Tobacco samples, with KNO 3, K 3C 6H 5O 7, K 2C 2O 4, or K 2C 4H 4O 6 as catalyst by using isovolumetric impregnation, were characterized by DTA (differential thermal analysis) and TPR MS (temperature programmed reaction mass spectrometry on line analysis) techniques, and the CO content in mainstream smoke was evaluated by GC (gas chromatography).
87 components between mainstream and sidestream smoke were isolated and identified, 38 of them were quantitatively determined by GC with the internal standard method, and the distribution ratios of the 38 components in sidestream and mainstream smoke were determined.
7) the HCN deliveries of 50 brands ranged from 26 to 147μg/cig,the average HCN deliveries of Virginia type and blended type cigarettes were 93.8 and 63.6μg/cig,respectively.
Results The contents of nitrogen oxides in tobacco smoke main stream decreased with the increases of the contents of porphyrin and ferripor-phyrin added into the cigarette filters (porphyrin: r= -0.9943, P<0.01; ferriporphyrin: r= -0.9892 P< 0.01).
The result showed that adding 1.0 mL chitosan (soluted in 2% acetum,D D=90%)in the cigarette,the content of tar in main smoking reduced by 15.5%,that of nicotine,reduced by 13.8%,the inherent quality of cigarette was improved obviously.
This study compared the effects of mainstream smoke from Quest, Eclipse, and 2R4F reference cigarettes on the development of atherosclerosis in apolipoprotein E-deficient (apoE -/-) mice.
Soft single-photon ionisation (SPI)-time-of-flight mass spectrometry (TOFMS) has been used to investigate the effect of different cigarette-lighting devices on the chemical composition of the mainstream smoke from the first cigarette puff.
Acetate filters had little effect on cell mortality, and the age-of-smoke effect was not evident for MS smoke generated with a low puff volume and rapid dilution.
The direct carcinogenic effects of sidestream (SS) and mainstream (MS) smoke condensates of a filtered commercial brand of blond cigarettes were compared using a lifetime mouse skin tumorigenicity assay on female NMRI mice.
Each cigarette was smoked by a smoking machine under the standard conditions, and the separately collected SS and MS smoke condensates were extracted with acetone/methanol as described elsewhere.
Particle sizes for the carcinogen Benzo(a)pyrene (BaP) in SS smoke, and total particulate matter (UVPM) in SS and MS smoke were measured and used to compare the simulation to experimental data.
A simple and accurate method, gas chromatography (GC) with flame-ionization detection (FID) has been used for determination of the four main nicotine-related alkaloids in tobacco.
The main-stream and sidestream smoking gas on a cigarette-smoking me, chine wore collected,and the harmful substances such as tar, nicotine alka- loid, Pb-210 and Po-210 were analysed. These co- ntents inhaled by pc. sslve smokers were compered with those of smokers. In middle smoking conditi- on, the ratio value between them is about 1/7 to 1/ 8. When population congregated and the more smokers in a room, the value reached up 1/1. 2.
During 1987—1990, native sun and air cured tobacco resources in whole China were investigated in order to evaluate their quality and usebility.The investigation included their sorts, history, planting range, present situation and ecologic condition, The evaluation involved chemical analyse of leaf and smoke, the appearance property and smoking quality, such as total sugar, redue aroma, total N, nicotine, protein, TPM, leaf color, color shade and aroma, odor, irritancy, combustibility, ash.The total number o...
A colorimetric assay by the 2.4-dinitrophenylhydrazine for carbonyl compounds in the cigarette smoke has been developed. The linear range was 4.28×10~(-7)～1.54×10~(-4)mol/L (r=0.9978) The recovery and coefficient variation were 91.52～107.8% (n=12) and 4.1% (n=7), respectively, This method was used for the determination of carbonyl compounds in the main stream smoke of "Da chong jiu" cigarette (Kun ming).
主流烟气
mainstream smoke
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