CN104198573A - On-line analysis method for main stream smoke gas of cigarettes and special on-line analysis device thereof - Google Patents
On-line analysis method for main stream smoke gas of cigarettes and special on-line analysis device thereof Download PDFInfo
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Abstract
The invention relates to an on-line analysis method for main stream smoke gas of cigarettes and a special on-line analysis device thereof. A smoking machine and an ion molecule reaction mass spectrum (IMR-MS) are used for analyzing 7 kinds of organic compounds in the main stream smoke gas of the cigarette in an on-line manner. The analysis device comprises a single-hole path smoking machine, the ion molecule reaction mass spectrum and a corresponding interface. The analysis method comprises the following steps: when the cigarettes are sucked, and after the main stream smoke gas is stabilized and sampled through a standard constant current hole device, the main stream smoke gas is directly introduced into a mass spectrum instrument through a hollow capillary for mass spectrometric analysis, the part, extending out of a mass spectrum system, of the capillary is heated and kept warm through a temperature control transmission line so as to prevent the smoke gas of the cigarettes from being adsorbed due to condensation in the capillary; during the interval of every two times of sucking the smoke gas of the cigarettes, a manner of reverse blowing high purity nitrogen is used for eliminating the remained smoke gas in a sampling passage. Compared with the traditional analysis method, the device disclosed by the invention is simple, the operation is convenient, and the quantitative acquisition of samples of the smoke gas of the cigarette can be realized, so that the on-line analysis and test of the smoke gas of the cigarettes are truly realized, the sensitivity is high, the repeatability is good, and the result is accurate and reliable.
Description
Technical field
The present invention relates to cigarette smoke analysis field, specifically a kind of cigarette mainstream flue gas on-line analysis and special-purpose on-line analysis device thereof, be the method for utilizing part of compounds in ion molecule reaction mass spectrum (IMR-MS) on-line analysis cigarette mainstream flue gas.
Background technology
Cigarette smoke is a kind of gasoloid that cigarette burning produces, and is a complicated chemical system constantly changing, and in cigarette smoking process, by the burning of pipe tobacco cylinder, cracking, distillation, is produced.The analysis of cigarette smoke chemical composition is a basic research job, up to now, people have identified 5000 many kinds of substances from cigarette smoke, and most physical properties are active, and causing cigarette smoke is a gasoloid mixed system highly dynamic, that constantly change.Because the formation of cigarette smoke is a dynamic process, traditional off-line analysis method adopts the trapping techniques such as cambridge filter, cold-trap, static, solution absorption to collect cigarette smoke conventionally, then adopt as required the pretreatment process such as solvent extraction, Solid-Phase Extraction to carry out sample extraction, purification and enrichment, finally adopt the instruments such as chromatogram, mass spectrum, spectrum to carry out analytical test.Because, off-line analysis method is subject to the impact of the factors such as purification, pre-concentration, separation of the trapping of flue gas sample, evaluating objects thing, analytic process complexity and time and effort consuming, and test result reflects is also the feature of ageing flue gas.Because cigarette smoke chemical composition character is active, can detection method really reflect that the chemical composition of " fresh " flue gas is very important problem.For investigating the chemical feature of " fresh " flue gas, some on-line analysis technology are attempted analyzing and researching for cigarette smoke.
Development along with mass-spectrometric technique, the on-line analysis that soft ionization technology is applied to flue gas gas phase at the beginning of 21 century detects, and main mass-spectrometric technique has ion molecule reaction mass spectrum (IMR-MS), many proton uptakes induced with laser dissociate mass spectrum (REMPI-MS), single photon ionization mass spectrum (SPI-MS) etc.Multiple soft ionization technology utilizes ion-molecule reaction to realize sample molecule ionization, make to be difficult for forming the compound of molion under mass spectrum condition, by the active reaction ion generation ion molecule reaction with reactant gas molecules generation, the adduct ion of formation and these ions, thus can carry out the analysis of potpourri according to the molecular weight of compound and ionization energy.And for the very micro-material of the textural differences such as isomers, utilize molion reaction can obtain different mass spectrum results, thereby complete analysis.
In recent years, the on-line analysis research of cigarette smoke is subject to day by day to researcher's concern and attention, ion molecule reaction and vacuum ultraviolet ionized two kinds of technology have become the effective means of cigarette smoke on line real time.IMR-MS adopts ion molecule reaction technology, utilizes the Hg of low ion energy
+, Xe
+, Kr
+deng obtain molecule counting after compound molecule ionization to be analyzed after quadrupole rod mass analyzer, by software systems, gather and process, preserve, transmit data, monitor in real time.Do not need sample pretreatment, Direct Sampling instant analysis; To polarity, non-polar compound etc., all can analyze.Yet, because cigarette smoke granule phase substance matter is easily in smoking machine pipeline and analytical instrument deposition, from documents and materials, report, limited by the interfacing of smoking machine and pertinent instruments, current on-line analysis technology is partly to analyze for components in cigarette smoke gas phase mostly, aspect sampling, adopt more six-way valve sampling or directly the subnormal ambient by analytic system carry out sample analysis, this will bring sampling repeatability to be difficult to guarantee and the problem such as sampling channel pollution.Therefore, this technology is all subject to certain restrictions when cigarette smoke component is carried out to qualitative and quantitative analysis.Domestic, Shanghai Tobacco group company adopts 20 duct rotating disk smoking machines to replace one channel smoke sucking machine, utilize the feature of its rotation suction, with the suction in next duct, carry out the elimination of memory effect, solved to a certain extent the residual impact causing of suction channel flue gas, but the pollution of mass spectrum sampling channel still cannot be eliminated, the repeatability of simultaneity factor sampling also needs further to be improved.
Summary of the invention
The object of the invention is the weak point existing for existing cigarette smoke on-line analysis technology and a kind of cigarette mainstream flue gas on-line analysis and the device of inventing is the method for utilizing the part of compounds in smoking machine and ion molecule reaction mass spectrum on-line analysis cigarette mainstream flue gas.Provide a kind of simple in structure, easy to operate, can realize under various puffing regimenses, the various ingredients in single port cigarette smoke is carried out to on-line analysis, for studying the chemical feature of " fresh " flue gas, provide a kind of good technological means.
The object of the invention is to be achieved through the following technical solutions:
A kind of cigarette mainstream flue gas on-line analysis, by the method for the part of compounds in one channel smoke sucking machine and ion molecule reaction mass spectrum on-line analysis cigarette mainstream flue gas, the sampling of main flume is all crossed standard constant current hole device and is realized, part main flume is introduced directly into IMR-MS by hollow kapillary after being sampled by standard constant current hole device, and the part of stretching out mass spectrometer system at kapillary is provided with heating and thermal insulation facility, between every two mouthfuls of cigarette smoke analyses, adopt high pure nitrogen blowback to remove the residual flue gas in sampling channel, sampling channel and smoking machine interface temperature are 180 ℃, sampling channel temperature is 250 ℃, the interface temperature of sampling channel and IMR-MS is 250 ℃, sampled pressure is that sampled pressure is 20 mbar.
The condition of described IMR-MS is as follows:
Ion gun: mercury (Hg) 10.44 eV; Also can select other ion gun according to the difference of target compound, as xenon (Xe) 12.13 eV, krypton (Kr) 14.00 eV etc.;
Quality surface sweeping scope: 3 ~ 500 amu;
Resolution: 1 amu;
Minute: 50 ms;
Quota ion: determine according to evaluating objects compound.
Realizing above-mentioned on-line analysis special-purpose on-line analysis device used is constructed as follows: comprise one channel smoke sucking machine and ion molecule reaction mass spectrum IMR-MS that cigarette clamper is connected by flexible pipe with cigarette clamper, between cigarette clamper and one channel smoke sucking machine, be connected with a two-bit triplet solenoid valve, another outlet at this two-bit triplet solenoid valve is contacted by constant-current device and kapillary sampling pipe and IMR-MS, between kapillary sampling pipe and IMR-MS, be also provided with a two-bit triplet solenoid valve, another outlet of this two-bit triplet solenoid valve is connected with nitrogen back-blowing device, on kapillary sampling pipe, be provided with heating and thermal insulation layer.
Described capillary inner diameter 0.32mm.
Described main flume sampling is that standard constant current hole is realized by standard constant current hole device, can guarantee the repeatability of sampling process.The dismounting easily of standard constant current hole device, controls flow and can determine according to actual needs, is generally 1 ~ 10 mL/s.By flow and the accurate control in sampling time (suction duration), can guarantee the sampling repeatability in every mouthful of aspiration procedure.
All process through deactivation the sampling channel inside of described main flume.
Described sampling channel is hollow kapillary, is provided with heating and heat-insulating device outward, can adopt heater block to heat whole sampling channel.The design is in order to prevent that flue gas from affecting sample analysis in sampling channel condensation.
Part of compounds in on-line analysis cigarette mainstream flue gas of the present invention, specifically comprises the steps:
Open IMR-MS following upper with heat 48 hours, adopt dynamic standard gas generator, the calibrating gas that produces variable concentrations also carries out quantitative correction to the mass spectrometer system of IMR-MS, and timing generally adopts calibrating gas Single Point Correction Method to carry out.
Open smoking machine preheating more than 20 minutes, according to test, need to set smoking machine parameter.
Smoking cigarette while carrying out the on-line analysis of target compound in cigarette mainstream flue gas, smoking cigarette under standard conditions, part main flume (3.5 mL) is quantitatively incorporated into IMR-MS through standard constant current hole device and carries out on-line analysis, and remaining most of cigarette smoke is discharged with smoking machine suction channel.Its concrete analysis process is as follows: set lighting cigarette after cigarette smoking pattern, in 2 s aspiration procedure of cigarette, (there is certain pressure differential by standard constant current hole in (3.5 mL) cigarette mainstream flue gas partly between the two ends of constant current aperture apparatus, when pressure differential is greater than some values, gas with constant flow velocity by constant current hole, thereby realize sampling analysis) enter the sampling channel of IMR-MS, the hollow kapillary of band heating arrangement is introduced directly in IMR-MS ion gun and is ionized simultaneously, thereby realizes the on-line analysis of cigarette smoke.After every mouthful of suction finishes, by the automatic switchover of solenoid valve.Utilize high pure nitrogen to carry out blowback to eliminate the residual impact on subsequent analysis test of front a bite flue gas to whole exhaust gases passes.
What the present invention can realize cigarette mainstream flue gas is pumped in line analysis by mouth, and the introducing of flue gas sample realizes by standard constant current hole device, simple to operation, reproducible.Can detect compound dissimilar in cigarette mainstream flue gas, this method is highly sensitive, reproducible simultaneously, quantitatively accurately and reliably.Between every mouthful of suction of cigarette, adopt the mode of high pure nitrogen blowback to clean exhaust gases passes, can effectively eliminate cigarette mainstream flue gas by mouth analytic process because of the residual experimental error causing of the flue gas between two mouthfuls of suctions.Utilize the present invention to 1,3-butadiene in cigarette mainstream flue gas, isoprene, benzene, toluene, 7 kinds of compounds such as acetaldehyde, acetone, 2-butanone carry out online by mouth analysis.Adopt reference cigarette, to method carried out in a few days, repeatability is investigated in the daytime, concrete outcome is as shown in Table 1 and Table 2.From the results of view: no matter each target compound is the single port burst size of first 7 mouthfuls or the relative deviation of whole cigarette burst size is all less than 15%, differing greatly of last a bite burst size, be mainly because different cigarette combustion rates there are differences, cause the last difference that suction causes for imperfect suction flatly.The test result of reference cigarette 1R5F and 3R4F and traditional analysis testing result are compared to analysis, as shown in Figure 3 and Figure 4, result shows that the present invention is basically identical to the test result of whole cigarette smoke burst size of reference cigarette and classic method acquired results.
the method of 7 kinds of target compounds of table 1 in a few days repeatability (RSD, the % of unit) (n=10)
| Mouth number | Acetaldehyde | 1,3-butadiene | Acetone | Isoprene | 2-butanone | Benzene | Toluene |
| X1 | 6.54 | 4.48 | 11.52 | 10.69 | 12.03 | 13.45 | 14.92 |
| X2 | 4.03 | 5.42 | 5.14 | 4.11 | 0.84 | 4.04 | 0.24 |
| X3 | 5.04 | 2.68 | 7.35 | 5.3 | 5.17 | 8.96 | 5.77 |
| X4 | 5.42 | 5.97 | 9.12 | 8.66 | 5.06 | 12.72 | 5.46 |
| X5 | 5.4 | 2.8 | 8.84 | 6.83 | 3.66 | 1.01 | 0.66 |
| X6 | 6.04 | 6.12 | 8.12 | 7.51 | 4.81 | 6.21 | 13.8 |
| X7 | 5.42 | 3.24 | 5.64 | 3.28 | 5.47 | 6.32 | 1.29 |
| X8 | 32.66 | 23.03 | 29.13 | 22.73 | 21.7 | 32.93 | 45.45 |
| Total amount | 6.25 | 10.58 | 6.87 | 13.11 | 5.27 | 10.58 | 13.75 |
the method of 7 kinds of target compounds of table 2 in the daytime repeatability (RSD, the % of unit) (n=10)
| Mouth number | Acetaldehyde | 1,3-butadiene | Acetone | Isoprene | 2-butanone | Benzene | Toluene |
| X1 | 8.92 | 9.36 | 8.19 | 6.31 | 7.29 | 6.17 | 7.39 |
| X2 | 3.74 | 3.06 | 3.04 | 4.31 | 4.80 | 9.56 | 8.24 |
| X3 | 4.23 | 2.94 | 3.29 | 4.68 | 4.80 | 9.53 | 8.43 |
| X4 | 4.02 | 3.35 | 3.64 | 4.50 | 6.34 | 9.99 | 9.16 |
| X5 | 3.94 | 3.51 | 3.85 | 4.80 | 5.57 | 10.90 | 9.47 |
| X6 | 4.37 | 3.63 | 4.28 | 5.26 | 5.75 | 10.89 | 9.85 |
| X7 | 4.61 | 3.34 | 3.79 | 5.34 | 5.40 | 12.90 | 9.64 |
| X8 | 14.56 | 18.05 | 16.47 | 24.32 | 26.58 | 31.80 | 28.14 |
| Total amount | 5.24 | 6.08 | 4.71 | 5.64 | 5.83 | 3.95 | 4.22 |
Accompanying drawing explanation
Fig. 1 is cigarette mainstream flue gas on-line analysis system connection diagram,
Wherein: 1, cigarette; 2, cigarette clamper; 3, two-bit triplet solenoid valve (3a, cigarette clamper and suction channel interface and blowback air outlet, 3b, sampling pipe and IMR-MS interface and blowback air import); , 4, connect the flexible pipe of suction syringe and cigarette clamper; 5, cambridge filter; 6, smoking machine suction syringe; 7, flue gas sampling mouth (standard constant current hole device); 8, hollow kapillary sampling pipe (internal diameter 0.32mm); 9, heating and thermal insulation pipe; 10, IMR-MS system.
Fig. 2 is the on-line analysis monitoring ion figure of 7 kinds of target compounds;
Fig. 3 is reference cigarette (1R5F) test result and the comparison of classic method test result;
Fig. 4 is reference cigarette (3R4F) test result and the comparison of classic method test result.
Embodiment
below in conjunction with specific embodiment, the present invention is further elaborated, these embodiment are only for being not used in and limiting the scope of the invention further illustrating of this patent.
embodiment 1
1,3-butadiene in cigarette smoke, isoprene, benzene, toluene, acetaldehyde, acetone, 2-butanone online by mouth analysis.
Concrete operation step is as follows:
Open IMR-MS system preheating 48 hours following on, adopt dynamic standard gas generator, produce 1,3-butadiene (50 ppm), isoprene (500 ppm), benzene (50 ppm), toluene (100 ppm), the calibrating gas such as acetaldehyde (500 ppm), acetone (100 ppm), 2-butanone (100 ppm), adopt Single Point Correction Method to carry out quantitative correction to the mass spectrometer system of IMR-MS.
More than opening smoking machine preheating 20 min, according to ISO3308, set smoking machine parameter (suction capacity 35 mL, take out duration 2 s, suction frequency 60 s, smoking machine ambient wind velocity 200 mm/s).
The mass spectrum condition that IMR-MS system is set is as follows:
Smoking machine interface temperature is 180 ℃; Sampling channel temperature is 250 ℃; The interface temperature of sampling channel and IMS-MS is 250 ℃; Sampled pressure is 20 mbar.
Ion gun: mercury (Hg) 10.44 eV;
Mass scanning scope: 3 ~ 500 amu;
Resolution: 1 amu;
Minute: 50 ms;
Strength of current: 45 mA;
Target compound and quota ion: 1,3-butadiene (54,53), isoprene (68,67), benzene (78), toluene (92), acetaldehyde (44), acetone (58), 2-butanone (72).
Cigarette sample A is placed in to (22 ± 1) ℃, and under relative humidity (60 ± 2) % condition, balance is 48 hours, then selects (average quality ± 0.02) g and is used for test analysis with the cigarette of (average resistance to suction ± 50) Pa.
In 2 s aspiration procedure of cigarette, two-position three-way valve (3a) adds and holds device and suction channel communicating state in cigarette, two-position three-way valve (3b) is in sampling pipe and IMR-MS communicating state, 3.5mL cigarette mainstream flue gas is quantitatively introduced hollow kapillary by standard constant current hole device, the hollow kapillary of band heating arrangement is introduced directly in IMR-MS ion gun and is ionized simultaneously, thereby realizes the on-line analysis of cigarette smoke.After suction finishes, two-position three-way valve (3a) automatically switches and suction channel and cigarette to be added hold device to disconnect, two-position three-way valve (3b) automatically switches sampling pipe and IMR-MS is disconnected, high pure nitrogen enters by valve (3a) system pipeline is carried out to blowback (duration 20 s) from valve (3b), to eliminate the impact of front a bite suction on subsequent analysis test.Concrete sample test result is as shown in table 3.
the on-line analysis result (ISO suction mode) of 7 kinds of target compounds in table 3 cigarette sample A main flume
| Acetaldehyde (μ g) | 1,3-butadiene (μ g) | Acetone (μ g) | Isoprene (μ g) | 2-butanone (μ g) | Benzene (μ g) | Toluene (μ g) | |
| The 1st mouthful | 28.5 | 3.0 | 9.7 | 13.4 | 3.1 | 2.2 | 2.3 |
| The 2nd mouthful | 34.4 | 1.6 | 14.1 | 11.7 | 4.4 | 1.7 | 3.2 |
| The 3rd mouthful | 31.0 | 1.5 | 13.9 | 12.8 | 5.6 | 2.1 | 3.8 |
| The 4th mouthful | 42.6 | 1.8 | 16.5 | 13.6 | 6.2 | 2.2 | 4.3 |
| The 5th mouthful | 39.7 | 2.0 | 14.8 | 14.6 | 5.1 | 1.9 | 3.8 |
| The 6th mouthful | 48.0 | 2.4 | 19.0 | 19.5 | 6.0 | 2.4 | 4.2 |
| The 7th mouthful | 50.1 | 2.5 | 22.0 | 20.1 | 7.0 | 2.6 | 5.6 |
| The 8th mouthful | 8.4 | 0.5 | 3.6 | 3.8 | 1.4 | 0.7 | 1.2 |
| Whole | 282.7 | 15.4 | 113.6 | 109.5 | 38.8 | 15.7 | 28.4 |
embodiment 2
1,3-butadiene in cigarette smoke, isoprene, benzene, toluene, acetaldehyde, acetone, 2-butanone online by mouth analysis.
Concrete operation step is as follows:
Open IMR-MS system preheating 48 hours following on, adopt dynamic standard gas generator, produce 1,3-butadiene (50 ppm), isoprene (500 ppm), benzene (50 ppm), toluene (100 ppm), the calibrating gas such as acetaldehyde (500 ppm), acetone (100 ppm), 2-butanone (100 ppm), adopt Single Point Correction Method to carry out quantitative correction to the mass spectrometer system of IMR-MS.
More than opening smoking machine preheating 20 min, according to Canadian degree of depth suction standard setting smoking machine parameter (suction capacity 55 mL, take out duration 2 s, suction frequency 30 s, smoking machine ambient wind velocity 200 mm/s).
The mass spectrum condition that IMR-MS system is set is as follows:
Smoking machine interface temperature is 180 ℃; Sampling channel temperature is 250 ℃; The interface temperature of sampling channel and IMS-MS is 250 ℃; Sampled pressure is 20 mbar.
Ion gun: mercury (Hg) 10.44 eV;
Mass scanning scope: 3 ~ 500 amu;
Resolution: 1 amu;
Fix time: 50 ms;
Strength of current: 45 mA;
Target compound and quota ion: 1,3-butadiene (54,53), isoprene (68,67), benzene (78), toluene (92), acetaldehyde (44), acetone (58), 2-butanone (72).
Cigarette sample B is placed in to (22 ± 1) ℃, and under relative humidity (60 ± 3) % condition, balance is 48 hours, then selects (average quality ± 0.02) g and is used for test analysis with the cigarette of (average resistance to suction ± 50) Pa.
In the 2s of cigarette aspiration procedure, two-position three-way valve (3a) adds and holds device and suction channel communicating state in cigarette, two-position three-way valve (3b) is in sampling pipe and IMR-MS communicating state, 3.5 mL cigarette mainstream flue gas are quantitatively introduced hollow kapillary by standard constant current hole device, the hollow kapillary of band heating arrangement is introduced directly in IMR-MS ion gun and is ionized simultaneously, thereby realizes the on-line analysis of cigarette smoke.After suction finishes, two-position three-way valve (3a) automatically switches and suction channel and cigarette to be added hold device to disconnect, two-position three-way valve (3b) automatically switches sampling pipe and IMR-MS is disconnected, high pure nitrogen enters from valve (3b), by valve (3a), get rid of system pipeline is carried out to blowback (duration 20s), to eliminate the impact of front a bite suction on subsequent analysis test.Concrete sample test result is as shown in table 4
the on-line analysis result (HCI suction mode) of 7 kinds of target compounds in table 4 cigarette sample B main flume
| Acetaldehyde (μ g) | 1,3-butadiene (μ g) | Acetone (μ g) | Isoprene (μ g) | 2-butanone (μ g) | Benzene (μ g) | Toluene (μ g) | |
| The 1st mouthful | 163.0 | 19.1 | 55.3 | 91.3 | 19.5 | 15.4 | 14.8 |
| The 2nd mouthful | 127.0 | 7.6 | 54.9 | 50.2 | 19.5 | 8.4 | 14.7 |
| The 3rd mouthful | 102.0 | 5.9 | 45.9 | 42.8 | 18.4 | 7.8 | 13.4 |
| The 4th mouthful | 99.5 | 6.9 | 44.9 | 50.6 | 14.7 | 7.6 | 13.0 |
| The 5th mouthful | 117.0 | 6.9 | 52.3 | 49.2 | 17.0 | 9.0 | 13.8 |
| The 6th mouthful | 87.6 | 6.1 | 42.8 | 42.4 | 14.6 | 6.8 | 11.6 |
| The 7th mouthful | 88.5 | 6.0 | 48.2 | 35.6 | 15.9 | 7.7 | 13.4 |
| The 8th mouthful | 104.0 | 5.5 | 49.1 | 44.5 | 16.9 | 7.8 | 14.1 |
| The 9th mouthful | 91.2 | 4.9 | 43.8 | 36.4 | 14.8 | 6.5 | 12.3 |
| The 10th mouthful | 9.8 | 0.4 | 4.4 | 4.1 | 1.2 | 0.6 | 1.1 |
| Whole | 989.6 | 69.3 | 441.6 | 447.1 | 152.5 | 77.7 | 122.2 |
Claims (4)
1. a cigarette mainstream flue gas on-line analysis, it is characterized in that: be by the method for the part of compounds in one channel smoke sucking machine and ion molecule reaction mass spectrum on-line analysis cigarette mainstream flue gas, the sampling of main flume realizes by standard constant current hole device, part main flume is introduced directly into IMR-MS by hollow kapillary after the sampling of standard constant current hole device, and the part of stretching out mass spectrometer system at kapillary is provided with heating and thermal insulation facility, between every two mouthfuls of cigarette smoke analyses, adopt high pure nitrogen blowback to remove the residual flue gas in sampling channel, sampling channel and smoking machine interface temperature are 180 ℃, sampling channel temperature is 250 ℃, the interface temperature of sampling channel and IMR-MS is 250 ℃, sampled pressure is that sampled pressure is 20 mbar.
2. cigarette mainstream flue gas on-line analysis according to claim 1, is characterized in that: the condition of described IMR-MS is as follows:
Ion gun: mercury (Hg) 10.44 eV; Or select other ion gun according to the difference of target compound, as xenon (Xe) 12.1 3eV, krypton (Kr) 14.00 eV;
Quality surface sweeping scope: 3 ~ 500 amu;
Resolution: 1 amu;
Minute: 50 ms;
Quota ion: determine according to evaluating objects compound.
3. the special-purpose on-line analysis device that cigarette mainstream flue gas on-line analysis as claimed in claim 1 is used, it is characterized in that: comprise one channel smoke sucking machine and ion molecule reaction mass spectrum IMR-MS that cigarette clamper is connected by flexible pipe with cigarette clamper, between cigarette clamper and one channel smoke sucking machine, be connected with a two-bit triplet solenoid valve, another outlet at this two-bit triplet solenoid valve is connected with IMR-MS with kapillary sampling pipe by a constant-current device, between kapillary sampling pipe and IMR-MS, be also provided with a two-bit triplet solenoid valve, another outlet of this two-bit triplet solenoid valve is connected with nitrogen back-blowing device, on kapillary sampling pipe, be provided with heating and thermal insulation layer.
4. special-purpose on-line analysis device according to claim 3, is characterized in that: the control flow of described standard constant current hole device can be determined according to actual needs, is generally 1 ~ 10 mL/s.
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