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A method for on-line analysis of cigarette mainstream smoke and its dedicated on-line analysis device
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A cigarette mainstream smoke and analysis method technology, applied in the direction of measuring devices, analysis materials, sampling devices, etc., can solve the problems of difficulty in ensuring the repeatability of sampling, limitations of qualitative and quantitative analysis of cigarette smoke components, and pollution of sampling channels, etc. Accurate and reliable quantification, high sensitivity, simple and convenient operation
Active Publication Date: 2017-04-05
CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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However, because the particulate matter of cigarette smoke is easy to deposit in the pipes of smoking machines and analytical instruments, according to literature reports, most of the current online analysis techniques are aimed at the gas phase of cigarette smoke due to the limitation of the interface technology between smoking machines and related instruments. For analysis, in terms of sampling, a six-way valve is often used for sampling or directly through the negative pressure environment of the analysis system for sampling and analysis, which will lead to problems such as difficulty in ensuring the repeatability of sampling and contamination of the sampling channel.
Therefore, this technique is limited in both qualitative and quantitative analysis of cigarette smoke components
Domestically, Shanghai Tobacco Group Corporation adopts a 20-channel rotary table smoking machine instead of a single-channel smoking machine. Taking advantage of the characteristics of its rotating suction, it uses the air suction of the next channel to eliminate the memory effect, which solves the problem of smoke in the suction channel to a certain extent. However, the contamination of the mass spectrometer sampling channel cannot be eliminated, and the repeatability of system sampling needs to be further improved
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[0036] The specific operation steps are as follows:
[0037] Turn on the IMR-MS system and preheat it for less than 48 hours, using a dynamic standard gas generator to produce 1,3-butadiene (50 ppm), isoprene (500 ppm), benzene (50 ppm), toluene ( 100 ppm), acetaldehyde (500 ppm), acetone (100 ppm), 2-butanone (100 ppm) and other standard gases, the mass spectrometry system of the IMR-MS is quantitatively calibrated by the single-point calibration method.
[0038] Turn on the smoking machine to preheat for more than 20 minutes, and set the parameters of the smoking machine according to ISO3308 (suction volume: 35 mL, smoking duration: 2 s, smoking frequency: 60 s, ambient wind speed of the smoking machine: 200 mm / s).
[0039] Set the mass spectrometry conditions of the IMR-MS system as follows:
[0053] The specific operation steps are as follows:
[0054] Turn on the IMR-MS system and preheat it for less than 48 hours, using a dynamic standard gas generator to produce 1,3-butadiene (50 ppm), isoprene (500 ppm), benzene (50 ppm), toluene ( 100 ppm), acetaldehyde (500 ppm), acetone (100 ppm), 2-butanone (100 ppm) and other standard gases, the mass spectrometry system of the IMR-MS is quantitatively calibrated by the single-point calibration method.
[0055] Turn on the smoking machine to preheat for more than 20 minutes, and set the parameters of the smoking machine according to the Canadian standard for deep smoking (suction volume 55 mL, smoking duration 2 s, suction frequency 30 s, and ambient wind speed of the smoking machine 200 mm / s).
[0056] Set the mass spectrometry conditions of the IMR-MS system as follows:
[0057]...
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Abstract
An on-line analysis method for cigarette mainstream smoke and a special online analysis device thereof, which use a smoking machine and ion-molecular reaction mass spectrometry (IMR-MS) to online analyze seven organic compounds in cigarette mainstream smoke. The analysis device includes: a single-channel smoking machine, ion-molecular reaction mass spectrometry and corresponding interfaces. The analysis method is: when the cigarette is smoked, the mainstream smoke is stably sampled by the standard constant flow hole device and then directly introduced into the massspectrometer through the hollow capillary for mass spectrometry analysis. Cigarette smoke is adsorbed by condensation in the capillary. During the interval between every two puffs of cigarette smoke, the residual smoke in the sampling channel was removed by backflushing with high-purity nitrogen. Compared with the traditional analysis method, the device of the present invention is simple and easy to operate, and can realize quantitative collection of cigarette smoke samples, so as to truly realize online analysis and testing of cigarette smoke, with high sensitivity, good repeatability, and accurate and reliable results.
Description
technical field [0001] The present invention relates to the field of analysis of cigarette smoke, in particular to an online analysis method for cigarette mainstream smoke and a dedicated online analysis device thereof, which is a method for online analysis of some compounds in cigarette mainstream smoke by using ion-molecular reaction mass spectrometry (IMR-MS) . Background technique [0002] Cigarette smoke is an aerosol produced by the burning of cigarettes. It is a complex chemical system that is constantly changing. It is produced by the burning, cracking and distillation of shredded tobacco cylinders during the smoking process of cigarettes. The analysis of the chemical composition of cigarette smoke is a basic research work. So far, people have identified more than 5,000 substances from cigarette smoke, most of which are active in nature, making cigarette smoke a highly dynamic and constantly changing environment. Aerosol mixing system. Since the formation of cigare...
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62G01N1/22
Inventor 庞永强陈再根罗彦波姜兴益李雪朱风鹏侯宏卫
Owner CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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