Abstract An examination of several samples of leaf tobacco, including three types of good-grade tobaccos and heavily molded flue-cured tobacco, and of cigarette smoke condensate, failed to detect aflatoxin B1. Pure aflatoxin B1 added to cigarettes was not recovered in the smoke condensate indicating that aflatoxin B1, when present, was changed or decomposed during the smoking process.
{"title":"Examination of Aflatoxin B1 in Leaf Tobacco and in Cigarette Smoke Condensate","authors":"T. Tso, T. Sorokin","doi":"10.2478/cttr-2013-0162","DOIUrl":"https://doi.org/10.2478/cttr-2013-0162","url":null,"abstract":"Abstract An examination of several samples of leaf tobacco, including three types of good-grade tobaccos and heavily molded flue-cured tobacco, and of cigarette smoke condensate, failed to detect aflatoxin B1. Pure aflatoxin B1 added to cigarettes was not recovered in the smoke condensate indicating that aflatoxin B1, when present, was changed or decomposed during the smoking process.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85353374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The author gives a survey of the publications which have been made up to now regarding the problem of pipe smoking by machines. The parameters which should be set up for the establishment of standard conditions for the smoking of pipes are discussed. The following conditions were found to be useful: puff frequency: 6 puffs per minute, puff volume: 40 ml, duration of puff: 1.5 sec., total number of puffs: 100 puffs per pipe. The reproducibility of this smoking process was found to be satisfactory. The smoking with undivided puffs led to the same results as the smoking with subdivided puffs (puff series). When the same tobacco was once smoked in the pipe and on the other hand as a cigarette, the composition of the mainstream smoke changed. The smoke condensate of the pipe contained more water and more benzo[a]pyrene than the condensate of the cigarette. A possible explanation of this finding is discussed.
{"title":"A Study on Pipe Smoking by Machines / Beitrag zum Problem des maschinellen Pfeifenabrauchens","authors":"H. Elmenhorst, L. Stadler","doi":"10.2478/cttr-2013-0163","DOIUrl":"https://doi.org/10.2478/cttr-2013-0163","url":null,"abstract":"Abstract The author gives a survey of the publications which have been made up to now regarding the problem of pipe smoking by machines. The parameters which should be set up for the establishment of standard conditions for the smoking of pipes are discussed. The following conditions were found to be useful: puff frequency: 6 puffs per minute, puff volume: 40 ml, duration of puff: 1.5 sec., total number of puffs: 100 puffs per pipe. The reproducibility of this smoking process was found to be satisfactory. The smoking with undivided puffs led to the same results as the smoking with subdivided puffs (puff series). When the same tobacco was once smoked in the pipe and on the other hand as a cigarette, the composition of the mainstream smoke changed. The smoke condensate of the pipe contained more water and more benzo[a]pyrene than the condensate of the cigarette. A possible explanation of this finding is discussed.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1967-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74644438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract A chromatographic procedure for the separation of smoke condensate or smoke condensate fractions into groups of unpolar or little polar, polar, and heavily polar components is described and is shown to offer a possibility of estimating the mode of action of fractionation mechanisms as well as of comparing different fractionation processes. Experiments carried out on defined substances were found to give some information about the adherence of individual classes of compounds to the said groups. The chromatographically obtained fractions were characterized through their infra-red spectra.
{"title":"A Contribution to the Analysis of Smoke Condensate and Smoke Condensate Fractions - Beitrag zur Analytik von Rauchkondensat und Kondensatfraktionen","authors":"H. Harke","doi":"10.2478/cttr-2013-0169","DOIUrl":"https://doi.org/10.2478/cttr-2013-0169","url":null,"abstract":"Abstract A chromatographic procedure for the separation of smoke condensate or smoke condensate fractions into groups of unpolar or little polar, polar, and heavily polar components is described and is shown to offer a possibility of estimating the mode of action of fractionation mechanisms as well as of comparing different fractionation processes. Experiments carried out on defined substances were found to give some information about the adherence of individual classes of compounds to the said groups. The chromatographically obtained fractions were characterized through their infra-red spectra.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76824401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Empirical experimental measurements show the relationship existing between pressure drop R and humidity F (referring to dry weight) of the cigarette to be as follows: with R1 (F1) and R2 (F2). In introducing this relation into the formula formerly given for calculating cigarette draw resistance, we find: The constant K of the measurements described was found to be between K=1.7 and K = 1.8. RG expresses the resistance to air flow of the burning cone, b denotes the specific resistance to air flow of the tobacco rod, a is the specific conductivity to air f¬low of the paper, l expresses the length of the porous paper wrapping of the cigarette, and R0 is the resistance to air flow of the dry cigarette. It turns out that cigarette draw resistance depends on cigarette humidity to such an extent that, in principle, pressure drop measurements should always be given in reference to the moisture content of the cigarette. In the experiments described by the present paper the following relation was found to be valid approximately:
{"title":"The Correlation Between Cigarette Pressure Drop and Moisture Content - Die Abhängigkeit des Zugwiderstandes von der Feuchtigkeit bei Cigaretten","authors":"K. Meyer-Abich, U. Heitmann","doi":"10.2478/cttr-2013-0167","DOIUrl":"https://doi.org/10.2478/cttr-2013-0167","url":null,"abstract":"Abstract Empirical experimental measurements show the relationship existing between pressure drop R and humidity F (referring to dry weight) of the cigarette to be as follows: with R1 (F1) and R2 (F2). In introducing this relation into the formula formerly given for calculating cigarette draw resistance, we find: The constant K of the measurements described was found to be between K=1.7 and K = 1.8. RG expresses the resistance to air flow of the burning cone, b denotes the specific resistance to air flow of the tobacco rod, a is the specific conductivity to air f¬low of the paper, l expresses the length of the porous paper wrapping of the cigarette, and R0 is the resistance to air flow of the dry cigarette. It turns out that cigarette draw resistance depends on cigarette humidity to such an extent that, in principle, pressure drop measurements should always be given in reference to the moisture content of the cigarette. In the experiments described by the present paper the following relation was found to be valid approximately:","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80817338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The capacity of the six isomeric dimethylphenols to act as reagent for the quantitative determination of nitrate is examined. Only 3,4-dimethylphenol proved to be suitable for the distillation method which was found to be most appropriate to tobacco. Chromatographic and spectrophotometric investigations showed that the resultant reaction products from tobacco extracts are identical with the nitro-dimethylphenols originating from pure nitrate. The determination of tobacco nitrate by the described method is reproducible with a coefficient of variation of about 0.9 to 1.3 per cent. The results obtained by different laboratories coincided satisfactorily. Quantities of 0.1 per cent of nitrate can be determined without difficulties. The nitrate content depends strongly on the respective variety of cured tobacco leaf and varies from 0 to 6 per cent. Dark tobaccos are particularly rich in nitrate. Nitrate is mainly found in the ribs of tobacco leaves and in the lower leaves of the tobacco plant. The maximum quantity of nitrite contained in tobacco amounts to 0.01 per cent.
{"title":"Determination of Nitrate and Nitrite Using Dimethylphenols as Reagents / Über die Anwendung der Dimethylphenole zur Bestimmung von Nitrat und Nitrit im Tabak","authors":"G. Lipp, U. Dölberg","doi":"10.2478/cttr-2013-0087","DOIUrl":"https://doi.org/10.2478/cttr-2013-0087","url":null,"abstract":"Abstract The capacity of the six isomeric dimethylphenols to act as reagent for the quantitative determination of nitrate is examined. Only 3,4-dimethylphenol proved to be suitable for the distillation method which was found to be most appropriate to tobacco. Chromatographic and spectrophotometric investigations showed that the resultant reaction products from tobacco extracts are identical with the nitro-dimethylphenols originating from pure nitrate. The determination of tobacco nitrate by the described method is reproducible with a coefficient of variation of about 0.9 to 1.3 per cent. The results obtained by different laboratories coincided satisfactorily. Quantities of 0.1 per cent of nitrate can be determined without difficulties. The nitrate content depends strongly on the respective variety of cured tobacco leaf and varies from 0 to 6 per cent. Dark tobaccos are particularly rich in nitrate. Nitrate is mainly found in the ribs of tobacco leaves and in the lower leaves of the tobacco plant. The maximum quantity of nitrite contained in tobacco amounts to 0.01 per cent.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90239306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Compared with other methods the nitrate determination by means of a photometric method using 3,4-dimethylphenol ("Maastricht") proved to be most suitable for tobacco. 134 varieties of raw tobacco were examined. Virginia tobaccos were found to be low in nitrate content. Generally they contain less than 0.1 % nitrate. Oriental tobaccos were found to contain between 0.2 and 0.4 % of nitrate, while the nitrate contents of Burley tobacco range from 1 to 5 %. Nitrates are enriched in the mid ribs of tobacco leaves. The formation of nitrogen oxides in tobacco smoke is probably due to the nitrate content of tobacco exclusively as is shown by a determination of nitrogen oxides in the smoke of a paper cigarette impregnated with ammonium oxalate. Possibilities are discussed for reducing the nitrate content of tobacco mixtures.
{"title":"Determination of the Nitrate Content in Tobacco / Untersuchungen über den Nitratgehalt des Tabaks","authors":"G. Neurath, H. Ehmke","doi":"10.2478/cttr-2013-0086","DOIUrl":"https://doi.org/10.2478/cttr-2013-0086","url":null,"abstract":"Abstract Compared with other methods the nitrate determination by means of a photometric method using 3,4-dimethylphenol (\"Maastricht\") proved to be most suitable for tobacco. 134 varieties of raw tobacco were examined. Virginia tobaccos were found to be low in nitrate content. Generally they contain less than 0.1 % nitrate. Oriental tobaccos were found to contain between 0.2 and 0.4 % of nitrate, while the nitrate contents of Burley tobacco range from 1 to 5 %. Nitrates are enriched in the mid ribs of tobacco leaves. The formation of nitrogen oxides in tobacco smoke is probably due to the nitrate content of tobacco exclusively as is shown by a determination of nitrogen oxides in the smoke of a paper cigarette impregnated with ammonium oxalate. Possibilities are discussed for reducing the nitrate content of tobacco mixtures.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77265580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Cigarette smoke condensate which had been obtained by special methods was examined by means of the analytical method that transforms N-nitroso compounds into 5-nitro-2-hydroxy-benzal-derivatives in order to ascertain whether the said group of substances is formed.
{"title":"Examination of N-Nitroso Compounds in Tobacco Smoke / Zur Frage der N-Nitrosoverbindungen im Tabakrauch","authors":"G. Neurath, B. Pirmann, H. Wichern","doi":"10.2478/cttr-2013-0084","DOIUrl":"https://doi.org/10.2478/cttr-2013-0084","url":null,"abstract":"Abstract Cigarette smoke condensate which had been obtained by special methods was examined by means of the analytical method that transforms N-nitroso compounds into 5-nitro-2-hydroxy-benzal-derivatives in order to ascertain whether the said group of substances is formed.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74052441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The measurement of nicotine solutions by means of an ultra-violet colorimeter prerequisites a special procedure because of the solutions being chemically changed during the measuring process already by the low pressure ultra-violet lamp situated beside the cell. The „Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch“ (prescriptions for the analysis of tobacco and tobacco smoke) being followed until the preparation of the solutions, the verification of the accuracy of the method can be limited to the control of the reproducibility of reading. The results obtained by the procedure in question are compared to those resulting from the silicotungstic method. The experiments indicate that the method is sufficiently accurate for the determination of nicotine in tobacco smoke condensates.
紫外比色仪测量尼古丁溶液需要一个特殊的程序，因为在测量过程中，溶液已经在放置在细胞旁边的低压紫外灯下发生化学变化。遵循“Einheitliche Vorschriften fr die analyze von Tabak und Tabakrauch”(用于分析烟草和烟草烟雾的处方)直到制备溶液，该方法的准确性验证可限于控制读数的可重复性。用该方法得到的结果与硅钨法得到的结果进行了比较。实验表明，该方法测定烟草烟雾凝聚物中尼古丁的准确度较高。
{"title":"Analysis of an Ultra-Violet Colourimeter Developed by B. Lange for the Measurement of Nicotine in Tobacco Smoke Condensate / Über die Eignung des UV-Kolorimeters nach B. Lange zur Bestimmung des Nikotins im Tabakrauchkondensat","authors":"R. Jodl","doi":"10.2478/cttr-2013-0082","DOIUrl":"https://doi.org/10.2478/cttr-2013-0082","url":null,"abstract":"Abstract The measurement of nicotine solutions by means of an ultra-violet colorimeter prerequisites a special procedure because of the solutions being chemically changed during the measuring process already by the low pressure ultra-violet lamp situated beside the cell. The „Einheitliche Vorschriften für die Analyse von Tabak und Tabakrauch“ (prescriptions for the analysis of tobacco and tobacco smoke) being followed until the preparation of the solutions, the verification of the accuracy of the method can be limited to the control of the reproducibility of reading. The results obtained by the procedure in question are compared to those resulting from the silicotungstic method. The experiments indicate that the method is sufficiently accurate for the determination of nicotine in tobacco smoke condensates.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85084781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Asmus et al. have published an analytical procedure for the quantitative separate determination of nicotine and pyridine in tobacco smoke. Their method has been slightly modified in order to adapt it to the standard procedure of smoke alkaloid analysis. The modified method allows the accurate determination of the nicotine alkaloids and the pyridines; the latter can be assayed with a precision of ± 0.7 µg per cigarette, for a total of 21 µg pyridine per cigarette (95 % confidence limits). Preliminary results using this method indicate that the mainstream smoke of one cigarette contains between about 20 (sun-cured and flue-cured tobaccos) and 50 (air-cured tobaccos) µg of pyridine. The stub of a straight cigarette shows a marked retention efficiency for smoke pyridine; still better retention is observed through a cigarette filter from cellulose acetate, whereas filters on a paper or cellulose basis are less efficient. It is usual to separate the pyridines from the other smoke bases by steam distillation in presence of acetic acid or a buffer solution. It is shown that this procedure is inefficient. The simple pyridines contributing rarely more than 2 percent to the mass of the total smoke bases, there seems to be no real necessity of determining their amount in the course of a routine determination of the smoke alkaloids.
{"title":"The Determination of Pyridin in Tobacco Smoke during a Routine Determination of Smoke Alkaloids / Zur Bestimmung des Pyridins im Rauch von Cigaretten im Rahmen der Bestimmung der Gesamtalkaloide","authors":"P. Waltz, M. Häusermann, F. Moser","doi":"10.2478/cttr-2013-0081","DOIUrl":"https://doi.org/10.2478/cttr-2013-0081","url":null,"abstract":"Abstract Asmus et al. have published an analytical procedure for the quantitative separate determination of nicotine and pyridine in tobacco smoke. Their method has been slightly modified in order to adapt it to the standard procedure of smoke alkaloid analysis. The modified method allows the accurate determination of the nicotine alkaloids and the pyridines; the latter can be assayed with a precision of ± 0.7 µg per cigarette, for a total of 21 µg pyridine per cigarette (95 % confidence limits). Preliminary results using this method indicate that the mainstream smoke of one cigarette contains between about 20 (sun-cured and flue-cured tobaccos) and 50 (air-cured tobaccos) µg of pyridine. The stub of a straight cigarette shows a marked retention efficiency for smoke pyridine; still better retention is observed through a cigarette filter from cellulose acetate, whereas filters on a paper or cellulose basis are less efficient. It is usual to separate the pyridines from the other smoke bases by steam distillation in presence of acetic acid or a buffer solution. It is shown that this procedure is inefficient. The simple pyridines contributing rarely more than 2 percent to the mass of the total smoke bases, there seems to be no real necessity of determining their amount in the course of a routine determination of the smoke alkaloids.","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86024083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Three experiments are described to learn, if there is any redistillation effect or not. These experiments established that this is true. Then a short introduction is given of adsorption laws with regard to tobacco aerosol sucked through a filter, i. e. through tobacco in the butt. In the following the smoking process is investigated. Beginning we assume for simplicity the case of no redistillation (R = 0): •mI denotes the aerosol mass precipitated on the tobacco in the butt and which is destroyed by the advancing smouldering zone in section I, i. e. in the ash. •mII denotes the aerosol mass precipitated in section II, i. e. in the butt. •mIII denotes the aerosol mass leaving the cigarette. Tobacco aerosol distribution in section I and II and mass of mIII are given as a function of the smouldering zone's progress. The tables are calculated using the adsorption constant k = 0.0689, this being found for a particular brand of cigarette by experiment. Then we investigate the other extreme, i. e. the total redistillation (R = 1). An additional mass of volatile tobacco aerosol is generated in the smouldering zone, not through combustion of the tobacco but through redistillation of the precipitated aerosol. Results are obtained by integration and also by an algebraic method using a calculating machine. Finally further tables are given for partial redistillation effect (R = 0.25; 0.50; 0.75). The experimental part demonstrates that for the special cigarette brand investigated it is found R = 0.45 for tobacco aerosol and R = 0.72 for phenols. R = 0.45 means: The aerosol precipitated during smoking on the butt's tobacco by the advancing smouldering zone is partly destroyed (55 %) and partly redistilled (45 %).
{"title":"Smoking and Redistillation Effect in Theory and Experiments / Verrauchung und Redestillation in Theorie und Versuchen","authors":"A. Dobrowsky","doi":"10.2478/cttr-2013-0078","DOIUrl":"https://doi.org/10.2478/cttr-2013-0078","url":null,"abstract":"Abstract Three experiments are described to learn, if there is any redistillation effect or not. These experiments established that this is true. Then a short introduction is given of adsorption laws with regard to tobacco aerosol sucked through a filter, i. e. through tobacco in the butt. In the following the smoking process is investigated. Beginning we assume for simplicity the case of no redistillation (R = 0): •mI denotes the aerosol mass precipitated on the tobacco in the butt and which is destroyed by the advancing smouldering zone in section I, i. e. in the ash. •mII denotes the aerosol mass precipitated in section II, i. e. in the butt. •mIII denotes the aerosol mass leaving the cigarette. Tobacco aerosol distribution in section I and II and mass of mIII are given as a function of the smouldering zone's progress. The tables are calculated using the adsorption constant k = 0.0689, this being found for a particular brand of cigarette by experiment. Then we investigate the other extreme, i. e. the total redistillation (R = 1). An additional mass of volatile tobacco aerosol is generated in the smouldering zone, not through combustion of the tobacco but through redistillation of the precipitated aerosol. Results are obtained by integration and also by an algebraic method using a calculating machine. Finally further tables are given for partial redistillation effect (R = 0.25; 0.50; 0.75). The experimental part demonstrates that for the special cigarette brand investigated it is found R = 0.45 for tobacco aerosol and R = 0.72 for phenols. R = 0.45 means: The aerosol precipitated during smoking on the butt's tobacco by the advancing smouldering zone is partly destroyed (55 %) and partly redistilled (45 %).","PeriodicalId":35431,"journal":{"name":"Beitrage zur Tabakforschung International/ Contributions to Tobacco Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72518411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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