Beitrage zur Tabakforschung International/ Contributions to Tobacco Research最新文献_第8页

A Contribution to the Analysis of Smoke Condensate and Smoke Condensate Fractions - Beitrag zur Analytik von Rauchkondensat und Kondensatfraktionen 对烟凝结水和烟凝结水馏分分析的贡献

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1967-01-01 DOI: 10.2478/cttr-2013-0169

H. Harke

引用次数: 0

The Correlation Between Cigarette Pressure Drop and Moisture Content - Die Abhängigkeit des Zugwiderstandes von der Feuchtigkeit bei Cigaretten 花枝交融的关系就建立在这一点上

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1967-01-01 DOI: 10.2478/cttr-2013-0167

K. Meyer-Abich, U. Heitmann

引用次数: 0

Determination of Nitrate and Nitrite Using Dimethylphenols as Reagents / Über die Anwendung der Dimethylphenole zur Bestimmung von Nitrat und Nitrit im Tabak 通过使用二甲硝基苯酚(硝酸盐)来确定硝酸和硝酸在烟草中所使用的硝酸盐

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-11-01 DOI: 10.2478/cttr-2013-0087

G. Lipp, U. Dölberg

{"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":"26 1","pages":"345 - 359"},"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}

引用次数: 1

Determination of the Nitrate Content in Tobacco / Untersuchungen über den Nitratgehalt des Tabaks 烟草中硝酸盐含量的测定/ Untersuchungen <e:1> ber den Nitratgehalt des Tabaks

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-11-01 DOI: 10.2478/cttr-2013-0086

G. Neurath, H. Ehmke

引用次数: 3

Examination of N-Nitroso Compounds in Tobacco Smoke / Zur Frage der N-Nitrosoverbindungen im Tabakrauch 烟草烟气中n -亚硝基化合物的测定及烟叶中n -亚硝基化合物的测定

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-11-01 DOI: 10.2478/cttr-2013-0084

G. Neurath, B. Pirmann, H. Wichern

引用次数: 7

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 开发出一种紫外线颜色开发:针对烟草烟尘的《Nicotine》及其与b相关的后续措施

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-10-01 DOI: 10.2478/cttr-2013-0082

R. Jodl

引用次数: 0

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 烟草烟雾一直都是由冠状动脉中有名的冠状菌所主导

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-10-01 DOI: 10.2478/cttr-2013-0081

P. Waltz, M. Häusermann, F. Moser

{"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":"54 1","pages":"282 - 293"},"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}

引用次数: 1

Smoking and Redistillation Effect in Theory and Experiments / Verrauchung und Redestillation in Theorie und Versuchen 理论与实验中的烟熏与再蒸馏效应/理论与再蒸馏

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-10-01 DOI: 10.2478/cttr-2013-0078

A. Dobrowsky

{"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":"28 1","pages":"237 - 262"},"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}

引用次数: 0

The Capillary Press, a Smoking Machine for the Collection of Native Smoke Condensate: 1st Report / Die Kapillarpresse, eine Rauchmaschine zur Gewinnung von nativem Rauchkondensat: 1. Mitteilung 摩很小的烟雾出版社:第37篇/全煤机:利用蒸汽冷凝器生产的烟雾机器:1号。说明

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-10-01 DOI: 10.2478/CTTR-2013-0083

F. Seehofer, D. Hanssen

引用次数: 2

The Influence of Air Permeability of Cigarette Paper on the Yield of Condensate and its Composition / Einfluss der Luftdurchlässigkeit von Cigarettenpapier auf die Ausbeute und Zusammensetzung des Rauches 西加力纸业在储藏室的空气透明度问题

Beitrage zur Tabakforschung International/ Contributions to Tobacco Research Pub Date : 1964-10-01 DOI: 10.2478/cttr-2013-0080

K. Müller, G. Neurath, H. Horstmann

引用次数: 4