mm. This plate is positioned so as to cover the totality of the opening at the fishtail chimney bottom, as shown in Figure 2.DIN ISO 20774:2017-03 8 Key1 horizontal plate2 mainstream smoke trap and cigarette holder3 fishtail chimney4 location of calibration flow measureme
