CN104777276A - Method for quickly determining release amount of hydrogen cyanide after tobacco leaves are burnt - Google Patents
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- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 241000208125 Nicotiana Species 0.000 title claims abstract description 71
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000005336 cracking Methods 0.000 claims abstract description 55
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 23
- 239000000779 smoke Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000005206 flow analysis Methods 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 238000004227 thermal cracking Methods 0.000 claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 235000019505 tobacco product Nutrition 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000000391 smoking effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000004445 quantitative analysis Methods 0.000 abstract description 2
- 239000012495 reaction gas Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 25
- 238000012360 testing method Methods 0.000 description 10
- 239000010453 quartz Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 239000012494 Quartz wool Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- ONIBWKKTOPOVIA-BYPYZUCNSA-N L-Proline Chemical compound OC(=O)[C@@H]1CCCN1 ONIBWKKTOPOVIA-BYPYZUCNSA-N 0.000 description 1
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Natural products OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- XKLJHFLUAHKGGU-UHFFFAOYSA-N nitrous amide Chemical compound ON=N XKLJHFLUAHKGGU-UHFFFAOYSA-N 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention belongs to the technical field of cigarette production, and particularly relates to a method for quickly determining the release amount of hydrogen cyanide after tobacco leaves are burnt. The method is a thermal cracking-solvent trapping-flow analysis method and specifically comprises the steps of drying, thermal cracking, solvent trapping, analyzing based on the flow analysis method, calculating and the like. According to the fundamental principle, tobacco leaves are cracked in a cracking instrument, and air serves as the cracking reaction gas; then a headspace bottle filled with a hydrogen cyanide trapping solution is used for absorption, at last, quantitative analysis is conducted on a flow analysis meter, and thus the release amount of hydrogen cyanide in smoke generated after tobacco leaves are burnt can be obtained. According to the method, the release amount of hydrogen cyanide in smoke can be obtained without making tobacco leaves into cigarettes, and thus the advantages of being easy to operate, quick and efficient are achieved. Hence, manpower and material resources can be saved, corresponding detection cost is lowered, working efficiency can be better improved, meanwhile, the method can be well used for improving a cigarette formula, and the smoking quality and safety of tobaccos are improved.
Description
Technical Field
The invention belongs to the technical field of cigarette production, and particularly relates to a method for rapidly measuring the release amount of hydrogen cyanide after tobacco leaf combustion.
Background
With the increasing common attention of society to the smoking and health problems, it is more and more important to reduce the content of harmful components in cigarette smoke. At present, the main harmful substances in the cigarette smoke are generally considered to be carbon monoxide, hydrogen cyanide, nitrosamine, nitrogen oxide, volatile aromatic hydrocarbon and the like. Although the content of hydrogen cyanide in the smoke is very low, the hydrogen cyanide is the most ciliated toxic substance in the smoke, is a very active inhibitor in several respiratory enzymes, and is extremely harmful to human bodies. The hydrogen cyanide in cigarette smoke mainly comes from the conversion of proteins, amino acids and nitrates in tobacco, in particular the pyrolysis of glycine, proline and aminodicarboxylic acid. Hydrogen cyanide is taken as one of seven harmful components of cigarettes in China, and an industrial standard for measuring the hydrogen cyanide in the mainstream smoke of the cigarettes is established.
The tobacco leaves, which are used as the main component of the cigarette, have great influence on the release amount of the hydrogen cyanide in the mainstream smoke of the cigarette, so that the tobacco leaves with lower release amount of the hydrogen cyanide can be used for guiding the cigarette formula to reduce the content of the hydrogen cyanide in the mainstream smoke of the cigarette. However, each finished cigarette is composed of a plurality of tobacco leaves, so if an industry standard method is adopted to measure hydrogen cyanide in mainstream smoke of a single cigarette in each cigarette formula, a large amount of tobacco leaves need to be shredded, rolled, sucked and detected, and a large amount of manpower and material resources are inevitably input, so that actual cigarette research and development and production are influenced. Therefore, it is necessary to establish a universal, convenient and rapid method for measuring the release amount of hydrogen cyanide after the combustion of tobacco leaves.
Disclosure of Invention
The invention aims to provide a method for rapidly measuring the release amount of hydrogen cyanide after tobacco leaf combustion, which can better overcome the defects of complexity, high cost and low efficiency of the conventional method for measuring the release amount of hydrogen cyanide.
The technical scheme adopted by the invention is as follows.
A method for rapidly measuring the release amount of hydrogen cyanide after the combustion of tobacco leaves belongs to a thermal cracking-solvent trapping-flow analysis method; the method specifically comprises the following steps:
(1) drying, namely taking a tobacco leaf sample, drying the tobacco leaf sample in an oven at the temperature of 30-40 ℃ for 1-2 h, then cooling to room temperature, crushing, sieving with a 40-mesh sieve, measuring the water content of the crushed tobacco powder, and sealing for later use; measuring the moisture content of the crushed tobacco powder according to YC/T31-1996 of preparation of samples in tobacco and tobacco products and moisture measurement;
(2) thermal cracking, namely putting the tobacco powder crushed in the step (1) into a quartz tube special for a cracking instrument, filling quartz wool at two ends of the quartz tube, and putting the quartz tube into a cracking gun for cracking analysis;
the specific parameters are as follows:
and (3) cracking the probe: the initial temperature is 10-50 ℃, the heating rate is 5-10 ℃/ms, the final temperature is 300-1000 ℃, the cracking time is 5-30 s, the temperature of a transmission line is 210-280 ℃, and the temperature of a valve box is 200-260 ℃;
preferred cleavage conditions are: the initial temperature is 50 ℃, the heating rate is 10 ℃/ms, the final temperature is 800 ℃, the cracking time is 5s, the transmission line temperature is 280 ℃, and the valve box temperature is 260 ℃;
(3) collecting a solvent, namely adding 10mL of hydrogen cyanide collecting solution into a headspace bottle, sealing the headspace bottle with a headspace bottle cap, inserting an exhaust needle on the headspace bottle cap, and not inserting the collecting solution into the lower end of the exhaust needle; completely inserting a transmission line needle of the cracking instrument into the hydrogen cyanide trapping solution of the headspace bottle to absorb hydrogen cyanide in the cracked substance, wherein the distance between the transmission line needle and the bottom of the absorption bottle is about 5 mm; after the thermal cracking is started, the needle head of the transmission line is kept in the hydrogen cyanide trapping solution for 5-15 min, preferably 10 min;
the hydrogen cyanide trapping solution is 0.01mol/L sodium hydroxide aqueous solution;
(4) analyzing by a flow analysis method; measuring the hydrogen cyanide in the hydrogen cyanide trapping solution in the step (3) by using a flow analyzer, wherein the analysis parameters of the flow analyzer are carried out according to a continuous flow method for measuring the hydrogen cyanide in the mainstream smoke of the YC/T253-2008 cigarette;
after the measurement is finished, the release amount of hydrogen cyanide after the tobacco leaves are burnt is calculated according to the following formula:
S=C×V/[M×（1－X）]；
wherein, S: the release amount of hydrogen cyanide after the tobacco leaves are burnt is unit of mu g/g; c: the concentration of hydrogen cyanide in the hydrogen cyanide trapping solution is unit of mug/mL; v: adding the volume of the hydrogen cyanide trapping solution mL into the headspace bottle; m: adding the mass g of the tobacco powder into a quartz tube special for a cracking instrument; x: the moisture content of tobacco leaves (moisture content of tobacco powder after drying and grinding).
The method for measuring the release amount of hydrogen cyanide after the combustion of the tobacco leaves, provided by the invention, has the following basic principle: firstly, cracking tobacco leaves in a cracking instrument, wherein the cracking reaction gas is air; then inserting a needle head of the transmission line of the cracking instrument into a headspace bottle filled with the hydrogen cyanide trapping solution, and absorbing the hydrogen cyanide trapping solution by using the headspace bottle; and finally, directly carrying out quantitative analysis on the hydrogen cyanide trapping solution on a flow analyzer so as to obtain the release amount of the hydrogen cyanide in the flue gas after the tobacco leaves are combusted. The method has the advantages of simple operation, high speed and high efficiency because the tobacco leaves are not required to be made into cigarettes and then the release amount of the hydrogen cyanide in the smoke is measured, thereby saving manpower and material resources, reducing the corresponding detection and preparation cost, being beneficial to improving the working efficiency, being better used for improving and improving the cigarette formula work and improving the smoking quality and the safety of the tobacco.
Detailed Description
The present invention is further illustrated by the following examples.
Before describing the embodiments, a part of the apparatus, test drugs and medicines used in the present invention will be briefly described as follows.
Test drugs:cyanide ion standard, national institute of metrology science;
sodium hydroxide, national pharmaceutical group chemical agents ltd;
a hydrogen cyanide capturing solution, 0.01mol/l aqueous sodium hydroxide solution.
Tobacco leaf sample:yield number C of Flat-topped mountain area of 20133F, tobacco leaf samples provided by Henan Zhongyan GmbH;
the test instrument:CDS 5200 cracker, CDS corporation, usa;
AA3 continuous flow Analyzer, Bran lueebbe, germany;
binder oven, German Bindd;
XS 225ASCS model electronic balance, sensitivity 0.0001g, Precise, Switzerland;
Milli-Q50 ultra pure water treatment apparatus, 0.45 μm water phase membrane filter, Millipore corporation, USA;
XF-98B cyclone precision grinder, Happy electromechanical instrument factory of yellow Ye city.
Example 1
The invention provides a method for rapidly measuring the release amount of hydrogen cyanide after tobacco leaf combustion, belonging to a thermal cracking-solvent trapping-flow analysis method; the method specifically comprises the following steps:
(1) drying, namely drying 50g of tobacco leaf samples in a drying oven at 40 ℃ for 2h, cooling to room temperature, crushing, sieving with a 40-mesh sieve, measuring the water content of the crushed tobacco powder, and sealing for later use; the moisture content of the pulverized tobacco powder was measured according to "preparation of sample in tobacco and tobacco products and moisture measurement oven method YC/T31-1996".
(2) Thermal cracking, namely accurately weighing 0.015g (accurate to 0.0001 g) of the tobacco powder crushed in the step (1) into a quartz tube special for a cracking instrument, filling quartz wool at two ends of the quartz tube, and loading the quartz tube into a cracking gun for cracking analysis;
the specific parameters are as follows:
the cracking conditions are as follows: the initial temperature is 50 ℃, the heating rate is 10.00 ℃/ms, the final temperature is 800 ℃, the cracking time is 5s, the transmission line temperature is 280 ℃, and the valve box temperature is 260 ℃.
(3) Trapping a solvent, namely adding 10mL of hydrogen cyanide trapping solution into a 20mL headspace bottle, sealing the headspace bottle with a headspace bottle cap, inserting an injection needle as an exhaust needle on the headspace bottle cap for exhausting, and not inserting the trapping solution into the lower end of the exhaust needle; completely inserting a transmission line needle of the cracking instrument into the hydrogen cyanide trapping solution of the headspace bottle to absorb hydrogen cyanide in the cracked substance, wherein the distance between the transmission line needle and the bottom of the absorption bottle is about 5 mm; after the thermal cracking was started, the transfer line needle was kept in the hydrogen cyanide trapping solution for 10 min.
(4) Analyzing by a flow analysis method; measuring the hydrogen cyanide in the hydrogen cyanide trapping solution in the step (3) by using a flow analyzer, wherein the analysis parameters of the flow analyzer are carried out according to a continuous flow method for measuring the hydrogen cyanide in the mainstream smoke of the YC/T253-2008 cigarette;
after the measurement is finished, the release amount of hydrogen cyanide after the tobacco leaves are burnt is calculated according to the following formula:
S=C×V/[M×（1－X）]；
wherein, S: the release amount of hydrogen cyanide after the tobacco leaves are burnt is unit of mu g/g; c: the concentration of hydrogen cyanide in the hydrogen cyanide trapping solution is unit of mug/mL; v: adding the volume of the hydrogen cyanide trapping solution mL into the headspace bottle; m: adding the mass g of the tobacco powder into a quartz tube special for a cracking instrument; x: the moisture content of the tobacco leaves (i.e. the moisture content of the dried tobacco powder).
The calculation result shows that: the release amount of hydrogen cyanide after the tobacco leaves are burnt is 90.23 mug/g.
In order to test the reliability of the method provided by the invention on the determination of the release amount of the hydrogen cyanide, the inventor simultaneously performed 7 parallel tests on the same batch of tobacco leaves, and the results of the 7 measurements are shown in the following table.
As can be seen from the data in the table above, the coefficient of variation of the 7 parallel tests is 1.44%, which better indicates that the method for releasing the amount of hydrogen cyanide after the combustion of the tobacco leaves provided by the invention has better reproducibility, i.e. better stability.
It is emphasized and explained that the method for rapidly determining the release amount of hydrogen cyanide after the combustion of the tobacco leaves, provided by the invention, mainly provides a trend guidance for the work of controlling the release amount of hydrogen cyanide when the tobacco leaves are selected according to a cigarette formula, namely, the tobacco leaves with different release amounts are reasonably matched, so that the optimal combination matching is provided, and the tobacco leaf combination with the best effect is obtained. Because the method mainly provides trend guidance work for the hydrogen cyanide release amount, the measured result is different from that of an industry standard hydrogen cyanide release amount measuring method, theoretically, the measured result of the measuring method provided by the invention is the release amount of the hydrogen cyanide in the whole smoke, and the measured result of the industry standard method is the release amount of the hydrogen cyanide in the mainstream smoke, so that the measured value of the hydrogen cyanide release amount of the measuring method provided by the invention is higher than that of the industry standard method, but for the tobacco leaf samples of the same batch, the trend of the hydrogen cyanide release amount is consistent no matter which method is adopted, and the method still has more positive and practical values.
Examples 2 to 14
To determine the optimal cracking temperature and cracking time, the inventors further conducted experiments. Briefly described as follows.
Examples 2 to 9 the method for measuring the amount of hydrogen cyanide released after the combustion of tobacco leaves was the same as in example 1, i.e., the cracking time was 5 seconds,
the cracking temperature was adjusted only, and the data of the cracking temperature and the final amount of released hydrogen cyanide measured for each example are shown in the following table.
As can be seen from the data in the table above, the maximum hydrogen cyanide release is obtained at a cracking temperature of 800 ℃ for a fixed cracking time, and thus the optimum cracking temperature.
In examples 10 to 14, the method for measuring the amount of released hydrogen cyanide after the combustion of tobacco leaves is the same as in example 1, namely, the cracking temperature is 800 ℃, only the cracking time is adjusted, and the specific data of the cracking time and the final amount of released hydrogen cyanide of each example are shown in the following table.
As can be seen from the data in the above table, the maximum hydrogen cyanide release was obtained at a cracking time of 5s at a fixed cracking temperature, and this was the optimum cracking time.
In summary, the cracking parameters in example 1 are the optimal cracking conditions through the screening experiments of the cracking temperature and the cracking time, respectively.
It should be noted that, in order to verify the stability and reliability of the cracking system provided by the present invention and ensure that the cracking system does not have residual hydrogen cyanide after a series of tests, thereby affecting the determination of the final amount of released hydrogen cyanide, the inventor performed the determination of the amount of residual hydrogen cyanide on the cracking system after 10 consecutive times of cracking of the tobacco powder sample. The method specifically comprises the following steps: after 10 times of continuous cracking of the tobacco powder sample, a blank test is carried out on the cracking system by using a blank quartz tube, the related experimental parameter setting is set by referring to example 1, and the determination result shows that the content of hydrogen cyanide is not detected, which shows that the cracking system provided by the invention has no hydrogen cyanide gas residue and can carry out better continuous and repeated tests.
In addition, the inventors conducted additional experiments in order to ensure that the capacity of the hydrogen cyanide trapping solution in the headspace bottle was sufficient to completely absorb the released hydrogen cyanide gas. The method specifically comprises the following steps: when a tobacco powder sample is subjected to a cracking experiment, two headspace bottles are arranged in series, wherein the volumes of hydrogen cyanide trapping solutions contained in the first headspace bottle are respectively 5mL, 10mL and 15mL, and the volume of hydrogen cyanide trapping solution contained in the second headspace bottle is 10 mL; relevant experimental parameter settings reference example 1. After the test was completed, the hydrogen cyanide content absorbed in the second headspace bottle was determined. The results showed that no hydrogen cyanide gas was detected in the second headspace bottle even though the volume of hydrogen cyanide trapping solution contained in the first headspace bottle was 5 mL. Therefore, in order to ensure complete absorption of hydrogen cyanide, 10mL of the hydrogen cyanide trapping solution contained in the headspace bottle was sufficient.
Claims (3)
1. A method for rapidly measuring the release amount of hydrogen cyanide after the combustion of tobacco leaves is characterized in that the method belongs to a thermal cracking-solvent trapping-flow analysis method; the method specifically comprises the following steps:
(1) drying, namely taking a tobacco leaf sample, drying for 1-2 h in an oven at 30-40 ℃, cooling to room temperature, crushing, measuring the water content of the crushed tobacco powder, and sealing for later use; measuring the moisture content of the crushed tobacco powder according to YC/T31-1996 of preparation of samples in tobacco and tobacco products and moisture measurement;
(2) carrying out thermal cracking, namely, taking the crushed tobacco powder in the step (1) to carry out cracking analysis in a cracking instrument;
the specific parameters are as follows:
and (3) cracking the probe: the initial temperature is 10-50 ℃, the heating rate is 5-10 ℃/ms, the final temperature is 300-1000 ℃, the cracking time is 5-30 s, the temperature of a transmission line is 210-280 ℃, and the temperature of a valve box is 200-260 ℃;
(3) collecting a solvent, namely adding a hydrogen cyanide collecting solution into a headspace bottle; inserting a transmission line needle of the cracking instrument into the hydrogen cyanide trapping solution of the headspace bottle for absorption; after the thermal cracking is started, the transmission line needle is kept in the hydrogen cyanide trapping solution for 5-15 min;
(4) analyzing by a flow analysis method; measuring the concentration of the hydrogen cyanide in the hydrogen cyanide trapping solution in the step (3) by using a flow analyzer, wherein the analysis parameters of the flow analyzer are carried out according to a continuous flow method for measuring the hydrogen cyanide in the mainstream smoke of the YC/T253-2008 cigarette;
after the measurement is finished, the release amount of hydrogen cyanide after the tobacco leaves are burnt is calculated according to the following formula:
S=C×V/[M×（1－X）]；
wherein,
s: the release amount of hydrogen cyanide after the tobacco leaves are burnt is unit of mu g/g;
c: the concentration of hydrogen cyanide in the hydrogen cyanide trapping solution is unit of mug/mL;
v: adding the volume of the hydrogen cyanide trapping solution mL into the headspace bottle;
m: adding the mass g of the tobacco powder into a cracking instrument;
x: the water content of tobacco leaf, i.e. the water content of dried and pulverized tobacco powder.
2. The method for rapidly determining the release amount of the hydrogen cyanide after the combustion of the tobacco leaves according to claim 1, wherein the cracking parameters in the step (2) are as follows: the initial temperature is 50 ℃, the heating rate is 10 ℃/ms, the final temperature is 800 ℃, the cracking time is 5s, the transmission line temperature is 280 ℃, and the valve box temperature is 260 ℃.
3. The method for rapidly determining the release amount of hydrogen cyanide after the combustion of tobacco leaves according to claim 1, wherein the hydrogen cyanide capturing solution in the step (3) is a 0.01mol/L aqueous sodium hydroxide solution; the adding amount of the hydrogen cyanide trapping solution in the headspace bottle is 10 mL; after thermal cracking began, the transfer line needle was held in the hydrogen cyanide capture solution for 10 min.
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Address after: 450000 Yulin South Road, Henan, Zheng Dong, No. 16 South Road, Zhengzhou Applicant after: China Tobacco Henan Industrial Co., Ltd. Address before: 450000 Zhengzhou agricultural road, Henan, No. 29 Applicant before: China Tobacco Henan Industrial Co., Ltd. |
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Application publication date: 20150715 |