CN101806685B - Tobacco aerobic cracking analysis system - Google Patents
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Abstract
A tobacco aerobic cracking sampling system includes a cracker and an inert gas inlet. A cracking chamber and a cracking pool are arranged in the cracker. An eight-way valve is arranged in the cracking chamber. A second valve port of the eight-way valve is communicated with a gas inlet of the cracking pool. A seventh valve port of the eight-way valve is communicated with a gas outlet of the cracking pool. An eighth valve port of the eight-way valve empties. The tobacco aerobic cracking sampling system also includes a mixed gas inlet. The mixed gas inlet and the inert gas inlet are connected the eight-way valve through a four-way valve. A first valve port of the four-way valve is communicated with a third valve port of the eight-way valve. A second valve port of the four-way valve is communicated with the mixed gas inlet. A third valve of the four-way valve is communicated with the first valve port of the eight-way valve. A fourth port of the four-way valve is communicated with the inert gas inlet. A fifth valve port of the eight-way valve is communicated with a cold trap. The cold trap is connected to a GC chromatogram system. The system can ensure the continuous sampling and smooth transition.
Description
Technical field
The present invention relates to the cracking sampling system that grows tobacco.
Background technology
In cigarette product design and process of manufacture, in order to improve the quality of product, need the thermal cracking behavior of research tobacco leaf under simulation cigarette burning condition, thereby seek the relation between tobacco leaf chemical composition and the flue gas composition, and then explore the flue gas flavor matter, objectionable constituent form mechanism, be the cigarette flavouring, reducing tar and reducing harm research provides theoretical foundation.Existing C DS heated filament type cracker can adopt temperature programme, and is simple in structure, can be connected the chromatogram vaporizer easily before, dependable performance is used extensively, is adopted in a large number by tobacco business.But because common capillary chromatograph can not contact oxygen-containing atmosphere in temperature-rise period, therefore without transformation, existing cracking-gas chromatography mass spectrometry system can not carry out online aerobic Study on Cleavage.
Have two kinds of technology can realize the aerobic cracking in the industry at present: a kind of is to go up at heated filament type cracker (as CDS5000 series) to be equipped with the aerobic cracking that collecting trap is realized certain form.Another kind is that SPME (solid phase micro-extracting head) is combined with cracking system, realize aerobic cracking (list of references: Study of Pyrolysates of Flue Cured Tobacco Leaves andStemsChinese, Yang Weizu, XIE Gang, Journal of Chromatography, Vol.24 No.6,606～610).
But know-why from above-mentioned two kinds of methods, all realize the aerobic cracking by the such process of cracking-adsorption-desorption, its essence all is at first off-line cracking under the aerobic atmosphere, collect pyrolysis product by certain adsorption stuffing, the injection port that desorption enters GC (gas chromatograph) under inert atmosphere is realized the aerobic cracking at last.The common drawback of above-mentioned two kinds of methods is: (1) pyrolysis gas linear velocity is little, can not simulate the true environment of cigarette burning; (2) can not realize online continuous cracking-input mode; (3) absorption of adsorbent has selectivity, therefore can not realize effective absorption to some pyrolysis product, and then can have influence on the analysis result of cracking.Therefore above-mentioned two kinds of technology all can not be simulated true cigarette burning condition well.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of method of tobacco and smoking material being carried out the aerobic cracking analysis of simulating under the true burning condition of cigarette.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The one aerobic cracking analysis method that grows tobacco, it comprises the steps: at first tobacco sample to be placed in the cracking pond of cracker and carries out cracking, feeds in the cracking pond simultaneously and contains O
2And N
2Mixed gas purge, sweep gas is brought the tobacco sample pyrolysis product in one cold-trap into, described condenser temperature remains between-80 ℃ to-60 ℃, the tobacco sample pyrolysis product is by cold-trap condensation and capture, unnecessary gas shunting, treat to feed inert gas after the tobacco sample cracking is finished in cold-trap, cold-trap is heated up, the tobacco sample pyrolysis product of cold trap trapping is brought the GC system into by inert gas and is analyzed.
Preferably, described mixed gas by volume number percent contain 9% O
2With 91% N
2
Preferably, the flow of described mixed gas is 276ml/min.
Preferably, the cold-trap heating step is: at first kept 5 minutes at-60 ℃, be warming up to 260 ℃ with 12 ℃/s then and kept 5 minutes again.
Preferably, in the tobacco sample cracking process, the heating step of cracker is: earlier keep 5s for 300 ℃ in the beginning temperature, be warming up to 900 ℃ with the speed of 30 ℃/s then and keep 5s again.
Preferably, when the tobacco sample cracking, the temperature in the cracking room of cracker is 250 ℃.
Preferably, described inert gas is a He gas.
Preferably, the described inert gas flow linear velocity of bringing the tobacco sample pyrolysis product into the GC system is 30cm/min.
Such scheme has following beneficial effect: this tobacco aerobic cracking analysis method contains O by feeding in the cracking pond when tobacco sample carries out cracking
2Mixed gas purge as sweep gas, make tobacco sample can directly under the environment of aerobic, carry out cracking, thereby as much as possible true cigarette burning condition of simulation and operating mode are compared with the cracking of inert atmosphere anaerobic, and its experiment data result is more genuine and believable.The tobacco sample pyrolysis product is brought in the cold-trap that is under the low-temperature condition by sweep gas, the condensation and being captured under low-temperature condition of tobacco sample pyrolysis product, there is not selective problems in the method for this condensing trapping, can make the tobacco sample pyrolysis product by whole trapping.After cold-trap heated up, whole products of tobacco sample cracking can be analyzed along with inert gas enters in the GC system like this, thereby guaranteed to analyze the accuracy of data, and adopt this method sample introduction continuous, transitions smooth, operation steps is few, can guarantee the repeatability that data are good.
The invention also discloses a kind of sampling system of realizing above-mentioned tobacco aerobic cracking analysis method, it adopts following technical scheme:
The one aerobic cracking sampling system that grows tobacco, it comprises a cracker and inert gas entrance, be provided with cracking room and cracking pond in the described cracker, be provided with one eight logical valve in the described cracking room, second valve port of described eight logical valves is communicated with the air intake opening in described cracking pond, the 7th valve port of described eight logical valves is communicated with the gas outlet in described cracking pond, the 8th valve port emptying of described eight logical valves, also comprise mixed gas inlet, described mixed gas inlet, inert gas entrance is connected with described eight logical valves by a four-way valve, first valve port of described four-way valve is communicated with the 3rd valve port of described eight logical valves, second valve port of described four-way valve is communicated with described mixed gas inlet, the 3rd valve port of described four-way valve is communicated with first valve port of described eight logical valves, the 4th valve port of described four-way valve is communicated with described inert gas entrance, the 5th valve port of described eight logical valves is communicated with a cold-trap, and described cold-trap is connected with the GC chromatographic system.
Preferably, be equipped with pressure maintaining valve and throttling valve on described mixed gas inlet, inert gas entrance and the pipeline that described four-way valve is connected.
This tobacco aerobic cracking sampling system is by adding a four-way valve and a cold-trap on original cracker.Four-way valve can be realized the conversion of oxygen gas mixture and inert gas, thereby guarantees the timely air feed of online aerobic cracking of tobacco sample and inert gas, guarantees that sample introduction is continuous, transitions smooth.This system also has transformation, maintenance cost is low, the advantage that reliability is high.
Description of drawings
Fig. 1 is the structural representation of tobacco aerobic cracking sampling system when tobacco carries out the aerobic cracking.
Structural representation when Fig. 2 feeds inert gas for tobacco aerobic cracking sampling system after the cracking of tobacco aerobic is finished.
Fig. 3 is tobacco sample cracking mass spectrum total ion current figure.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described in detail.
The invention discloses the aerobic cracking sampling system that grows tobacco, its mechanism comprises cracker, 3 and inert gas entrances 4 of mixed gas inlet as shown in Figure 1, is provided with cracking room 5 and cracking pond 7 in the cracker, is provided with one or eight logical valves 2 in the cracking room 5.Mixed gas inlet 3, inert gas entrance 4 are connected with eight logical valves 2 by a four-way valve 1.Wherein first valve port 11 of four-way valve 1 is communicated with the 3rd valve port 23 of eight logical valves 2, second valve port 12 of four-way valve 1 is communicated with mixed gas inlet 3, the 3rd valve port 13 of four-way valve 1 is communicated with first valve port 21 of eight logical valves 2, and the 4th valve port 14 of four-way valve 1 is communicated with inert gas entrance 4.Second valve port 22 of eight logical valves 2 is communicated with the air intake opening 71 in cracking pond 7, and the 7th valve port 27 of eight logical valves 2 is communicated with the gas outlet 72 in cracking pond, and the 5th valve port 25 of eight logical valves 2 is communicated with a cold-trap 6, the 8th valve port 28 emptyings of eight logical valves 2.Be respectively equipped with a pressure maintaining valve 31 and a throttling valve 32 on mixed gas inlet 3 and pipeline that four-way valve 1 is connected, be respectively equipped with a pressure maintaining valve 41 and a throttling valve 42 on inert gas entrance 4 and the pipeline that four-way valve 1 is connected, cold-trap 6 is connected with GC chromatographic system 8.Above-mentioned pressure maintaining valve, throttling valve can accurately be controlled the flow and the pressure of mixed gas, inert gas, so that realize online cracking-chromatograph joint used analysis in the mode of constant voltage pressure reduction sample introduction.
Below in conjunction with above-mentioned tobacco aerobic cracking sampling system the disclosed by the invention one aerobic cracking analysis method that grows tobacco is described in detail.
1. key instrument and material
Used GC system is the 6890/5973GC-MS gas chromatography instrument of U.S. Agilent company, and used cracker is the cracker of CDS company 2000 series, and used tobacco sample is the yellow official B2F in Hongta District.Wherein the Gerstel CIS4 liquid nitrogen frozen injection port of 6890/5973GC-MS gas chromatography instrument outfit can be used as the cold-trap use.
2. these method concrete steps are as follows:
Take by weighing flue-cured tobacco (1 ± 0.05) mg tobacco sample, put into the cracking quartz ampoule, a certain amount of beyond the Great Wall silica wool in two is put into the quartz ampoule that testing sample is housed among the cracker spirality platinum filament circle.Open the gas chromatography instrument simultaneously, the liquid nitrogen frozen injection port as cold-trap is controlled between-80 ℃ to-60 ℃, open cracker then and begin the cracking tobacco sample.In the tobacco sample cracking process, the heating step of cracker is: earlier keep 5s for 300 ℃ in the beginning temperature, be warming up to 900 ℃ with the speed of 30 ℃/s then and keep 5s again, the temperature of cracking room 5 is 250 ℃.
When tobacco sample begins cracking, as shown in Figure 1, first valve port 11 of four-way valve 1 is communicated with second valve port 12, the 3rd valve port 13 is communicated with the 4th valve port 14, first valve ports 21 of eight logical valves 2 are communicated with the 8th valve port 28, second valve port 22 is communicated with the 3rd valve port 23, the 4th valve port 24 is communicated with the 5th valve port 25, the 6th valve port 26 is communicated with the 7th valve port 27, promptly can be used as sweep gas and be passed into that the air intake opening 71 in cracking pond 7 is interior to purge the tobacco pyrolysis product by the enter the mouth mixed gass of 3 feedings of mixed gas like this.Mixed gas by volume number percent contains 9% O
2With 91% N
2, the flow of mixed gas is 276ml/min, above-mentioned parameter just can be simulated the state value of tobacco when burning.Can make tobacco sample can directly under the environment of aerobic, carry out cracking like this, thus as much as possible true cigarette burning condition of simulation and operating mode compare with the cracking of inert atmosphere anaerobic, its experiment data result is more genuine and believable.
As shown in Figure 1, the mixed gas sweep gas is being carried 72 discharges from the gas outlet of tobacco sample pyrolysis product, and finally enter in the cold-trap 6 by eight the 5th valve ports 25 that lead to valves 2, this moment, the temperature of cold-trap 6 was controlled between-80 ℃ to-60 ℃, thereby under cold service the tobacco sample pyrolysis product with condensation by cold trap trapping, unnecessary gas shunting discharges, adopt the method for this condensing trapping not exist, can make the tobacco sample pyrolysis product by whole trapping to the selective problem of some pyrolysis product.After cold-trap heated up, whole products of tobacco sample cracking can be analyzed along with inert gas enters in the GC system like this, thereby guaranteed to analyze the accuracy of data.
After (being generally 40 seconds) treats that the tobacco sample cracking is finished according to the predefined time, as shown in Figure 2, second valve port 12 of four-way valve 1 is communicated with the 3rd valve port 13, first valve port 11 is communicated with the 4th valve port 14, first valve ports 21 of eight logical valves 2 is communicated with, the 3rd valve port 23 is communicated with the 4th valve port 24, the 5th valve port 25 is communicated with the 6th valve port 26, the 7th valve port 27 is communicated with the 8th valve port 28 with second valve port 28.The mixed gas of mixed gas inlet 3 feedings this moment is by the eight valve port 28 outside emptyings of 7 backs, cracking pond by eight logical valves 2, and the remaining tobacco sample pyrolysis product in the cracking pond 7 can be discharged with mixed gas, so that use the next time of cracker.And will enter in the cold-trap 6 by the 5th valve port 25 of eight logical valves 2 by the inert gas that inert gas entrance 4 enters, inert gas is brought tobacco sample pyrolysis product in the cold-trap 6 into the GC system as carrier gas and is analyzed, inert gas is a He gas, and the inert gas flow linear velocity is 30cm/min.
After feeding inert gas in the cold-trap 6, cold-trap 6 heats up, and its heating step is: at first kept 5 minutes at-60 ℃, be warming up to 260 ℃ with 12 ℃/s then and kept 5 minutes again.Along with the rising of temperature in the cold-trap 6, the tobacco sample pyrolysis product that is captured breaks away from cold-trap and enters in the GC system 8 with inert gas, and 8 pairs of tobacco sample pyrolysis products of GC system are analyzed.
The sampling system of this tobacco aerobic cracking analysis method is by adding the smooth conversion that a four-way valve has realized having oxygen gas mixture and inert gas on original cracker, guaranteed the timely air feed of online aerobic cracking of tobacco sample and inert gas carrier gas, guarantee that sample introduction is continuous, transitions smooth, this system also has transformation, maintenance cost is low, the advantage that reliability is high.
The GC chromatographic system adopts the 6890/5973GC-MS gas chromatography instrument of U.S. Agilent company, and when the tobacco sample pyrolysis product was analyzed, its concrete experiment parameter was as shown in the table:
The GC/MS experiment condition
Chromatographic column HP5-MS, 50m * 0.20mm id * 0.33 μ thickness
The shunt mode shunting, split ratio 50: 1
Carrier gas He
Carrier gas line speed 30cm/min
The cold injection port setting of Gerstel CIS4 (cold-60 ℃ keep 2min, and 12 ℃/s rises to 260 ℃, keeps 5min,
Trap) rises to 350 ℃ again, keep 5min
40 ℃ keep 2min, with 5 ℃/min's
Column oven temperature programme condition
Speed is warming up to 280 ℃ and keeps 5min
MS sweep limit 35-300amu
Solvent delay 4min
230 ℃ of ion source temperatures
150 ℃ of quadrupole rod temperature
Integrator ChemStation
Initial peak width 0.04
Initial threshold 18.00
Peak valley is opened to peak valley
Acromion is surveyed and is closed
As shown in the table by the tobacco leaf pyrolysis product that above-mentioned gas chromatography instrument analyzing and testing arrives:
Identify 80 kinds of compounds altogether, 15 kinds of ketone compounds wherein, 7 kinds of nitrogen-containing heterocycle compounds, 15 kinds of hydrocarbon compounds, 13 kinds of benzene and derivant thereof, 2 kinds of acid compounds, 4 kinds of ester type compounds, 3 kinds of alcohol compounds, 4 kinds of aldehyde compounds, 6 kinds of phenolic compounds, 11 kinds of other compounds, tobacco sample cracking mass spectrum total ion current figure is as shown in Figure 3.
Be the repeatability of verification msg, the aforesaid operations step is repeated 5 times that the representative material that the gained spectrogram is chosen 4 kinds of different boiling carries out integration, the value of four kinds of pyrolysis product peak areas of gained RSD% is as shown in the table:
Long-pending 5 the sample introduction RSD% in several pyrolysis products sharp side among the result of this method institute prove that all less than 5% these system's gained data have good repeatability as can be known from the above table.
More than tobacco aerobic cracking analysis method and sampling system that the embodiment of the invention provided are described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum; this description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (2)
1. the aerobic cracking sampling system that grows tobacco, it comprises a cracker and inert gas entrance, be provided with cracking room and cracking pond in the described cracker, be provided with one eight logical valve in the described cracking room, second valve port of described eight logical valves is communicated with the air intake opening in described cracking pond, the 7th valve port of described eight logical valves is communicated with the gas outlet in described cracking pond, the 8th valve port emptying of described eight logical valves, it is characterized in that: also comprise mixed gas inlet, described mixed gas inlet, inert gas entrance is connected with described eight logical valves by a four-way valve, first valve port of described four-way valve is communicated with the 3rd valve port of described eight logical valves, second valve port of described four-way valve is communicated with described mixed gas inlet, the 3rd valve port of described four-way valve is communicated with first valve port of described eight logical valves, the 4th valve port of described four-way valve is communicated with described inert gas entrance, the 5th valve port of described eight logical valves is communicated with a cold-trap, and described cold-trap is connected with the GC chromatographic system.
2. tobacco aerobic cracking sampling system according to claim 1 is characterized in that: be equipped with pressure maintaining valve and throttling valve on described mixed gas inlet, inert gas entrance and the pipeline that described four-way valve is connected.
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| US9034106B2 (en) * | 2010-03-26 | 2015-05-19 | Philip Morris Usa Inc. | Smoking article including alkanoylated glycoside |
| CN102735775A (en) * | 2011-04-06 | 2012-10-17 | 云南烟草科学研究院 | On-line entrapment and sample introduction method for gas chromatography-mass spectrometry analysis of pyrolyzate of material used for cigarette |
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| CN102735786B (en) * | 2012-06-04 | 2014-04-16 | 云南烟草科学研究院 | Online trapping and analyzing method for benzo[a]pyrene in thermal cracking products, and apparatus thereof |
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| CN105433431B (en) * | 2014-11-12 | 2018-12-07 | 湖南中烟工业有限责任公司 | A kind of electronic cigarette liquid and electronic cigarette |
| CN111504983A (en) * | 2020-05-07 | 2020-08-07 | 北京莱伯泰科仪器股份有限公司 | Device and method for combining thermal cracking with ICP/MS or ICP/OES |
| CN111707774B (en) * | 2020-07-16 | 2023-05-12 | 中国检验检疫科学研究院 | Method for detecting volatile compounds in tobacco |
| CN114545014B (en) * | 2022-04-22 | 2022-08-09 | 成都理工大学 | Double-channel sample introduction system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241055A (en) * | 2008-02-20 | 2008-08-13 | 广东中烟工业有限责任公司 | Tobacco pyrolytic cracking analytical method |
| CN201110815Y (en) * | 2007-12-18 | 2008-09-03 | 武汉烟草(集团)有限公司 | Cigarette fume cold well capturing apparatus made by polytetrafluorethylene |
| CN201293774Y (en) * | 2008-10-10 | 2009-08-19 | 上海烟草（集团）公司 | Gas chromatograph |
| CN101566535A (en) * | 2009-06-03 | 2009-10-28 | 湖南中烟工业有限责任公司 | Smoking machine-mainstream flue gas cold trap integrated device and using method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3005283B2 (en) * | 1990-11-30 | 2000-01-31 | 日本たばこ産業株式会社 | Tobacco smoke introduction device |
| JP3108794B2 (en) * | 1991-12-27 | 2000-11-13 | ジーエルサイエンス株式会社 | Volatile hydrocarbon continuous automatic analyzer |
-
2010
- 2010-04-22 CN CN2010101535161A patent/CN101806685B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110815Y (en) * | 2007-12-18 | 2008-09-03 | 武汉烟草(集团)有限公司 | Cigarette fume cold well capturing apparatus made by polytetrafluorethylene |
| CN101241055A (en) * | 2008-02-20 | 2008-08-13 | 广东中烟工业有限责任公司 | Tobacco pyrolytic cracking analytical method |
| CN201293774Y (en) * | 2008-10-10 | 2009-08-19 | 上海烟草（集团）公司 | Gas chromatograph |
| CN101566535A (en) * | 2009-06-03 | 2009-10-28 | 湖南中烟工业有限责任公司 | Smoking machine-mainstream flue gas cold trap integrated device and using method thereof |
Non-Patent Citations (5)
| Title |
|---|
| JP平4-204350A 1992.07.24 |
| JP特开平6-167482A 1994.06.14 |
| R. W. Jenkins et al..Neutron Activation Analysis in Tobacco and Cigarette Smoke Studies 2R1 Cigarette Composition Smoke Transference and Butt Filtration.《Beitrage zur Tabakforschung International》.1985,第13卷(第2期),59-65. * |
| 孔浩辉等.卷烟烟丝热裂解产物香味成分分析.《烟草科技》.2009,(第5期),38-43,47. * |
| 杜学伟等.热脱附/冷阱聚焦/气相色谱/质谱法卷烟香气分析.《分析测试技术与仪器》.2007,第13卷(第1期),33-40. * |
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