CN103760061B - A kind of evaluation method of humidity preservation property of cigarette - Google Patents
A kind of evaluation method of humidity preservation property of cigarette Download PDFInfo
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- CN103760061B CN103760061B CN201410051706.0A CN201410051706A CN103760061B CN 103760061 B CN103760061 B CN 103760061B CN 201410051706 A CN201410051706 A CN 201410051706A CN 103760061 B CN103760061 B CN 103760061B
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Abstract
The invention discloses a kind of evaluation method of humidity preservation property of cigarette, the method is at a certain temperature by setting up the graph of a relation of cigarette equilibrium moisture content and envionmental humidity, with envionmental humidity as independent variable, the equilibrium moisture content of Cigarette is dependent variable, onset index matched curve(Y: equilibrium moisture content, T: envionmental humidity), with coefficient b1Represent the humid keeping performance of cigarette, simple to operate, the most convenient.The present invention is the humidity preservation property of cigarette test and evaluation methodology that a kind of automaticity is high, Temperature and Humidity Control level is high and testing efficiency is high.
Description
Technical field
The present invention relates to technical field of tobacco, be specifically related to a kind of evaluation method of humidity preservation property of cigarette.
Background technology
Flavouring humectation is one of industry key special subjects, in recent years, has carried out a series of scientific research in this special project
Work, has particularly carried out some humid keeping performance method of testings and the research of appraisement system in industry.But
It is that humid keeping performance test and evaluation before are primarily directed to Nicotiana tabacum L., and the humectation about Cigarette is studied then
Report less.Part research is when relating to Medicated cigarette humid keeping performance, after also simply being peeled off from cigarette by tobacco shred again
It is analyzed.Although this analysis method can partly understand the humid keeping performance of Medicated cigarette, but have ignored cigarette paper
Effect and the accumulation form of tobacco shred may be on the impact of cigarette humid keeping performance.Therefore, industry needs foundation badly
A kind of evaluation methodology of the humid keeping performance of direct evaluating cigarette cigarette.
Measuring humid keeping performance with the main method evaluated is to put into tobacco sample to fill variable concentrations sulphuric acid
In the exsiccator of (regulation different humidity), or the climatic chamber (laboratory) under certain temperature and humidity conditions
In, periodically sampling weighing, mass transitions weighing drawn becomes moisture content and draws out moisture content-time pass
It is that curve chart compares.The humid keeping performance of Nicotiana tabacum L. or humectant can be carried out fixed intuitively by the method
Property describe, but quantitative assessment cannot be given, and sampling process can interfere with stablizing residing for tobacco sample
Permanent humidity environment.Additionally, the moisture content-time curve difference of a lot of tobacco samples is the least, sometimes
There is intersection, it is impossible to directly utilize moisture content-time history to judge the quality of humectation effect.
CN201517986U develops a set of method utilizing glove box to measure tobacco moisture percentage, and the method is kept away
Exempt from the sampling process impact on stablizing humiture environment residing for tobacco sample, the tobacco moisture percentage drawn-
The curve of time is more accurate.The method, compared with method noted earlier, is significantly improved in measuring method,
But in evaluation methodology, still rest on the aspect of qualitative comparison of mapping.CN102128763A proposes one
The new method that humid keeping performance is evaluated: use DVS dynamic water Sorption Analyzer to measure tobacco shred at constant temperature and humidity
Under the conditions of moisture content over time, until tobacco sample reach balance time, measure tobacco shred butt weight,
Calculate the moisture content of drying base M of tobacco sample tt, and draw moisture content of drying base MtThe change of t in time
Curve；As 0.4 ＜ Mt-Me/M0-MeDuring ＜ 1.0, t tobacco shred moisture content of drying base MtValue is to t0.5
Meeting linear relationship, the slope of gained straight line is exactly rate constants k, can be evaluated the guarantor of tobacco shred by k value
Lubricant nature energy.The method can carry out the qualitative evaluation quantitative with part to the humid keeping performance of Nicotiana tabacum L. or humectant,
But Nicotiana tabacum L. water suction is the veryest long process with the process of dehydration, it is generally required to 4～5 days can be only achieved flat
Weighing apparatus, and the speed in said method must be at satisfied 0.4 ＜ Mt-Me/M0-MeThe time period (one of ＜ 1.0
As between 0-90min) in measure, institute's speed in this way only represents the average the fastest of 0-90min
Rate, is difficult to intactly reflect whole moisture absorption or solve the dynamic change of wet process, it is impossible to enough comprehensively evaluate cigarette
Grass and the physics humid keeping performance of tobacco product.CN102636407A discloses a kind of Nicotiana tabacum L. physics humid keeping performance
Method of testing, the method is included in tobacco sample interpolation humectant for smoke and moisture, sample tobacco shred bottle are weighed
Calculate the instant moisture content of different time and make percentage of water loss curve comparison step.The method utilizes measures tobacco shred
Weight differential, calculates the instant moisture content of tobacco shred, and calculates the most aqueous according to the initial aqueous rate of tobacco shred
Rate and the difference of initial aqueous rate, calculate percentage of water loss, paint according to the data point of Medicated cigarette percentage of water loss with time relationship
Yeast production line, according to comparing the numerical value difference of the profile of equilibrium, in this, as comparing humectant for smoke physics humectation
The foundation of energy.CN103105341A discloses a kind of method evaluating humid keeping performance of tobacco, the method by with
Lower step is carried out: measure the initial aqueous rate of tobacco sample；Tobacco moisture percentage measurement apparatus is utilized to measure Nicotiana tabacum L.
Tobacco shred weight is over time in constant environment for sample；According to initial aqueous rate and tobacco quality-time
Data calculate tobacco sample moisture content-time data；By tobacco sample moisture content, the moment is made non-thread
Property fitted figure, the curve of institute's matching meets certain formula；Solve in can obtaining random time section according to formula
Wet (moisture absorption) Mean Speed.In the case of tobacco sample initial aqueous rate is close, wet (moisture absorption) will be solved
Value as evaluate tobacco sample humid keeping performance foundation.
But said method still suffers from some shortcomings: the fluctuation of (1) ambient temperature and humidity is relatively big, such as some grinds
Study carefully and directly control humidity with climatic chamber and make the moisture fluctuation of environment bigger, it is impossible to actual response sample exists
Humid keeping performance under certain damp condition；(2) set point of ambient temperature and humidity is limited, such as some method
Can not set up the environment that absolute humidity is 0, some method can not set up the humidity environment more than 75%；(3)
Testing efficiency is the highest, and such as some is studied to make humiture keep constant cavity design to obtain smaller, thus
Multiple sample can not be measured simultaneously；(4) automatization and integrated horizontal are the highest, are easily affected by human factors and cause
Experimental error, such as some method need to depart from constant-temperature constant-humidity environment and weigh the change of sample moisture.Humid keeping performance
The imperfection of method of testing directly affects the research improving Medicated cigarette physics humid keeping performance, had both been unfavorable for humectation
The evaluation of energy, is also unfavorable for the humectant technology such as novel humectant and the exploitation of method.
Summary of the invention
First technical problem that the invention solves the problems that is to provide the evaluation side of a kind of humidity preservation property of cigarette
Method, the method can set up the volume that a kind of automaticity is high, Temperature and Humidity Control level is high and testing efficiency is high
The test of cigarette cigarette humid keeping performance and evaluation methodology.
For solving above-mentioned technical problem, the present invention uses following technical proposals:
A kind of evaluation method of humidity preservation property of cigarette, including following preparation process:
1) prepare Medicated cigarette sample, Cigarette is placed in the condition of " temperature 22 DEG C, relative humidity 60% "
Lower balance 48 hours, then starts the cigarette intercepting 1～4cm as Medicated cigarette sample from cigarette end；
2) the ambient temperature and humidity condition of dynamic water absorption sets as follows: first regulation SPSx dynamic water is inhaled
The temperature of attached instrument is 22 DEG C, and relative humidity is 60%, after reaching balance, and set environment temperature, relatively
Humidity reduces to 0 with the step-length of 1%～20% from the highest；
3) in adsorption instrument, put into the weighing plate of dress Medicated cigarette sample, separately put into an identical weighing plate conduct
Blank reference dish, then weighs the tare weight of plate；
4) Medicated cigarette sample is placed in weighing plate, weighs the mass M that Medicated cigarette sample is initial0；
5) at interval of 1～10min automatic weighing sample mass Mi, treat mass MiInvariable reach balance after
(now quality is designated as M), envionmental humidity is reduced to another by high humility automatically by the step-length of 1%～20%
Under one damp condition, continue weigh sample, until sample mass stablize constant after, continue become according to the method described above
Removing dampness degree weighs, until humidity is 0 sample reach balance time, terminate measure；
6) after Medicated cigarette sample balances 48 hours under conditions of " temperature 22 DEG C, relative humidity 60% ",
Put into the oven drying 2 hours of 100 DEG C, measure initial aqueous rate Y of sample0=(G0-G)/G0, G0: dry
Dry front sample mass；G: sample mass after being dried 2 hours；
7) according to initial aqueous rate Y of Medicated cigarette sample0, calculate the balance of sample under each relative humidity conditions
Moisture content Y=(M0*Y0-M0+M)/M；
8) with envionmental humidity as independent variable, the equilibrium moisture content of Cigarette is dependent variable, and foundation refers to
Number matched curveY in formula: equilibrium moisture content, T: relative humidity, b0: fit equation
Constant term, with coefficient b1Represent the humid keeping performance of Cigarette.
Preferably, the cigarette weight franchise ± 20mg described in step (1), resistance to suction franchise ± 50Pa, described
The cigarette of intercepting comprise cigarette paper.
Preferably, step (2) described ambient temperature is 5～60 DEG C.
Preferably, step (4) described Medicated cigarette sample quantities is 1～4.
Preferably, under the described each damp condition of step (5), the sample balance time used is 2～120 hours.
SPSx moisture analyser includes adjustable climatic chamber, porous sample frame, weighing plate and sample
Room；Porous sample is erected in constant temperature and humidity box body；Weighing plate is placed on porous sample frame；Sample room
It is provided with temperature controller and humidity controller；Constant temperature and humidity box body cavity of resorption is provided with built-in high accuracy analysis sky
Flat, temperature sensor and automatic sampler；High accuracy analysis balance, temperature sensor and auto injection
Device is connected with computer, and realization is real-time to be monitored.
Beneficial effects of the present invention:
The present invention can realize the quantitative of cigarette humid keeping performance, reflects the change procedure of moisture in Cigarette.
The method can be used for the mensuration of humidity preservation property of cigarette, simple to operate, the most convenient.
Detailed description of the invention
For being more fully understood that the present invention, the side of the present invention will be further illustrated by specific embodiment below
Case, protection scope of the present invention should include the full content of claim, but be not limited to this.
Embodiment 1
1) prepare Medicated cigarette sample, 2 Cigarettes are placed in temperature 22 DEG C, the condition of relative humidity 60%
Lower balance 48 hours, then starts to intercept 4cm as Medicated cigarette sample from cigarette end；
2) regulate " temperature is 22 DEG C, and relative humidity is 60% " of SPSx dynamic water adsorption instrument, reach
After balance, ambient temperature keeps 22 DEG C, and relative humidity reduces to 0 with the step-length of 10% from 90%；
3) put into the weighing plate of dress Medicated cigarette sample, separately put into an identical weighing plate as blank reference dish,
Then the tare weight of plate is weighed；
4) Medicated cigarette sample is placed in weighing plate, weighs the mass M that Medicated cigarette sample is initial0；
5) at interval of 1～10min automatic weighing sample mass Mi, treat mass MiInvariable reach balance after
Quality is designated as M, and envionmental humidity is reduced under another damp condition by the step-length of 10% automatically, continues to weigh
Sample, until sample mass stablize constant after, continue according to the method described above change relative humidity weigh, directly
To relative humidity be 0 sample reach balance time, terminate measure；
6) after Medicated cigarette sample balances 48 hours under conditions of " temperature 22 DEG C, relative humidity 60% ",
Put into the oven drying 2 hours of 100 DEG C, measure initial aqueous rate Y of sample0=(G0-G)/G0, G0: dry
Dry front sample mass；G: sample mass after being dried 2 hours；
7) according to initial aqueous rate Y of Medicated cigarette sample0, calculate the balance of sample under each relative humidity conditions
Moisture content Y=(M0*Y0-M0+M)/M；
8) with envionmental humidity as independent variable, the equilibrium moisture content of Cigarette is dependent variable, and foundation refers to
Number matched curve
It is as follows that matching obtains exponential equation:
Y=0.712e0.046T
In formula: Y equilibrium moisture content (%)；
T envionmental humidity.
The correction coefficient R of the exponential fitting equation obtained2Being 0.987, this brand cigarette cigarette is 22
Humid keeping performance index at DEG C is 0.046.
Embodiment 2
Take 4 certain brand cigarettes, be placed on the SPSx dynamic water adsorption instrument aluminum matter weighing having surveyed tare weight
In dish, first " temperature: 22 DEG C, relative humidity: 60% " balance, reach balance after, after 10
At DEG C, humidity changes to 0 with the step-length of 9% from 90%, measured an inferior quality at interval of 5 minutes, treats its matter
Quantitative change rate enters next humidity environment measure less than 0.01% for 2 hours.After mensuration terminates, with environment phase
Being independent variable to humidity, the moisture content of cigarette raw material is dependent variable, and it is as follows that matching obtains exponential equation:
Y=0.866e0.041T
In formula: Y represents equilibrium moisture content (%)；
T represents envionmental humidity.
The correction coefficient R of the exponential fitting equation obtained2Being 0.976, this brand cigarette cigarette is 10
Humid keeping performance index at DEG C is 0.041.
Embodiment 3
Repeating embodiment 1, it the difference is that only, described Medicated cigarette sample is 1, step 2) described
Ambient temperature is 5 DEG C, and initial RH is 80%；Relative humidity reduces to 0 with the step-length of 20% from 80%.
Envionmental humidity described in step 5) is reduced under another damp condition automatically by the step-length of 20%.
Embodiment 4
Repeating embodiment 1, it the difference is that only, described Medicated cigarette sample is 3, step 2) described
Ambient temperature is 60 DEG C, and initial RH is 70%；Relative humidity reduces to 0 with the step-length of 5% from 70%.
Envionmental humidity described in step 5) is reduced under another damp condition automatically by the step-length of 5%.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and also
Non-is the restriction to embodiments of the present invention, for those of ordinary skill in the field, above-mentioned
Can also make other changes in different forms on the basis of explanation, here cannot be to all of enforcement
Mode gives exhaustive, every belongs to the obvious change or variation that technical scheme extended out
Row still in protection scope of the present invention.
Claims (1)
1. an evaluation method of humidity preservation property of cigarette, it is characterised in that specifically comprise the following steps that
1) prepare Medicated cigarette sample, Cigarette is placed in the condition of " temperature 22 DEG C, relative humidity 60% "
Lower balance 48 hours, then starts the cigarette intercepting 1～4cm as Medicated cigarette sample from cigarette end；
2) the ambient temperature and humidity condition of dynamic water absorption sets as follows: first regulation SPSx dynamic water is inhaled
The temperature of attached instrument is 22 DEG C, and relative humidity is 60%, after reaching balance, and set environment temperature, relatively
Humidity reduces to 0 with the step-length of 1%～20% from the highest；
3) in adsorption instrument, put into the weighing plate of dress Medicated cigarette sample, separately put into an identical weighing plate conduct
Blank reference dish, then weighs the tare weight of plate；
4) Medicated cigarette sample is placed in weighing plate, weighs the mass M that Medicated cigarette sample is initial0；
5) at interval of 1～10min automatic weighing sample mass Mi, treat mass MiInvariable reach balance after
Quality is designated as M, and envionmental humidity is reduced to another humidity bar by high humility automatically by the step-length of 1%～20%
Under part, continue weigh sample, until sample mass stablize constant after, continue according to the method described above change humidity enter
Row weigh, until humidity is 0 sample reach balance time, terminate measure；
6) after Medicated cigarette sample balances 48 hours under conditions of " temperature 22 DEG C, relative humidity 60% ",
Put into the oven drying 2 hours of 100 DEG C, measure initial aqueous rate Y of sample0=(G0-G)/G0, G0: dry
Dry front sample mass；G: sample mass after being dried 2 hours；
7) according to initial aqueous rate Y of Medicated cigarette sample0, calculate the balance of sample under each relative humidity conditions
Moisture content Y=(M0*Y0-M0+M)/M；
8) with envionmental humidity as independent variable, the equilibrium moisture content of Cigarette is dependent variable, and foundation refers to
Number matched curveY in formula: equilibrium moisture content, T: relative humidity, b0: fit equation
Constant term, with coefficient b1Represent the humid keeping performance of Cigarette；
Cigarette weight franchise ± 20mg described in step (1), resistance to suction franchise ± 50Pa, described intercepting
Cigarette comprises cigarette paper；
Step (2) described ambient temperature is 5～60 DEG C；
Step (4) described Medicated cigarette sample quantities is 1～4；
Under the described each relative humidities of step (5), the sample balance time used is 2～120 hours.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105699239A (en) * | 2016-02-23 | 2016-06-22 | 江苏中烟工业有限责任公司 | Method for analyzing moisture retention ability of tobaccos and tobacco products by aid of near-infrared spectral models |
| CN107543770B (en) * | 2016-06-24 | 2020-04-03 | 梅特勒-托利多仪器（上海）有限公司 | Moisture meter and method of using same |
| CN107843526A (en) * | 2017-03-17 | 2018-03-27 | 湖北航天化学技术研究所 | The method of testing of moisture diffusion coefficient in composite solidpropellant |
| CN107490658B (en) * | 2017-09-11 | 2019-07-16 | 云南中烟工业有限责任公司 | A kind of evaluation method of cigarette humid keeping performance |
| CN107589038A (en) * | 2017-10-25 | 2018-01-16 | 江苏中烟工业有限责任公司 | A kind of method of the two-way humid keeping performance of Fast Evaluation humectant |
| CN110514096B (en) * | 2019-07-26 | 2020-11-20 | 云南中烟工业有限责任公司 | Cigarette moisture retention performance evaluation method based on film-forming performance of moisture retention agent |
| CN112525760A (en) * | 2020-11-24 | 2021-03-19 | 厦门市健康医疗大数据中心(厦门市医药研究所) | Method for digitally and quantitatively evaluating moisture absorption strength of substance |
| CN114813433B (en) * | 2022-05-02 | 2024-08-13 | 中国烟草总公司郑州烟草研究院 | Rapid moisture detection method based on quadratic curve moisture drying model |
| CN115078160B (en) * | 2022-06-15 | 2024-09-17 | 上海烟草集团有限责任公司 | Moisture barrier property characterization method of multi-layer cigarette packaging box |
| CN115281381A (en) * | 2022-08-16 | 2022-11-04 | 湖北中烟工业有限责任公司 | Electric heating cigarette preheating method |
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