Discriminant analysis method for distribution ratio of volatile and semi-volatile component in gas phase and particle phase in cigarette mainstream smoke

Abstract

The invention discloses a discriminant analysis method for distribution ratio of volatile and semi-volatile components in a gas phase and a particle phase in cigarette mainstream smoke. The method comprises the following steps of putting a cigarette sample to be tested in a smoke generator to smoke the cigarette, using a filter to capture the particle-phase part of mainstream smoke generated by smoking the cigarette, using an absorber carried with absorbing agent to capture the gas-phase part of the mainstream smoke generated by smoking the cigarette, conducting treatment to the filter after the cigarette is fully smoked to obtain extract liquid, filtration is conducted and gas chromatography / mass spectrometry (GC / MS) analysis is conducted to filtrate; and the absorbing agent is taken and GS / MS analysis is directly conducted to the absorbing agent to obtain all components in gas-phase matters and particle-phase matters of the mainstream smoke, wherein the absorber is placed in an ice-water mixture cold-trap system with temperature which is kept at zero degree. The discriminant analysis method disclosed by the invention provides a basis for the determination of benzenes and other chemical components in the cigarette mainstream smoke and further provides reference data for more comprehensively knowing smoke components and improving cigarette smoking safety.

Description

technical field [0001] The invention relates to the technical field of cigarette mainstream smoke analysis, in particular to a method for identifying and analyzing the distribution ratio of volatile and semi-volatile components in gas phase and particle phase in cigarette mainstream smoke. Background technique [0002] The chemical components of tobacco and smoke are extremely complex. There are 3044 chemical components in cigarette leaves and 3996 in smoke, of which 1172 are common to tobacco leaves and smoke, totaling 5868. When cigarettes are smoked, there are two combustion modes: suction combustion and smoldering combustion, which correspondingly produce mainstream smoke and sidestream smoke. Cigarette mainstream smoke is a complex aerosol composed of gaseous, vaporous and solid substances, which can pass through the Cambridge filter (a filter made of glass fiber at room temperature, which can filter out particles with a diameter greater than 0.3 μm) 99.5% or more) of ...

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Problems solved by technology

However, this method has the following problems: 1. It cannot completely capture highly volatile components, so it is not suitable for capturing components such as benzene with a boiling point lower than 100 degrees Celsius. For such components, the detection results are higher than the actual values. Low; 2. This scheme does not distinguish between gas phase and particulate matter, but captures all specific components of mainstream smoke, so it cannot be used to analyze the composition of each component in gas phase and particulate matter 3. This scheme greatly increases the suction resistance of the smoking machine system, making it difficult to meet the requirements of GB / T 16450-2004 "Definition and Standard Conditions of Smoking Machines for Routine Analysis" (usually between 250 and 500Pa), which affects the suction flow diagram, so that the detection results of particulate matter deviate from the actual situation; The results are prone to deviation

5. The use of commercial adsorption tubes is disposable. After capturing the flue gas, it is necessary to break the shell of the glass adsorption tube to take out the adsorbent inside for component extraction, so the cost is high

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