CN-117804954-B - Method for simulating and evaluating interception efficiency of filter tip on particulate matters in smoke

CN117804954BCN 117804954 BCN117804954 BCN 117804954BCN-117804954-B

Abstract

The invention provides a method for simulating and evaluating the interception efficiency of a filter tip on smoke particulate matters, which comprises the steps of firstly extracting particulate matters from smoke generated after a batch of conventional cigarettes are smoked by using a Cambridge filter disc, preparing suspension for later use, preparing aerosol particles by using an aerosol generating device, then taking a new Cambridge filter disc and a filter stick to be tested, recording initial mass, then sucking the prepared aerosol particles by using a smoking machine to intercept the aerosol particles, recording the intercepted mass, recording the mass of captured moisture and ethanol by using a gas chromatography, and finally obtaining the interception efficiency through conversion operation of the masses. The method has the advantages that chemical components and aerosol particles are consistent with the actual cigarette smoke, and the whole evaluation link is simple, efficient and accurate.

Inventors

JIA YUNZHEN
PENG BIN
ZHANG XIAOBING
CHU WENJUAN
CAO YI
ZHOU YI
LIU WEN
NIE CONG
SUN XUEHUI
CHEN YUSONG
GUO JIZHAO
YAN QUANPING
YANG SONG
WANG YIPENG
SUN PEIJIAN

Assignees

中国烟草总公司郑州烟草研究院

Dates

Publication Date: 20260512
Application Date: 20231229

Claims (8)

1. A method for simulating and evaluating the interception efficiency of a filter tip to smoke particulate matters is characterized by comprising the following steps: Step 1), capturing particulate matters in smoke generated after a batch of conventional cigarettes are smoked by adopting a Cambridge filter disc; Step 2) putting the Cambridge filter disc for capturing particulate matters into ethanol solution, soaking, crushing and filtering the materials of the Cambridge filter disc to obtain suspension liquid only containing the particulate matters of the cigarette smoke for later use; Step 3) taking a new Cambridge filter disc, weighing and then loading the new Cambridge filter disc into a single-channel smoking machine, wherein the mass of the Cambridge filter disc is m 1 , weighing a filter rod to be detected with a set length and then inserting the filter rod into a catcher of the single-channel smoking machine, and the mass of the filter rod is m 2 ; step 4) pouring a proper amount of the suspension prepared in the step 2) into an aerosol generating device to generate stable aerosol, wherein an outlet of the aerosol generating device is communicated with a suction inlet of a single-channel smoking machine in a sealing way, and the aerosol is smoked in a standard smoking mode, and the smoking times and frequency are set; after the suction is finished, removing the Cambridge filter disc and the filter tip to be detected, respectively weighing, wherein the mass of the Cambridge filter disc for trapping aerosol particles is recorded as m 3 , and the mass of the filter tip to be detected for trapping the aerosol particles is recorded as m 4 ; Step 6) respectively measuring the content of ethanol and the content of water in the Cambridge filter disc and the filter tip to be measured by adopting a gas chromatography method, wherein the mass of the ethanol in the Cambridge filter disc is denoted as m 5 , the mass of the ethanol in the filter tip to be measured is denoted as m 6 , the mass of the water in the Cambridge filter disc is denoted as m 7 , and the mass of the water in the filter tip to be measured is denoted as m 8 ; step 7) calculating the filter trapping efficiency according to the following formula: η=（m 4 -m 2 -m 6 -m 8 ）/（m 4 -m 2 -m 6 -m 8 +m 3 -m 1 -m 5 -m 7 )x100%.
2. the method for simulating and evaluating the interception efficiency of a filter tip to a smoke particulate matter according to claim 1, wherein in the step 2), 100ml of 50-95% ethanol solution is adopted as the ethanol solution, the soaking time is at least 20 hours, and a filter screen selected for filtering is at least 100 meshes.
3. A method for simulating evaluation of efficiency of filter tip to entrap particulate matters in flue gas according to claim 1 or 2, wherein in step 3), length of filter rod to be tested is set to 25-40mm.
4. A method for simulating the efficiency of filter tip interception of particulate matter of smoke according to claim 3, wherein in step 4), the number of times of suction is set to at least 6 times, and the interval of the frequency of suction is 1s.
5. The method for simulating and evaluating the trapping efficiency of a filter tip on smoke particulate matters according to claim 1,2 or 4, wherein in the step 6), the filter tip to be tested, which is trapped with aerosol, is placed in a processing bottle, isopropanol is added, ultrasonic extraction is performed after sealing is performed, the extraction time is set, the obtained extract is filtered into a chromatographic bottle by using an organic phase filter membrane to be tested, the extract is obtained and tested by adopting the same method by using a Cambridge filter disc, which is trapped with aerosol, and then gas chromatography analysis is performed.
6. The method for simulating and evaluating the entrapment efficiency of the filter tip on the smoke particulate matters according to claim 5, wherein the processing bottle is a50 ml conical bottle, 20ml isopropanol is added, and the ultrasonic extraction is carried out for 30min after sealing.
7. The method for simulating and evaluating the interception efficiency of the filter tip to the particulate matters of the smoke according to claim 5 or 6, wherein the extracting solution after ultrasonic extraction is filtered by adopting an organic phase filter membrane with the thickness of 0.22 um.
8. The method for simulating and evaluating the trapping efficiency of a filter tip on a smoke particulate matter according to claim 7, wherein the analysis conditions of the chromatographic gas phase method are as follows: porpak Q chromatographic column with inner diameter of 1/8 inch and 2m, detector TCD, sample inlet temperature of 250 deg.C, sample inlet volume of 2 μL, no split flow, carrier gas helium, reference gas helium, carrier gas flow rate of 20 mL/min, furnace temperature of 170 deg.C and detector temperature of 250 deg.C.

Description

Method for simulating and evaluating interception efficiency of filter tip on particulate matters in smoke Technical Field The invention relates to the field of cigarette filter interception, in particular to a method for simulating and evaluating the interception efficiency of a filter to smoke particulate matters. Background The filter tip can effectively filter out part of harmful components in cigarette smoke, reduce harm to human body caused by smoking, and is the most widely used cigarette tar reducing means at present, so that the development and the development of special filter tip are widely valued and applied. Cigarette filters are of a wide variety including acetate filters, polypropylene filters, paper filters, special filters, and the like. The research on the interception behavior of the filter tip to the cigarette smoke has important value for the design of the cigarette. One of the main indexes for evaluating the filter effect of the filter tip is the interception amount of harmful ingredients, so that the research on the interception efficiency of the harmful ingredients by different cigarette filters is particularly important. In the development process of the novel filter tip, the filter rate of the filter tip is evaluated, the filter tip is usually required to be sent to a cigarette workshop for a cigarette test, and cigarettes made by the test paper are used as standards for evaluation, so that the period is long, and the development cost is high. The method for detecting the efficiency of the filter tip to the interception of harmful ingredients in the cigarette smoke is used for detecting the filter tip of the cigarette, and only belongs to part of a workshop cigarette test. Therefore, the simulation evaluation method for the filter tip filtration rate is established, and has important application value for the development of the cigarette filter tip. In order to solve the above problems, an ideal technical solution is always sought. Disclosure of Invention The invention aims at overcoming the defects of the prior art, and provides a method for simulating and evaluating the interception efficiency of a filter tip to smoke particle phase matters, wherein the chemical components and aerosol particles are consistent with the actual cigarette smoke, and the whole evaluation link is simple, efficient and accurate. In order to achieve the purpose, the technical scheme adopted by the invention is that the method for simulating and evaluating the interception efficiency of the filter tip to the particulate matters of the smoke comprises the following steps: Step 1), capturing particulate matters in smoke generated after a batch of conventional cigarettes are smoked by adopting a Cambridge filter disc; Step 2) putting the Cambridge filter disc for capturing particulate matters into ethanol solution, soaking, crushing and filtering the materials of the Cambridge filter disc to obtain suspension liquid only containing the particulate matters of the cigarette smoke for later use; Step 3) taking a new Cambridge filter disc, weighing and then loading the new Cambridge filter disc into a single-channel smoking machine, wherein the mass of the Cambridge filter disc is m 1, weighing a filter rod to be detected with a set length and then inserting the filter rod into a catcher of the single-channel smoking machine, and the mass of the filter rod is m 2; step 4) pouring a proper amount of the suspension prepared in the step 2) into an aerosol generating device to generate stable aerosol, wherein an outlet of the aerosol generating device is communicated with a suction inlet of a single-channel smoking machine in a sealing way, and the aerosol is smoked in a standard smoking mode, and the smoking times and frequency are set; after the suction is finished, removing the Cambridge filter disc and the filter tip to be detected, respectively weighing, wherein the mass of the Cambridge filter disc for trapping aerosol particles is recorded as m 3, and the mass of the filter tip to be detected for trapping the aerosol particles is recorded as m 4; Step 6) respectively measuring the content of ethanol and the content of water in the Cambridge filter disc and the filter tip to be measured by adopting a gas chromatography method, wherein the mass of the ethanol in the Cambridge filter disc is denoted as m 5, the mass of the ethanol in the filter tip to be measured is denoted as m 6, the mass of the water in the Cambridge filter disc is denoted as m 7, and the mass of the water in the filter tip to be measured is denoted as m 8; step 7) calculating the filter trapping efficiency according to the following formula: η=（m4-m2-m6-m8）/（m4-m2-m6-m8+m3-m1-m5-m7)x100%. in the step 2), 100ml of 50-95% ethanol solution is adopted as the ethanol solution, the soaking time is at least 20 hours, and the filtering is carried out by adopting a filter screen with at least 100 meshes. In the step 3), the length of the filter rod t