- Zeitschriftendaten
- Format
- Zeitschrift
- eISSN
- 2719-9509
- Erstveröffentlichung
- 01 Jan 1992
- Erscheinungsweise
- 4 Hefte pro Jahr
- Sprachen
- Englisch
Suche
- Uneingeschränkter Zugang
Examination of the Gas-Vapour Phase of Tobacco Smoke. 1. Report: An Apparatus for the Absorption of Aerosoles, Vapours and Gases in Liquids / Zur Untersuchung der Gas-Dampf-Phase des Cigarettenrauches. 1. Mitteilung: Der Rotations-Abscheider, ein Gerät zur Absorption von Aerosolen, Dämpfen und Gasen in Flüssigkeiten
Seitenbereich: 91 - 93
Zusammenfassung
An apparatus for the absorption of tobacco smoke in liquids and particularly for the absorption of the gas-vapour phase of tobacco smoke is described. The depicted procedure enables the collection of representative mean samples for analytical purposes in one smoking process
- Uneingeschränkter Zugang
The Application of a Cadmium Reducer and a Diazotisation Reaction for the Determination of Nitrate and Nitrite in Tobacco / Über die Anwendung des Cadmium-Reduktors und der Diazotierung zur Bestimmung von Nitrat und Nitrit im Tabak
Seitenbereich: 95 - 100
Zusammenfassung
Nitrate is reduced by means of a cadmium reducer and spectrophotometrically determined in the form of nitrite by a diazotisation reaction. The results obtained by application of the described method to tobacco extracts correspond well to those resulting from the earlier described dimethylphenol procedure. Owing to its better sensitivity and specifity the reduction method is particularly suitable for the quantitative analysis of smallest amounts of nitrate. Quantities of 0.03 % of nitrate can be determined without difficulties. The inferior limit of detection is 0.001 %.
- Uneingeschränkter Zugang
A New Cold Trap for the Collection of Large Amounts of Tobacco Smoke Condensate / Eine neue Kältefalle zur Gewinnung grosser Mengen von Tabakrauchkondensat
Seitenbereich: 101 - 107
Zusammenfassung
The described ''cold'' trap has been developed for preparatory purposes and is designed for collecting and precipitating the smoke of 6000 cigarettes. The trap operates without filter material or added solvents. The precipitated smoke condensate itself acts as precipitating filter. By the new trap the precipitation of the smoke is thus performed much more tenderly than by all other hitherto known precipitation apparatusses. The quality of the "cold'' condensate does not differ from that of electrostatically produced condensate or from that of condensate obtained by a vibration frit. The reproducibility of the results obtained by means of the described preparatory ''cold'' trap is satisfactory. The mode of action of the trap is discussed.
- Uneingeschränkter Zugang
The Selective Effect of Cigarette Filters on the Nicotine and Phenol Retention in Different Tobacco Types / Über die selektive Wirkung von Cigarettenfiltern auf Nikotin und Phenole sowie ihre Abhängigkeit von der Tabaksorte
Seitenbereich: 109 - 127
Zusammenfassung
The dependence of the nicotine and phenol retention by filters made of cellulose and cellulose acetate upon the type of tobacco or tobacco mixture, upon the hydrogen ion concentration of the smoke, and upon tobacco additives which are apt to modify the reaction of the smoke is presented. The investigations centre in the circumstances under which nicotine can selectively be retained by a filter. Furthermore the distribution of nicotine and phenols within the filter is studied. It is shown that the coefficient of filtration of these substances is not constant but obviously diminishes with the length and predominantly in the first 10 mm of the fore-part of the filter
- Uneingeschränkter Zugang
The Isolation of Saturated Heterocyclic Bases from Tobacco Smoke / Isolierung von gesättigten heterocyclischen Basen aus dem Tabakrauch
Seitenbereich: 129 - 134
Zusammenfassung
The cyclic bases piperidine, pyrrolidine and 2-methyl-pyrrolidine were isolated and identified from the smoke of cigarettes with a high bases content
- Uneingeschränkter Zugang
Puff by Puff Smoking and Individual Puff Analyses / Über zugweises Abrauchen und Pro-Zug-Analysen
Seitenbereich: 135 - 150
Zusammenfassung
Our studies showed that the yield of total phenols per cigarette decreases by 55 % when there is an increase in moisture content. This fact is due to the growth of the filtration constant µphenols occurring when the tobacco moisture content rises. The determination of substances contained in the individual puffs revealed a steep increase in the yield of phenols with the puff number, which is caused by the decreasing length of the filtering tobacco rod, by the redistillation of the phenols absorbed in the tobacco rod, and by the increased formation of phenols during the repyrolysis of the condensate
- Uneingeschränkter Zugang
The Smoulder Stream of Cigarettes / Zur Kenntnis des Glimmstromes von Cigaretten
Seitenbereich: 151 - 156
Zusammenfassung
The phenomenon of the smoulder stream flowing through the cigarette during smouldering and during the puff intervals is demonstrated for the first time and its dependence upon physical conditions is examined. The volume of the smoulder stream can amount up to 180 ml per cigarette. Increasing draw resistance of the cigarette and augmenting moisture content of the tobacco as well as perforation of the cigarette paper have a decreasing effect on volume and velocity of the smoulder stream. The porosity of the cigarette paper has no perceptible influence. The spatial position of the cigarette affects volume and velocity of the smoulder stream. The influence exercised by the smoulder stream on the yields of total condensate, nicotine, phenols, aldehydes, and acroleine when the cigarette tip is open during the puff intervals is determined. When the moisture contents of the tobacco were extremely high, yield decreases reaching 50 % could be observed.