ISO INTERNATIONAL STANDARD 4388 Second edition ANsi Internat Doc Sec 1991-12-15 Cigarettes ---. Determination of the smoke condensate retention index of a filter -- Direct spectrometric method Cigarettes --- Determination de I'indice de retention du condensat de fumee d'un fitre -- Methode spectrometrique directe Reference number 1SO4388:1991(E) ISO 4388:1991(E) Foreword 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. 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, govern- mental and non-governmental, in liaison with soO, aiso take part in the work. so collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- bodies casting a vote. International Standard Iso 4388 was prepared by Technical Committee IsO/TC 126, Tobacco and tobacco products. cancels and the first edition This second edition replaces (iso 4388:1977), of which it constitutes a technical revision. C 1SO 1991 or by any means, electronic or mechanicai, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56.CH-1211Genéve 20·Switzeriand Printed in Switzerland Copyright International Organization for Standardization ISO 4388:1991(E) INTERNATIONAL STANDARD Cigarettes -- Determination of the smoke condensate retention index of a filter - Direct spectrometric method Scope 3 Definition 1 This International Standard specifies a direct spec- For the purposes of this International Standard, the trometric method for the determination at 450 nm of following definition applies. the smoke condensate retention index of a cigarette 3.1 smoke condensate retention index (Rc) of a filter. cigarette filter: The ratio, expressed as a percentage The method is applicable to filter cigarettes. It is not by mass, of the crude smoke condensate retained applicable to cigarettes with coloured filters or to by the filter to that entering the filter (see figure 1): cigarettes with filters containing special additives, Fc Fc for example alkaline additives or absorbents such Rc = × 100 = × 100 Sc F+ H. as active charcoal. where This empirical, quick and practical method relates only to smoke condensate. The results should not Fc is the mass of crude smoke condensate be interpreted with respect to any particular con- retained by the filter; stituent of the smoke condensate. Sc is the mass of crude smoke condensate entering the filter; Hc is the mass of crude smoke condensate 2 Normative references in the main-stream smoke. The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- Sc cation, the editions indicated were valid. All stan- dards are subject to revision, and parties to agreements based on this International Standard Figure 1 are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- dicated below. Members of IEC and ISO maintain registers of currently valid International Standards. Principle 4 Is0 3308:1991, Routine analytical cigarette-smoking machine -- Definitions and standard conditions. Smoking of filter cigarettes in accordance with ISO 4387. Dissolution in methanol of the crude Iso 3402:1991, Tobacco and tobacco products -- At- smoke condensate from the main-stream smoke. mosphere for conditioning and testing. Removat of the filter material from the remaining tobacco butts; dissolution in methanol of the crude IsO 4387:1991,