CN105043924A - Tobacco rapid industrial analysis method - Google Patents
Tobacco rapid industrial analysis method Download PDFInfo
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- CN105043924A CN105043924A CN201510312256.0A CN201510312256A CN105043924A CN 105043924 A CN105043924 A CN 105043924A CN 201510312256 A CN201510312256 A CN 201510312256A CN 105043924 A CN105043924 A CN 105043924A
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Abstract
The invention discloses a tobacco rapid industrial analysis method. According to the invention, a thermogravimetric analysis method replaces a drying oven method and a Muffle furnace method which are used for traditional proximate analysis, and a moisture value, an ash content value, a volatile matter value and a fixed carbon value of a tobacco sample are obtained through a TG curve at the same time. The method has the advantages of small sample amount for detection, short analysis time, low cost, simple operation and accurate experimental result, and is a tobacco rapid industrial analysis method capable of meeting rapid on-line analysis requirement of industrial current environment.
Description
One, technical field
The present invention relates to a kind of analytical approach, specifically one to grow tobacco rapid technical analysis method, belong to Tobacco Analysis field.
Two, background technology
Technical analysis is derived from coal industry, and then is extended in the analysis indexes of other biological material, generally includes the analytical test of these four numerical value of moisture, ash content, volatile matter and fixed carbon.Wherein, moisture, ash content, volatile matter are all obtain data result of calculation by test, and fixed carbon is then utilize the test findings of above-mentioned three to obtain by calculating.Namely conventional technical analysis test at least should have above three processs of the test, has just calculated the technical analysis of this sample after the numerical value obtaining moisture in sample, ash content, volatile matter and calculate fixed carbon.
Tobacco is as a kind of special living beings, and its technical analysis index is equally very important.Tobacco ash content is remaining material after result of combustion of tobacco, main based on inorganic oxide and salt, the height of its content has direct relation with tobacco leaf flammability, with aroma quality, perfume quantity, assorted gas, total score of smokeing panel test, pungency and pleasant impression in significantly or extremely significant negative correlation, it is one of major criterion weighing tobacco quality, dissimilar tobacco ash content differs greatly, and therefore, measures tobacco ash content and to seem particular importance.
The method measuring tobacco ash content in tobacco business standard " mensuration of YC/T427-2012 tobacco and tobacco product ash content " adopts muffle furnace method, complex operation, length consuming time, needs one hour even for more time; And without automatic-discharging system, potential safety hazard is existed to operator.
In tobacco, the content of volatile matter has great importance for the flammability of tobacco.Burning and sucking in process, the combustion process of tobacco can be divided into following four-stage usually:
(1) preheating and drying stage
(2) Volatile and charcoal formation stages
(3) the volatile combustion stage
(4) fixed carbon combustion phases
The volatile matter of tobacco is determined by the factor such as natural conditions, degree of ripeness, represents the quantity that tobacco institute produces inflammable gas, is the important indicator reflecting result of combustion of tobacco performance, then affects the sucking quality of tobacco.Under the same terms, volatile content is higher, and result of combustion of tobacco is better.The volatile content of Different sources, different types of tobacco product may there are differences, but the tobacco product volatile matter of the same place of production, same kind should be relatively.Measure the volatile matter of tobacco and tobacco product, combustion characteristics and the interior quality of tobacco can be reflected to a certain extent.
Mensuration at present for volatile matter in tobacco is temporary without relevant criterion, but the test condition due to moisture, ash content and volatile matter has larger difference, all the time, the test of these three indexs all independently, individual event carries out successively, like this, test overall process time length, inefficiency, can not adapt to the requirement of industry spot fast on-line analyzing.
Three, summary of the invention
The present invention aims to provide one and to grow tobacco rapid technical analysis method, and the method is simple, cost is low, efficiency is high, analyzes data accurate.
The present invention directly utilizes thermogravimetry (TGA), is obtained the moisture value in tobacco, ash value, fugitive constituent value and fixing carbon value by TG curve simultaneously.
Tobacco rapid technical analysis method of the present invention comprises the following steps:
(1) tobacco sample pulverizing, excessively 40 mesh sieves are obtained offal, take the sample crucible that 10-20mg offal is placed in thermogravimetric analyzer, under atmosphere of inert gases, (flow velocity 100mL/min) keeps 8min with 20 DEG C/min temperature programme to 105 DEG C, and now in TG curve, the percent weight loss of sample is moisture value in tobacco sample;
(2) to continue under atmosphere of inert gases (flow velocity 100mL/min) and keep 5min with 20 DEG C/min from 105 DEG C of temperature programmes to 950 DEG C, now in TG curve, the percent weight loss of sample deducts moisture value and is volatile content in tobacco sample;
(3) maintenance 950 DEG C is temperature-resistant, and adjustment atmosphere is air (flow velocity 100mL/min), and keeps 20min, and final residue sample quality number percent is ash content in tobacco sample;
(4) fixed carbon content in sample can be calculated by moisture, volatile matter and ash content.
Compared with prior art, advantage of the present invention is just: tobacco rapid technical analysis method of the present invention, the measurement of moisture, ash content and the volatile matter in the technical analysis process of tobacco is obtained in same TG curve simultaneously, breach the restriction that test condition difference is brought, and ensure that the consistance of test findings and classic method.The inventive method highly shortened tobacco industry analytical test T.T., substantially increases measurement efficiency; In addition, detecting required sample size is milligram level, and while sample size reduces greatly, sample is heated more even, can improve measurement accuracy, meet the requirement of industry spot fast on-line analyzing, and provide new technical thought for the technical analysis of other biological material.
Four, accompanying drawing explanation
Fig. 1 is certain tobacco sample TG curve map of the present invention.
Fig. 2 is the linear relationship fitted figure (a:VM of TG method and traditional muffle furnace method testing result; B:AC).
Five, embodiment
Below with reference to the drawings and specific embodiments, the present invention is described in further details.
Embodiment 1:
As shown in Figure 1, the present invention one grows tobacco rapid technical analysis method, directly utilize thermogravimetry (TGA), a complete TG curve made by instrument, obtained the moisture value in tobacco, ash value, fugitive constituent value and fixing carbon value by TG curve simultaneously.
Concrete operations comprise the following steps:
(1) tobacco sample obtains offal after pulverizing and sieving, take the sample crucible that 10mg offal is placed in thermogravimetric analyzer, under atmosphere of inert gases, (flow velocity 100mL/min) is with 20 DEG C/min temperature programme to 105 DEG C, and keep 8min, now in TG curve, the percent weight loss of sample is moisture value in tobacco sample.
(2) to continue under atmosphere of inert gases (flow velocity 100mL/min) and keep 5min with 20 DEG C/min from 105 DEG C of temperature programmes to 950 DEG C, now the percent weight loss of sample in TG curve, deducts moisture value and is volatile content in tobacco sample.
(3) maintenance 950 DEG C is temperature-resistant, and regulate atmosphere to air (flow velocity 100mL/min) and keep 20min, final residue sample quality number percent is ash content in sample.
(4) fixed carbon content in sample can be calculated by moisture, volatile matter and ash content.
After above-mentioned off-test, the moisture value of tobacco sample is step (1) procedure quality percent loss in TG curve, is denoted as w, and unit is percentage (%).
The volatilization score value of butt sample calculates by following formula (1):
In formula: VM
dbthe volatilization score value of-butt sample, unit is percentage (%);
M
1step (2) procedure quality percent loss in-TG curve, unit is percentage (%);
W-sample water score value, unit is percentage (%).
The ash value of butt sample calculates by following formula (2):
In formula: A
dbthe ash value of-butt sample, unit is percentage (%);
M
2final residue mass loss number percent in-TG curve, unit is percentage (%);
W-sample water score value, unit is percentage (%).
The fixing carbon value of butt sample calculates by following formula (3):
FC
db＝(1-VM
db-A
db)×100％…………(3)
In formula: FC
dbthe fixing carbon value of-butt sample, unit is percentage (%).
Table 1 is the comparison adopting test method of the present invention and conventional test methods test findings.
Table 1
Data as can be seen from table 1: the test result of the inventive method, no matter from mean value or standard deviation, is all coincide with classic method result.Can confirm from Fig. 2, the testing result of the inventive method and classic method achieves good consistance, and linear fit is better.But also there are some differences simultaneously, the inventive method for the VM testing result of whole sample a little more than classic method, and AC detected value is a little less than classic method, this is that sample size is milligram level needed for the inventive method, while sample size reduces greatly, sample is heated more even, burning, the pyrolysis of VM and FC are more abundant, improve the accuracy of testing result.Meanwhile, total time on test substantially reduces than classic method, has fully demonstrated the present invention's feature fast and accurately.
This detects data only for above-mentioned detection sample.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. one growing tobacco rapid technical analysis method, it is characterized in that: by thermogravimetry through once testing moisture value, ash value, fugitive constituent value and the fixing carbon value that can obtain in tobacco, comprising the following steps:
(1) tobacco sample pulverizing, excessively 40 mesh sieves are obtained offal, take the sample crucible that 10-20mg offal is placed in thermogravimetric analyzer, under atmosphere of inert gases, be warming up to 105 DEG C and keep 8min, now in TG curve, the percent weight loss of sample is moisture value in tobacco sample;
(2) continuing under atmosphere of inert gases from 105 DEG C of temperature programmes to 950 DEG C and keep 5min, now in TG curve, the percent weight loss of sample deducts moisture value and is volatile content in tobacco sample;
(3) maintenance 950 DEG C is temperature-resistant, and adjustment atmosphere is air, and keeps 20min, and final residue sample quality number percent is ash content in tobacco sample;
(4) fixed carbon content in sample is calculated by moisture, volatile matter and ash content.
2. method according to claim 1, is characterized in that:
In test process, the flow velocity of inert gas is set to 100mL/min.
3. method according to claim 1, is characterized in that:
Heating rate in step (1) and step (2) is 20 DEG C/min.
4. method according to claim 1, is characterized in that:
In step (3), the flow velocity of air is set to 100mL/min.
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| CN201510312256.0A CN105043924A (en) | 2015-06-09 | 2015-06-09 | Tobacco rapid industrial analysis method |
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| CN201510312256.0A CN105043924A (en) | 2015-06-09 | 2015-06-09 | Tobacco rapid industrial analysis method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841366A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | A kind of method for recognizing cigarette ash and other ashes |
| CN107860868A (en) * | 2017-11-03 | 2018-03-30 | 福建中烟工业有限责任公司 | Tobacco matching process and system |
| CN108444859A (en) * | 2018-02-06 | 2018-08-24 | 山东科技大学 | Alkyl ammonium adsorp tion capacity and the assay method of adsorption rate in a kind of montmorillonite/alkylammonium compound |
| CN109187886A (en) * | 2018-10-16 | 2019-01-11 | 湖北中烟工业有限责任公司 | A kind of detection method of raw material of cigarette mixture homogeneity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841366A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | A kind of method for recognizing cigarette ash and other ashes |
| CN107860868A (en) * | 2017-11-03 | 2018-03-30 | 福建中烟工业有限责任公司 | Tobacco matching process and system |
| CN108444859A (en) * | 2018-02-06 | 2018-08-24 | 山东科技大学 | Alkyl ammonium adsorp tion capacity and the assay method of adsorption rate in a kind of montmorillonite/alkylammonium compound |
| CN109187886A (en) * | 2018-10-16 | 2019-01-11 | 湖北中烟工业有限责任公司 | A kind of detection method of raw material of cigarette mixture homogeneity |
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Application publication date: 20151111 |