CN105974063A - Building method and prediction method of cigarette total smoke pH value prediction model - Google Patents
Building method and prediction method of cigarette total smoke pH value prediction model Download PDFInfo
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- CN105974063A CN105974063A CN201610407933.1A CN201610407933A CN105974063A CN 105974063 A CN105974063 A CN 105974063A CN 201610407933 A CN201610407933 A CN 201610407933A CN 105974063 A CN105974063 A CN 105974063A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
Abstract
The invention relates to a method for predicting a cigarette total smoke pH value and belongs to the technical field of tobacco. According to the method, the cigarette total smoke pH value and cigarette particulate matter pH value are subjected to stepwise regression analysis to obtain a regression formula of the particulate matter pH value and the total smoke pH value, namely, Y=0.1603+0.9685X, wherein the average relative error of prediction of the total smoke pH value is smaller than 1%, and prediction results are accurate. Operation steps for total smoke pH value prediction are greatly simplified, people only need to measure the particulate matter pH value of cigarettes to well predict the cigarette total smoke pH value, and testing of smoke gaseous-phase matter and detection conducted after particulate matter extract and gaseous-phase matter absorbing liquid are mixed are avoided; compared with a smoke water extraction pH method, efficiency is improved by at least 50%, and cost is reduced by at least 60%. The method and a method T-113 recommended by the ministry of health of Canada are compared, results show that results obtained through the two methods are highly consistent, and comparability is achieved.
Description
Technical field
The invention belongs to technical field of tobacco, be specifically related to a kind of Medicated cigarette full smoke pH forecast model construction method and
Its Forecasting Methodology.
Background technology
Smoke pH is one of aggregative indicator of Medicated cigarette total quality reflection, and it can reflect the acid of smoke chemistry composition
Soda balance relation and the existing forms of smoking nicotine, be also important parameter, therefore a flue gas pH of smoking property of cigarette quality simultaneously
The hot issue of the analyzing detecting method of value always research.
The assay method of cigarette mainstream flue gas pH has a lot, but without unified bioassay standard.Measure Medicated cigarette cigarette at present
The method of gas pH is summed up mainly two kinds: " flue gas water extract pH method " and " flue gas pH/ electrode method "." flue gas water extracts
Liquid pH method " the main assay method that uses is that the pH value measured after mixing granule phase substance extract and gas gas-phase objects absorbing liquid is as full cigarette
Gas pH value, method complex operation, waste time and energy." flue gas pH/ electrode method " is mainly employing and is coated with water-soluble glue or buffers molten
The extraordinary electrode of liquid inserts in main flume path, and to measure pH value, method needs to transform existing smoking machine, universality
Poor, it is difficult to popularization and application.The most how overcoming the deficiencies in the prior art is the problem that current technical field of tobacco needs solution badly.
Summary of the invention
The invention aims to solve the deficiencies in the prior art, it is provided that a kind of Medicated cigarette full smoke pH forecast model
Construction method and Forecasting Methodology thereof, this Forecasting Methodology needs only to measure Medicated cigarette granule phase substance pH value, can preferably predict Medicated cigarette
Full smoke pH, method simple possible, it is easy to popularization and application.
For achieving the above object, the technical solution used in the present invention is as follows:
The construction method of a kind of Medicated cigarette full smoke pH forecast model, comprises the steps:
Step (1), chooses the cigarette sample of multiple trade mark；The tar content coverage of described cigarette sample be 3～
13mg/ props up, and nicotine content in smoke coverage is 0.3～1.2mg/ to prop up；Described trade mark quantity is more than 10；
Step (2), the 8-12 that the cigarette sample of each trade mark is chosen props up, and according to standard conditions, on smoking machine, suction is same
All cigarette samples of one trade mark, and the granule phase substance of this trade mark Medicated cigarette is collected with cambridge filter, then cambridge filter is placed in 23-
In 26mL extract after oscillation extraction 29-31min, measure the pH value of extract, i.e. obtain granule phase substance pH value；Then with equipped with
The absorption bottle of 23-26mL absorbing liquid absorbs flue gas, after having aspirated, measures the pH value of absorbing liquid in absorption bottle, i.e. obtains gas phase
Thing pH value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio；
Described absorbing liquid is also that 1:1 mix with isopropanol according to volume ratio for distilled water；
Step (3), takes isopyknic step (2) and has extracted the extract of cambridge filter and absorbed the absorbing liquid of flue gas,
Survey pH value after mix homogeneously, i.e. obtain full smoke pH；
Step (4), carries out regression analysis as independent variable X, full smoke pH as response variable Y using granule phase substance pH,
To regression equation: Y=0.1603+0.9685X, this regression equation is Medicated cigarette full smoke pH forecast model.
It is further preferred that described cigarette sample includes blended type cigarette sample and Virginian-type cigarette sample.
It is further preferred that the construction method of described Medicated cigarette full smoke pH forecast model, comprise the steps:
Step (1), chooses the cigarette sample of multiple trade mark；The tar content coverage of described cigarette sample be 3～
13mg/ props up, and nicotine content in smoke coverage is 0.3～1.2mg/ to prop up；Described trade mark quantity is more than 10；
Step (2), choose 10 of the cigarette sample of each trade mark, according to standard conditions, aspirate same on smoking machine
All cigarette samples of the trade mark, and the granule phase substance of this trade mark Medicated cigarette is collected with cambridge filter, then cambridge filter is placed in 25mL
In extract after oscillation extraction 30min, measure the pH value of extract, i.e. obtain granule phase substance pH value；Then absorb with equipped with 25mL
The absorption bottle of liquid absorbs flue gas, after having aspirated, measures the pH value of absorbing liquid in absorption bottle, i.e. obtains gas gas-phase objects pH value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio；
Described absorbing liquid is also that 1:1 mix with isopropanol according to volume ratio for distilled water；
Step (3), takes isopyknic step (2) and has extracted the extract of cambridge filter and absorbed the absorbing liquid of flue gas,
Survey pH value after mix homogeneously, i.e. obtain full smoke pH；
Step (4), carries out regression analysis as independent variable X, full smoke pH as response variable Y using granule phase substance pH,
To regression equation: Y=0.1603+0.9685X, this regression equation is Medicated cigarette full smoke pH forecast model.
The present invention also provides for the Forecasting Methodology of the full smoke pH of a kind of Medicated cigarette, uses the full smoke pH of above-mentioned Medicated cigarette to predict mould
The Medicated cigarette full smoke pH forecast model that the construction method of type builds, it is characterised in that comprise the steps:
Step (1), detects the granule phase substance pH value of cigarette sample to be measured；
Step (1), substitutes into the Medicated cigarette full smoke pH prediction mould built using the granule phase substance pH value recorded as independent variable X
Type: Y=0.1603+0.9685X, can draw the value of response variable Y, and this Y value is this full smoke pH of cigarette sample to be measured.
It is further preferred that the concrete grammar of step (1) is: the 8-12 chosen props up cigarette sample to be measured, according to standard
Condition, aspirates all cigarette samples to be measured on smoking machine, and collects the granule phase substance of this cigarette sample to be measured with cambridge filter, so
After cambridge filter is placed in 23-26mL extract after oscillation extraction 29-31min, measure extract pH value, i.e. obtain a phase
Thing pH value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio.
Compared with prior art, it has the beneficial effect that the present invention
Forecasting Methodology of the present invention needs only to measure Medicated cigarette granule phase substance pH value, can preferably predict the full flue gas pH of Medicated cigarette
Value, examines after the test to flue gas gas gas-phase objects and granule phase substance extract and gas gas-phase objects absorbing liquid so can be avoided to mix
Surveying, enormously simplify detecting step, compared with flue gas water extract pH method, efficiency at least improves 50%, meanwhile, cost savings
At least 60%.
Full flue gas pH predicted by the model built by the present invention, and method is more convenient；This method and Her Majesty the Queen in right of Canada as represented by the minister of Healt
Recommendation method T-113 (" flue gas pH/ electrode method ") has carried out Comparability test, and result shows that 2 kinds of method acquired results are highly consistent,
There is comparability.
Accompanying drawing explanation
Fig. 1 present invention has neither part nor lot in 34 trade mark cigarette sample full flue gas pH predictive values and the actual value dependency relation of modeling
Figure；
Fig. 2 present invention has neither part nor lot in 34 trade mark cigarette sample full flue gas pH predictive values and the actual value residual plot of modeling.
Note: Fig. 1 and Fig. 2 is all 34 data, wherein has 4 overlapping data, so only 30 points.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and should not be regarded as limiting this
Bright scope.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition
Or carry out according to product description.Agents useful for same or instrument unreceipted production firm person, be and can be obtained by purchase
Conventional products.
The present invention mainly to granule phase substance pH value, gas gas-phase objects pH value and full smoke pH as index to be studied.This
The finished cigarettes sample of bright 45 trades mark of employing is as modeling sample, including 14 trade mark mixed type samples and 31 trades mark
Fire-cured tobacco type sample, tar content coverage is 3～13mg/ to prop up, and nicotine content in smoke coverage is 0.3～1.2mg/ to prop up.
Choose 10 of the cigarette sample of each trade mark, according to standard conditions, aspirate the institute of the same trade mark on smoking machine
There is cigarette sample, and collect granule phase substance with cambridge filter, by 25mL extract (distilled water and isopropyl in 50mL tool plug conical flask
Alcohol volume ratio is 1:1), after oscillation extraction 30min, measure the pH value i.e. granule phase substance pH value of extraction solution；And be hinged with and inhale with 25mL
The absorption bottle receiving liquid (distilled water and isopropanol volume ratio are 1:1) absorbs flue gas, measures its pH value i.e. gas gas-phase objects after having aspirated
PH value；Taking 12.5ml absorbing liquid and extract respectively, mixing shakes up, and surveys pH value and is full smoke pH.
From table 1-3,45 brands R=0.9963, illustrate have significantly between granule phase substance pH and total flue gas pH
Positive correlation.Utilizing granule phase substance pH as independent variable, total flue gas pH carries out regression analysis as response variable and obtains regression equation:
Y=0.1603+0.9685X (R2=0.9925).The results of analysis of variance shows, regression equation all reach pole significant level (P <
0.001), and regression equation intercept and coefficient all reach P < 0.05, i.e. can be using this regression equation as more satisfactory prediction
Model uses.
Table 1 granule phase substance pH value and regression equation R and R of total smoke pH2Information table
| Coefficient of multiple correlation R | R2 | Adjust R2 | Standard error |
| 0.9963 | 0.9925 | 0.9924 | 0.0165 |
Table 2 granule phase substance pH value and the regression equation significance test table of total smoke pH
| Degree of freedom | Quadratic sum | Mean square | F value | P value | |
| Regression analysis | 1 | 1.5494 | 1.5494 | 5724.205 | 2.2032E-47 |
| Residual error | 43 | 0.0116 | 0.0003 | ||
| Amount to | 44 | 1.5611 |
Table 3 granule phase substance pH value and the regression equation coefficient information table of total smoke pH
| Coefficient | Standard error | T value | P value | |
| Intercept | 0.1603 | 0.0798 | 2.0095 | 0.05 |
| Granule phase substance pH | 0.9685 | 0.0128 | 75.6585 | 2.2E-47 |
Finding through the studies above, granule phase substance extract is the buffer system that buffering efficiency is higher, with gas gas-phase objects absorbing liquid
Mix total flue gas pH impact less, between granule phase substance pH and total flue gas pH, there is stronger dependency, and this method and adding
Ministry of Public Health of putting on airs recommends method T-113 (" flue gas pH/ electrode method ") to carry out Comparability test, and result shows 2 kinds of method gained knots
The most highly consistent, there is comparability (being shown in Table 4).
42 kinds of method comparison results of table
By further illustrating the desired effects that the present invention is reached, use 34 trade mark Medicated cigarette samples having neither part nor lot in modeling
Product, its tar content scope is 4.8～12.9mg/ to prop up, detection each sample granule phase substance pH value, gas gas-phase objects pH value and mixed full cigarette
Gas pH measured value, and predict its full smoke pH with built regression equation.
Choose 10 of the cigarette sample of each trade mark, according to standard conditions, aspirate the institute of the same trade mark on smoking machine
There is a cigarette sample, and collect the granule phase substance of this trade mark Medicated cigarette with cambridge filter, in 50mL tool plug conical flask, use 25mL extract
(distilled water and isopropanol volume ratio are 1:1), after oscillation extraction 30min, measures the pH value i.e. granule phase substance pH value of extraction solution.
The granule phase substance pH value that records is substituted into following regression equation as independent variable X:
Y=0.1603+0.9685X (R2=0.9925)
Can draw the value of response variable Y, this Y value is this cigarette sample to be measured full flue gas pH, wherein R2For determining system
Number.
Calculate the Relative Error of each sample and the prediction average relative error of all samples simultaneously, the results are shown in Table
5, table 6, Fig. 1 and Fig. 2.
Result of the test shows, full flue gas pH predictive value is less with measured value difference, it was predicted that predicting the outcome accurately of model.
The cigarette sample granule phase substance of 5 34 trades mark of table and full smoke pH detection data
The cigarette sample full flue gas pH measured value of 6 34 trades mark of table contrasts with predictive value
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (5)
1. the construction method of a Medicated cigarette full smoke pH forecast model, it is characterised in that comprise the steps:
Step (1), chooses the cigarette sample of multiple trade mark；The tar content coverage of described cigarette sample is that 3 ~ 13mg/ props up,
Nicotine content in smoke coverage is that 0.3 ~ 1.2mg/ props up；Described trade mark quantity is more than 10；
Step (2), the 8-12 that the cigarette sample of each trade mark is chosen props up, and according to standard conditions, aspirates same board on smoking machine
Number all cigarette samples, and collect the granule phase substance of this trade mark Medicated cigarette with cambridge filter, then cambridge filter be placed in 23-26mL
In extract after oscillation extraction 29-31min, measure the pH value of extract, i.e. obtain granule phase substance pH value；Then with equipped with 23-
The absorption bottle of 26mL absorbing liquid absorbs flue gas, after having aspirated, measures the pH value of absorbing liquid in absorption bottle, i.e. obtains gas gas-phase objects pH
Value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio；
Described absorbing liquid is also that 1:1 mix with isopropanol according to volume ratio for distilled water；
Step (3), takes isopyknic step (2) and has extracted the extract of cambridge filter and absorbed the absorbing liquid of flue gas, mixing
Survey pH value after Jun Yun, i.e. obtain full smoke pH；
Step (4), carries out regression analysis as response variable Y using granule phase substance pH as independent variable X, full smoke pH, is returned
Returning equation: Y=0.1603+0.9685X, this regression equation is Medicated cigarette full smoke pH forecast model.
The construction method of Medicated cigarette the most according to claim 1 full smoke pH forecast model, it is characterised in that described volume
Cigarette sample includes blended type cigarette sample and Virginian-type cigarette sample.
The construction method of Medicated cigarette the most according to claim 1 full smoke pH forecast model, it is characterised in that include as follows
Step:
Step (1), chooses the cigarette sample of multiple trade mark；The tar content coverage of described cigarette sample is that 3 ~ 13mg/ props up,
Nicotine content in smoke coverage is that 0.3 ~ 1.2mg/ props up；Described trade mark quantity is more than 10；
Step (2), choose 10 of the cigarette sample of each trade mark, according to standard conditions, aspirate the same trade mark on smoking machine
All cigarette samples, and collect the granule phase substance of this trade mark Medicated cigarette with cambridge filter, then cambridge filter be placed in 25mL extraction
In liquid after oscillation extraction 30min, measure the pH value of extract, i.e. obtain granule phase substance pH value；Then with equipped with 25mL absorbing liquid
Absorption bottle absorbs flue gas, after having aspirated, measures the pH value of absorbing liquid in absorption bottle, i.e. obtains gas gas-phase objects pH value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio；
Described absorbing liquid is also that 1:1 mix with isopropanol according to volume ratio for distilled water；
Step (3), takes isopyknic step (2) and has extracted the extract of cambridge filter and absorbed the absorbing liquid of flue gas, mixing
Survey pH value after Jun Yun, i.e. obtain full smoke pH；
Step (4), carries out regression analysis as response variable Y using granule phase substance pH as independent variable X, full smoke pH, is returned
Returning equation: Y=0.1603+0.9685X, this regression equation is Medicated cigarette full smoke pH forecast model.
4. a Forecasting Methodology for the full smoke pH of Medicated cigarette, uses the prediction of claim 1-3 any one Medicated cigarette full smoke pH
The Medicated cigarette full smoke pH forecast model that the construction method of model builds, it is characterised in that comprise the steps:
Step (1), detects the granule phase substance pH value of cigarette sample to be measured；
Step (1), substitutes into the Medicated cigarette full smoke pH forecast model built: Y=using the granule phase substance pH value recorded as independent variable X
0.1603+0.9685X, can draw the value of response variable Y, and this Y value is this full smoke pH of cigarette sample to be measured.
The Forecasting Methodology of the full smoke pH of Medicated cigarette the most according to claim 4, it is characterised in that the concrete side of step (1)
Method is: the 8-12 chosen props up cigarette sample to be measured, according to standard conditions, aspirates all cigarette samples to be measured on smoking machine, and
Collect the granule phase substance of this cigarette sample to be measured with cambridge filter, then cambridge filter is placed in 23-26mL extract vibration extraction
After taking 29-31min, measure the pH value of extract, i.e. obtain granule phase substance pH value；
Described extract be distilled water be that 1:1 mixes with isopropanol according to volume ratio.
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Cited By (3)
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| CN108398520A (en) * | 2018-03-06 | 2018-08-14 | 江苏中烟工业有限责任公司 | A method of cigarette burning intensity is predicted based on detection Flow Field Distribution |
| CN109799297A (en) * | 2019-02-01 | 2019-05-24 | 广西中烟工业有限责任公司 | A kind of construction method and its regulation method of cigarette smoke pH regulation-control model |
| CN109820241A (en) * | 2019-01-04 | 2019-05-31 | 广西中烟工业有限责任公司 | Method based on nicotine in tobacco leaf formulation and nonvolatile organic acids ratio regulation cigarette smoke pH |
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