Detection Of Physicochemical Properties And Influencing Factors Of Heated Cigarette Smoke Aerosol

Heated cigarettes are one of the key products of my country's new tobacco research.At present,my country's heated cigarette products are in the development stage,and there are few basic and systematic researches,and there is a certain gap between them and foreign heated cigarette products.To this end,this research aims to establish a detection method for the physical and chemical properties of heated cigarette aerosols,analyze the aerosol properties of typical heated cigarette products at home and abroad,and carry out research on the influence factors of heated cigarette aerosols.The main research contents and results are as follows:1.The SCS-DMS method for real-time detection of aerosol particle size distribution of heated cigarettes was established,and conditions such as the dilution factor of smoke aerosol,sampling temperature,and smoking parameters were optimized to achieve real-time and accurate detection of particle size distribution of heated cigarettes.2.An ultrasonic extraction-GC-MS/MS method for quantitative detection of 112 aroma components in heated cigarette aerosols was established.The pre-processing conditions and mass spectrometry detection conditions of the method were optimized,and the recovery rate,RSD,limit of quantification,etc.of the method were evaluated,showing that The detection result of this method is stable and reliable,and can meet the detection requirements of aroma substances in heated cigarette aerosol.3.Using the established smoke aerosol characterization method,the particle size distribution and aroma component release of typical heated cigarette aerosols of different brands at home and abroad were analyzed and compared.The results show that there are differences in the particle size distribution spectrum of different heated cigarettes.In addition,the Marlboro series and HEETS series heated cigarettes have relatively high aerosol particle concentration;in terms of aroma components,there are obvious differences in aroma components between different brands and flavors,and the main differences are identified ingredient.4.The effects of tobacco raw materials,heating temperature,and moisture content of the tobacco core on the particle size distribution of heated cigarette aerosols were studied.The results show that flue-cured tobacco and sun-cured tobacco can increase the median diameter of aerosol particles(CMD);with the increase of heating temperature,the concentration of aerosol particles and the median diameter of particles show an increasing trend;with the increase of moisture content,the first few mouthfuls particle number concentration increased significantly.5.The effects of tobacco raw materials,heating temperature,and core moisture content on the release of aroma components of heated cigarette aerosols were studied.The results show that the types and amounts of actual components released can be significantly changed through the selection of raw materials,such as solanone,alkaloid metabolism,nitrogen heterocyclic substances produced by pyrolysis of burley tobacco as raw materials,and pyrazine produced by sun-cured tobacco as raw materials There are many metabolites of alkaloids.There are many metabolites of alkaloids,furfuryl alcohol,guaiacol and alkaloids produced from yellow sun-cured tobacco;when the heating temperature is higher than 300?,the main aroma components nicotine,5-hydroxymethyl furfural,furfural,solanidone,furfuryl alcohol,maltol,etc.grow rapidly;the moisture content is 30%-40%,the aerosol releases higher aroma components of aldehydes and ketones,the moisture content is 40-50%,alcohols,phenols And nicotine release is higher.