CN108490097A - A kind of detection method of the volatile organic compounds burst size of nanometer of filter tip - Google Patents

Abstract

The invention relates to a method for detecting the release of volatile organic compounds from a nano filter, comprising the following steps: step (1), determining the number of suction ports; step (2), setting the temperature of the required heating chamber according to the number of suction ports ; Step (3), suction; Step (4), component analysis in the nano-filter. The invention avoids complex background interference, and the precision and accuracy of the measurement results are significantly improved. The invention has the advantages of simple structure, convenient operation and reduced influence of complex smoke, and can be used as a new analysis method for the emission of volatile organic compounds of the nanometer filter.

Description

A method for detecting the emission of volatile organic compounds from nano-filters

technical field

The invention relates to a method for detecting the release amount of volatile organic compounds, in particular to a method for detecting the release amount of volatile organic compounds of a nano-filter, and belongs to the field of physical and chemical inspection of cigarette auxiliary materials.

Background technique

Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to volatile compounds with a boiling point between 50 and 260 °C and a saturated vapor pressure exceeding 133.32 Pa at room temperature. The existence of volatile organic compounds not only poses safety risks, but also has adverse effects on the smoking quality of cigarettes when the content is too high. therefore. Quantitative analysis of volatile organic compounds in filters is of great significance both in safety evaluation and quality control.

At present, the test method for the migration of the added components of the nano-filter into the cigarette smoke usually uses a smoking machine to suck the cigarette, and then capture the components of the smoke for analysis. Due to the very complex background generated when the cigarette is burned, it will seriously interfere with the determination of the migration components of the nano-filter, the determination of its components is very difficult, and the error of the analysis results is also very large. How to truly and accurately analyze and detect the safety components of nano-filters has become the focus of tobacco analysis research.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for detecting the emission of volatile organic compounds from nano-filters.

The object of the invention is achieved through the following technical solutions:

A method for detecting the emission of volatile organic compounds from a nano-filter, characterized in that:

Including the following steps:

Step (1), determine the number of suction ports

Insert a temperature measuring probe at the starting part of the far lip end of the cigarette to be tested that contains nano-filters, smoke on a conventional smoking machine, and use the temperature-measuring probe to measure the smoke that passes through the starting part of the nano-filter during each puff. temperature and determine the number of puffs for the whole cigarette;

Step (2), set the temperature of the required heating chamber according to the number of suction ports

Set the air temperature in several heating chambers of the detection device according to the actual smoking temperature of the cigarette, and set the number of suction ports, the number of suction ports is 7-8, and the air temperature is 36-51°C;

Step (3), suction

Connect the smoking machine, the smoke trap and the filter holder in sequence, remove the filter tip of the nano-filter cigarette from the cigarette, install it on the filter rod holder, start the smoking machine and smoke according to the standard conditions. The air sucked comes from heating chambers of different temperatures, which are switched in turn according to the number of suction ports. The temperature of the airflow through the filter tip is consistent with the actual airflow temperature of the cigarette smoking machine; the smoke trap adopts triethylamine- The mixed solution of methanol is used to capture the air flow;

Step (4), component analysis

Headspace-gas-gas analysis was performed on the trapping fluid.

Further, a detection device for release of aromatic amines is used for detection, the detection device includes several heating chambers, one end of the heating chamber is connected to the air inlet, and the other end is connected to the air outlet pipe, the air outlet pipe is arranged around the turntable, and the first air inlet pipe is included on the turntable , the first air intake pipe rotates with the turntable, one end of the first air intake pipe communicates with one of the air outlet pipes at a certain moment, the other end of the first air intake pipe communicates with one end of the second air intake pipe, the second air intake pipe is fixed, and the other end is connected with the filter The holder is connected, the filter holder is connected with the smoke trap, and the smoke catcher is connected with the smoking machine.

Further, there are 10 heating chambers, each of which is equipped with a temperature regulating device, and the heating temperature range is 30-200°C.

Further, in step (4), chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column; carrier gas: helium; injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column temperature Oven temperature 40 °C; carrier gas flow rate 1 ml/min; temperature program: keep at 40 °C for 6 min, then increase to 160 °C at a rate of 10 °C/min, maintain for 3 min, and finally increase at a rate of 20 °C/min to 220°C, keep for 3 minutes.

Further, in step (4), mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 °C, ion source temperature 240 °C, solvent delay time 3 min, scan range: m/z 40.0-200.0.

Further, in step (3), the amount of triethylamine used is 50 ml, and the amount of methanol used is 20 ml.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The detection device of the present invention is equipped with several heating chambers and different temperatures, which can improve the suction temperature of the human oral cavity, avoiding the situation that the conventional temperature cannot truly reflect the suction temperature of the oral cavity, and is equipped with a turntable, which is easy to operate , easy to switch, reducing the influence of complex flue gas, making the determination of volatile organic compounds very easy.

(2) The present invention adopts purified air flow for elution, which eliminates the background interference of complex smoke components generated in the actual cigarette burning process, significantly improves the precision and accuracy of the measurement results, and shortens the test period by about 15 minutes.

(3) Simple headspace or solvent extraction can be used for direct analysis; it avoids the complicated sample purification and enrichment operations in the analysis and detection of conventional nano-filter component migration to flue gas.

Description of drawings

Fig. 1 is the structural representation of detection device of the present invention;

In Figure 1: I is the turntable; II is the filter holder; III is the smoke trap; IV is the smoking machine; V is the air inlet;

1-the first communication port, 1'-the first heating chamber; 2-the second communication port, 2'-the second heating chamber; 3-the third communication port, 3'-the third heating chamber; 4-the fourth communication 4'-the fourth heating chamber; 5-the fifth communication port, 5'-the fifth heating chamber; 6-the sixth communication port, 6'-the sixth heating chamber; 7-the seventh communication port, 7'- Seventh heating chamber; 8-eighth communication port, 8'-eighth heating chamber; 9-ninth communication port, 9'-ninth heating chamber; 10-tenth communication port, 10'-tenth heating chamber; 11-the first air intake pipe; 12-the second air intake pipe.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but the present invention is not limited in any way, and any changes or improvements based on the teachings of the present invention fall within the protection scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The materials or equipment used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.

Example 1

The detection device for the emission of volatile organic compounds in this embodiment includes a first heating chamber 1', a second heating chamber 2', a third heating chamber 3', a fourth heating chamber 4', a fifth heating chamber 5', The sixth heating chamber 6', the seventh heating chamber 7', the eighth heating chamber 8', the ninth heating chamber 9', and the tenth heating chamber 10', one end of each heating chamber is connected to the air inlet, and the other end is connected to the outlet The air pipe and the air outlet pipe are arranged around the turntable 1 to form the first communication port 1, the second communication port 2, the third communication port 3, the fourth communication port 4, the fifth communication port 5, and the sixth communication port 6 arranged around the turntable 1. , the seventh communication port 7, the eighth communication port 8, the ninth communication port 9, the tenth communication port 10, the first air intake pipe 11 is included on the rotating disk 1, and the first air intake pipe 11 rotates with the rotating disk 1, and the first air intake pipe 11 One end communicates with one of the communication ports at a certain moment, the other end of the first air intake pipe 11 communicates with one end of the second air intake pipe 12, the second air intake pipe 12 is fixed, and the other end of the second air intake pipe 12 is connected to the filter holder II , the filter holder II is connected to the smoke trap III, the smoke trap III is connected to the smoking machine IV, an air intake pipe can be arranged at one end of the air inlet, and one end of the air intake pipe is connected to the air inlet V.

The heating chamber is equipped with a temperature regulating device, and the heating temperature range is 30-200°C. There is an electronic heating component on the heating chamber, which can quickly heat the air in the chamber to the specified temperature and control the temperature precisely.

The turntable and the smoking machine are connected with the control system, and the control system controls the automatic rotation and switching of the turntable, and is consistent with the cigarette smoking process of the smoking machine, that is, when the first puff is taken, the first communication port communicates with the first intake pipe 11; When the second port is used, switch to the second communication port so that the second communication port communicates with the first air intake pipe 11; When switching, the outside air will not directly enter the first air intake pipe, and the air in the entire suction process comes from each heating chamber, which highly simulates human smoking.

The filter rod holder is a filter tip holder with adjustable circumference, and its circumference can be adjusted to meet all the circumference specifications of commercially available cigarettes. The smoke trap is a Cambridge filter. The gas paths between all components are metal or glass heat-insulated pipelines.

Use the above-mentioned detection device to detect the emission of volatile organic compounds, as follows:

Artificially add No. 1 nano-filter to cigarette A, insert a temperature-measuring probe at the beginning of the nano-filter, smoke it on an ordinary smoking machine, measure the starting point of each puff through the nano-filter through the temperature-measuring probe Determine the temperature of the smoke at the starting point and determine the number of puffs for the entire cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 36.5 ℃), heating chamber 2' (second port 37.9 ℃), Heating chamber 3' (third port 41.2 ℃), heating chamber 4' (fourth port 43.8 ℃), heating chamber 5' (fifth port 45.1 ℃), heating chamber 6' (sixth port 46.7 ℃), heating chamber 7' (7th port 48.4 ℃), heating chamber 8' (eighth port 50.3 ℃). Set the number of suction ports to 8 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when you take the first mouthful, the hot air in the first heating chamber passes through the filter rod; then Switching through the turntable, when sucking the second port, the hot air in the second heating chamber passes through the filter rod, and so on, switching in turn according to the number of ports. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column; injection volume 3 μL; inlet temperature 220 ℃; split ratio 15:1; column oven temperature 40 ℃; carrier gas flow rate 1 ml/min; temperature program : Keep from 40°C for 6 minutes, then increase to 160°C at a rate of 10°C/min, hold for 3 minutes, and finally increase to 220°C at a rate of 20°C/min, and hold for 3 minutes.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

The analysis results are shown in Table 1.

Example 2

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 2 nano-filters to B cigarettes, insert a temperature measuring probe at the beginning of the nano-filters, smoke on an ordinary smoking machine, and use the temperature-measuring probe to measure the start of each puff through the nano-filters The temperature of the smoke at the site and determine the number of puffs for the whole cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the device, temperature heating chamber 1' (first port 35.4°C), heating chamber 2' (second port 36.5°C), Chamber 3' (third port 40.1 ℃), heating chamber 4' (fourth port 41.5 ℃), heating chamber 5' (fifth port 43.6 ℃), heating chamber 6' (sixth port 45.2 ℃), heating chamber 7 ' (7th mouth 47.1 ℃). Set the number of suction ports to 7 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when you take the first mouthful, the hot air in the first heating chamber passes through the filter rod; then Switching through the turntable, when sucking the second port, the hot air in the second heating chamber passes through the filter rod, and so on, switching in turn according to the number of ports. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted after the suction is over.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Example 3

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 3 nano-filter to cigarette C, insert a temperature-measuring probe at the beginning of the nano-filter, smoke it on an ordinary smoking machine, measure the starting point of each puff through the nano-filter through the temperature-measuring probe Determine the temperature of the smoke at the starting point and determine the number of puffs for the entire cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 36.5 ℃), heating chamber 2' (second port 37.9 ℃), Heating chamber 3' (third port 41.2 ℃), heating chamber 4' (fourth port 43.8 ℃), heating chamber 5' (fifth port 45.1 ℃), heating chamber 6' (sixth port 46.7 ℃), heating chamber 7' (7th port 48.4 ℃), heating chamber 8' (eighth port 50.3 ℃). Set the number of suction ports to 8 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when the first puff is taken, the hot air in the heating chamber of the first puff passes through the filter rod; Then switch through the turntable, when the second port is sucked, the hot air in the second heating chamber passes through the filter rod, and so on, switching in turn according to the number of ports. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted after the suction is over.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Example 4

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 4 nano-filters to D cigarettes, insert a temperature-measuring probe at the beginning of the nano-filters, smoke on an ordinary smoking machine, and use the temperature-measuring probes to measure the smoke that passes through the nano-filters during each puff. temperature and determine the number of puffs for the entire cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 35.4 °C), heating chamber 2' (second port 36.5 °C), Heating chamber 3' (third port 40.1 ℃), heating chamber 4' (fourth port 41.5 ℃), heating chamber 5' (fifth port 43.6 ℃), heating chamber 6' (sixth port 45.2 ℃), heating chamber 7' (7th port 47.1 °C). Set the number of suction ports to 7 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when you take the first mouthful, the hot air in the first heating chamber passes through the filter rod; then Switching through the turntable, when the second port is sucked, the hot air in the second heating chamber passes through the filter rod, and so on, and the number of ports is switched in turn. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted after the suction is over.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Example 5

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 5 nano-filters to E cigarettes, insert a temperature-measuring probe into the part where the nano-filters are installed, smoke on an ordinary smoking machine, and use the temperature-measuring probe to measure the amount of smoke that passes through the nano-filters during each puff. temperature, and determine the number of puffs taken throughout the cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 36.5 ℃), heating chamber 2' (second port 37.9 ℃), Heating chamber 3' (third port 41.2 ℃), heating chamber 4' (fourth port 43.8 ℃), heating chamber 5' (fifth port 45.1 ℃), heating chamber 6' (sixth port 46.7 ℃), heating chamber 7' (7th port 48.4 ℃), heating chamber 8' (eighth port 50.3 ℃). Set the number of suction ports to 8 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when you take the first mouthful, the hot air in the first heating chamber passes through the filter rod; then Switching through the turntable, when the second port is sucked, the hot air in the second heating chamber passes through the filter rod, and so on, and the number of ports is switched in turn. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted after the smoke is finished.

The simulated gas flow is captured by a mixed solution of 50ml triethylamine-20ml methanol. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Example 6

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 6 nano-filter to F cigarette, insert a temperature-measuring probe at the beginning of the nano-filter, smoke on an ordinary smoking machine, and use the temperature-measuring probe to measure the smoke that passes through the nano-filter during each puff. temperature and determine the number of puffs for the entire cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 35.4 °C), heating chamber 2' (second port 36.5 °C), Heating chamber 3' (third port 40.1 ℃), heating chamber 4' (fourth port 41.5 ℃), heating chamber 5' (fifth port 43.6 ℃), heating chamber 6' (sixth port 45.2 ℃), heating chamber 7' (7th port 47.1 °C). Set the number of suction ports to 7 in total.

Remove the nano-filter from the cigarette, install it on the filter rod holder, start the smoking machine to smoke according to the standard conditions, and when you take the first mouthful, the hot air in the first heating chamber passes through the filter rod; then Switching through the turntable, the hot air in the second heating chamber passes through the filter rod when sucking the second port, and so on, switching in turn according to the number of ports. The air flow through the filter simulates the smoke flow when the cigarette is smoked, and the nano-filter components are eluted after the smoke is finished.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Example 7

The detection device of the present embodiment is the same as that of Example 1, and the above-mentioned detection device is used to detect the emission of volatile organic compounds, as follows:

Artificially add No. 7 nano-filters to G cigarettes, insert a temperature-measuring probe into the initial part equipped with nano-filters, smoke on an ordinary smoking machine, and measure the starting point of each puff through the nano-filters through the temperature-measuring probe. Determine the temperature of the smoke at the starting point and determine the number of puffs for the entire cigarette.

According to the measured suction temperature and the number of suction ports, set the air temperature in the air heating chamber in the simulation device, temperature heating chamber 1' (first port 36.5 ℃), heating chamber 2' (second port 37.9 ℃), Heating chamber 3' (third port 41.2 ℃), heating chamber 4' (fourth port 43.8 ℃), heating chamber 5' (fifth port 45.1 ℃), heating chamber 6' (sixth port 46.7 ℃), heating chamber 7' (7th port 48.4 ℃), heating chamber 8' (eighth port 50.3 ℃). Set the number of suction ports to 8 in total.

Remove the filter tip of the nano-filter cigarette from the cigarette, install it on the filter rod holder, start the smoking machine and smoke according to the standard conditions. the hot air in the second heating chamber; and then switch through the turntable. When the second port is sucked, the hot air in the second heating chamber passes through the filter rod, and so on, switching in turn according to the number of ports. The air flow through the filter simulates the smoke flow when the cigarette is smoked. After the suction is completed, the nano-filter components are eluted.

A 50ml triethylamine-20ml methanol mixed solution was used to capture the gas flow. Headspace-gas-gas analysis was performed on the trapping fluid.

Chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column. Injection volume 3 μL; inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; The rate was increased to 160 °C and maintained for 3 min, and finally increased to 220 °C at a rate of 20 °C/min and maintained for 3 min.

Mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transfer line temperature 200 ℃, ion source temperature 240 ℃, solvent delay time 3 min, scan range: m/z 40.0-200.0.

All the other are identical with embodiment 1, analysis result is as shown in table 1.

Table 1 VOCs analysis results

It can be seen from Table 1 that the device and method of this embodiment can effectively improve the accuracy of the analysis results of the release of volatile organic compounds in the nano-filter, improve the analysis sensitivity of the sample, and the sample is not affected by complex smoke, and the real It reflects the composition of volatile organic compounds in the filter, has a short detection period, and has the value of popularization and application.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. A method for detecting the release of volatile organic compounds from a nano-filter, characterized in that: comprising the steps: Step (1), determine the number of suction ports Insert a temperature measuring probe at the starting part of the far lip end of the cigarette to be tested that contains nano-filters, smoke on a conventional smoking machine, and use the temperature-measuring probe to measure the smoke that passes through the starting part of the nano-filter during each puff. temperature and determine the number of puffs for the whole cigarette; Step (2), set the temperature of the required heating chamber according to the number of suction ports Set the air temperature in several heating chambers of the detection device according to the actual smoking temperature of the cigarette, and set the number of suction ports, the number of suction ports is 7-8, and the air temperature is 36-51°C; Step (3), suction Connect the smoking machine, the smoke trap and the filter holder in sequence, remove the filter tip of the nano-filter cigarette from the cigarette, install it on the filter rod holder, start the smoking machine and smoke according to the standard conditions. The air sucked comes from heating chambers of different temperatures, which are switched in turn according to the number of suction ports. The temperature of the airflow through the filter tip is consistent with the actual airflow temperature of the cigarette smoking machine; the smoke trap adopts triethylamine- The mixed solution of methanol is used to capture the air flow; Step (4), component analysis Headspace-gas-gas analysis was performed on the trapping fluid. 2. The detection method according to claim 1, characterized in that: a detection device for release of aromatic amine is used for detection, the detection device includes several heating chambers, one end of the heating chamber is connected to the air inlet, and the other end is connected to the air outlet pipe, The air outlet pipe is arranged around the turntable, and the turntable includes a first air inlet pipe, which rotates with the turntable, and one end of the first air inlet pipe communicates with one of the air outlet pipes at a certain moment, and the other end of the first air inlet pipe connects with one end of the second air inlet pipe. The second air intake pipe is fixed, the other end is connected with the filter holder, the filter holder is connected with the smoke trap, and the smoke catcher is connected with the smoking machine. 3. The detection method according to claim 1, characterized in that there are 10 heating chambers, each of which is equipped with a temperature adjustment device, and the heating temperature range is 30-200°C. 4. The detection method according to claim 1, characterized in that: in step (4), chromatographic conditions: 60 m×0.32 mm×1 μm DB-5MS column; carrier gas: helium; injection volume 3 μL; injection Inlet temperature 220 °C; split ratio 15:1; column oven temperature 40 °C; carrier gas flow rate 1 ml/min; temperature program: keep from 40 °C for 6 min, then increase to 160 °C at a rate of 10 °C/min, keep 3 min, and finally increased to 220 °C at a rate of 20 °C/min and kept for 3 min. 5. The detection method according to claim 1, characterized in that: in step (4), mass spectrometry conditions: ionization mode EI, ionization energy 70 eV, transmission line temperature 200 °C, ion source temperature 240 °C, solvent delay time 3 min , Scanning range: m/z40.0-200.0. 6. The detection method according to claim 1, characterized in that: in step (3), the amount of triethylamine used is 50 ml, and the amount of methanol used is 20 ml.