CN101526470A - Method for detecting essence for tobacco - Google Patents

Abstract

The invention discloses a method for detecting essence for tobacco. The method comprises that: no less than 7 qualified samples are used for establishing an ultraviolet finger print SIMCA disaggregated model; under a condition that significance level is 5 percent, distance Si of each qualified sample to the qualified sample SIMCA disaggregated model and distance Hi from each qualified sample to the center of the qualified sample SIMCA disaggregated model can be calculated, and Si upper control limit and Hi upper control limit can be calculated; the ultraviolet finger print of the essence for tobacco to be detected is collected, the distance Si from the sample to be detected to the SIMCA disaggregated model and the distance Hi from the sample to be detected to the center of the SIMCA disaggregated model are calculated and determined with the Si upper control limit and the Hi upper control limit. The method overcomes the defects of more detecting instruments, complicated detecting steps and field quick detection unavailability in the prior art, provides the method for detecting the essence for tobacco which reflects the whole character of the essence for tobacco, uses fewer detecting instruments, has simple method, can perform field quick detection, and can be widely applied to tobacco manufacture industry.

Description

The detection method of flavouring essence for tobacco

Technical field

The present invention relates to the detection method of auxiliary element, be specifically related to the detection method of flavouring essence for tobacco.

Background technology

Flavouring essence for tobacco is a kind of multicomponent chemical system of complexity, and is formulated by plurality of raw materials and an amount of solvent mediation, is subjected to multiple factor affecting such as raw material, processing technology, processing environment, only is difficult to its inherent quality is effectively supervised from its physical index.Essence in the cigarette produces special influence to the cigarette smell, is an important indicator of smoker's evaluation cigarette.Common way is to measure physical and chemical indexs such as acid number, relative density, refraction index and molten mixed degree to come quality monitoring according to YC/T 145-1998 industry series standard method at present.This way exists and adopts limited physical and chemical index to characterize quality, uses detecting instrument many, detects problems such as step is loaded down with trivial details, can't realize field quick detection.

Summary of the invention

The present invention has overcome the deficiencies in the prior art, and the detection method of the integral body formation that solves the reflection flavouring essence for tobacco is provided.

For solving above-mentioned technical matters, the present invention by the following technical solutions:

A kind of detection method of flavouring essence for tobacco is characterized in that according to following steps:

(1) sets up the ultraviolet fingerprint principal component analysis model of essence sample for tobacco to be measured

Step 1 is gathered the uv absorption spectra of essence sample for tobacco to be measured;

The ultraviolet spectrogram of the essence sample for tobacco to be measured that step 2 will collect adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

(2) prepare qualified data

Step 3 selects to be no less than 7 qualified samples;

Step 4 is set up the ultraviolet fingerprint principal component analysis model of qualified essence sample with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 5 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and each qualified samples distance H i to qualified samples SIMCA disaggregated model center, and calculate Si upper control limit and Hi upper control limit, lower control limit is 0;

(3) judge relatively

The ultraviolet fingerprint of the reconstruct that step 6 obtains in step 2 essence sample for tobacco to be measured with the qualified samples SIMCA disaggregated model that is obtained in the step 4 is 5% to carry out the SIMCA discriminant classification with level of significance, calculate essence sample for tobacco to be measured to qualified samples SIMCA disaggregated model apart from Si and essence sample for tobacco to be measured distance H i to qualified samples SIMCA disaggregated model center, have only when the essence sample to qualified samples SIMCA disaggregated model apart from Si less than Si upper control limit and essence sample for tobacco to be measured to the distance H i at qualified samples SIMCA disaggregated model center during less than the Hi upper control limit this essence sample for tobacco to be measured qualified, otherwise this essence sample for tobacco to be measured is defective.

Further technical scheme is the wavelength coverage of the UV scanning when gathering essence sample for tobacco uv absorption spectra to be measured: 190～450nm, wavelength interval 1nm; Quartz colorimetric utensil light path: 0.1cm; Each sample scanning 7 times.

Further technical scheme be in the step 5 the Si upper control limit be each qualified samples to qualified samples SIMCA disaggregated model apart from peaked three times of Si, the Hi upper control limit is each qualified samples to peaked three times of the distance at qualified samples SIMCA disaggregated model center.

Further technical scheme is each qualified essence sample directly obtaining from database apart from Si and the distance H i of each qualified essence sample to qualified samples SIMCA disaggregated model center to qualified samples SIMCA disaggregated model in the step 5.

Further technical scheme is after the step 6, with the essence sample for tobacco to be measured of test passes joining in the database apart from the essence sample for tobacco to be measured of Si and the test passes distance H i to qualified samples SIMCA disaggregated model center to qualified samples SIMCA disaggregated model.

Further technical scheme is that the primary data in the database is to select at least seven batches of qualified essence sample for tobacco for use, carries out according to following steps:

Step 7 is gathered the uv absorption spectrogram of qualified essence sample for tobacco;

The spectrogram that step 8 will collect qualified essence sample adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

Step 9 is set up the ultraviolet fingerprint principal component analysis model of essence sample for tobacco to be measured with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 10 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and qualified samples distance H i to qualified samples SIMCA disaggregated model center;

Step 11 deposits each qualified samples in database apart from Si and each qualified samples to the distance H i at qualified samples SIMCA disaggregated model center to qualified samples SIMCA disaggregated model.

Further technical scheme is that Si upper control limit and Hi upper control limit obtain according to following steps in the step 5:

Step 12 is gathered the uv absorption spectra of at least 7 batches of qualified essence samples;

The spectrogram that step 13 will collect qualified essence sample adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

Step 14 is set up the ultraviolet fingerprint principal component analysis model of qualified essence sample with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 15 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and qualified samples distance H i to qualified samples SIMCA disaggregated model center.

Compared with prior art, the invention has the beneficial effects as follows and detect the global feature that has reflected flavouring essence for tobacco that the detecting instrument of use is few, method is simple, can field quick detection.

Embodiment

Below the present invention is further elaborated.

Select for use 7 different batches to set up standard database through the essence sample for tobacco of the sample that is up to the standards, calculate according to step 7 to step 11, in level of significance be obtain under 5% the condition all qualified essence sample for tobacco to qualified samples SIMCA disaggregated model apart from Si and each qualified essence sample for tobacco distance H i to qualified samples SIMCA disaggregated model center, result of calculation sees Table 1:

The sample sequence number	S1	S2	S3	S4	S5	S6	S7
								Si	0.00029	0.00004	0.00017	0.00027	0.00039	0.00048	0.00047
Hi	0.0436	0.0053	0.0266	0.0405	0.0623	0.0766	0.0756

Table 1

With qualified essence sample for tobacco to qualified samples SIMCA disaggregated model apart from Si peaked three times 0.00144 as the Si upper control limit, qualified essence sample for tobacco to the distance H i at qualified samples SIMCA disaggregated model center peaked three times 0.2299 as Hi upper control limit UCL.

10 batches of sample 1#～10# with to be measured measure according to step 1 to step 3, obtain ultraviolet fingerprint, and according to the Si and the Hi value of the SIMCA disaggregated model of all samples in step 6 calculating and the database, result of calculation sees Table 2 again:

The sample sequence number

#1

#2

#3

#4

#5

Si	0.00081	0.00092	0.00084	0.00065	0.00039
						Hi	0.0172	0.0192	0.0176	0.0141	0.0116
The sample sequence number	#6	#7	#8	#8	#10
						Si	0.00033	0.02723	0.02767	0.02832	0.02804
Hi	0.091	4.642	4.753	5.351	5.390

Table 2

Adjudicate according to step 6, the Si of 1#～6# sample is all less than Si upper control limit 0.00144, and Hi is all less than Hi upper control limit 0.2299, and 1#～6# sample is qualified.The Si of 7#～10# sample is all greater than Si upper control limit 0.00144, and Hi all beats in Hi upper control limit 0.2299, and 7#～10# sample is defective.

1#～6# sample is deposited into database to the Si and the Hi value of SIMCA disaggregated model, finishes new database, use when being used for detecting from now on, new database sees Table 3:

The sample sequence number	S1	S2	S3	S4	S5	S6	S7
								Si	0.00029	0.00004	0.00017	0.00027	0.00039	0.00048	0.00047
Hi	0.0436	0.0053	0.0266	0.0405	0.0623	0.0766	0.0756
								The sample sequence number	S8	S9	S10	S11	S12	S13
Si	0.00081	0.00092	0.00084	0.00065	0.00039	0.00033
								Hi	0.0172	0.0192	0.0176	0.0141	0.0116	0.091

Table 3

Claims (7)

1, a kind of detection method of flavouring essence for tobacco is characterized in that according to following steps:

(1) sets up the ultraviolet fingerprint principal component analysis model of essence sample for tobacco to be measured

Step 1 is gathered the uv absorption spectra of essence sample for tobacco to be measured;

The ultraviolet spectrogram of the essence sample for tobacco to be measured that step 2 will collect adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

(2) prepare qualified data

Step 3 selects to be no less than 7 qualified samples;

Step 4 is set up the ultraviolet fingerprint principal component analysis model of qualified essence sample with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 5 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and each qualified samples distance H i to qualified samples SIMCA disaggregated model center, and calculate Si upper control limit and Hi upper control limit, lower control limit is 0;

(3) judge relatively

The ultraviolet fingerprint of the reconstruct that step 6 obtains in step 2 essence sample for tobacco to be measured with the qualified samples SIMCA disaggregated model that is obtained in the step 4 is 5% to carry out the SIMCA discriminant classification with level of significance, calculate essence sample for tobacco to be measured to qualified samples SIMCA disaggregated model apart from Si and essence sample for tobacco to be measured distance H i to qualified samples SIMCA disaggregated model center, have only when the essence sample to qualified samples SIMCA disaggregated model apart from Si less than Si upper control limit and essence sample for tobacco to be measured to the distance H i at qualified samples SIMCA disaggregated model center during less than the Hi upper control limit this essence sample for tobacco to be measured qualified, otherwise this essence sample for tobacco to be measured is defective.

2, the detection method of flavouring essence for tobacco according to claim 1, the wavelength coverage of the UV scanning when it is characterized in that described collection essence sample for tobacco uv absorption spectra to be measured: 190～450nm, wavelength interval 1nm; Quartz colorimetric utensil light path: 0.1cm; Each sample scanning 7 times.

3, the detection method of flavouring essence for tobacco according to claim 2, it is characterized in that Si upper control limit in the described step 5 be each qualified samples to qualified samples SIMCA disaggregated model apart from peaked three times of Si, the Hi upper control limit is each qualified samples to peaked three times of the distance at qualified samples SIMCA disaggregated model center.

4, the detection method of flavouring essence for tobacco according to claim 3 is characterized in that each qualified essence sample directly obtaining apart from Si and the distance H i of each qualified essence sample to qualified samples SIMCA disaggregated model center to qualified samples SIMCA disaggregated model in the described step 5 from database.

5, the detection method of flavouring essence for tobacco according to claim 4, it is characterized in that after the described step 6, with the essence sample for tobacco to be measured of test passes joining in the database to qualified samples SIMCA disaggregated model apart from the essence sample for tobacco to be measured of Si and test passes distance H i to qualified samples SIMCA disaggregated model center.

6, the detection method of flavouring essence for tobacco according to claim 5 is characterized in that the primary data in the described database is to select at least seven batches of qualified essence sample for tobacco for use, carries out according to following steps:

Step 7 is gathered the uv absorption spectrogram of qualified essence sample for tobacco;

The spectrogram that step 8 will collect qualified essence sample adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

Step 9 is set up the ultraviolet fingerprint principal component analysis model of essence sample for tobacco to be measured with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 10 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and qualified samples distance H i to qualified samples SIMCA disaggregated model center;

Step 11 deposits each qualified samples in database apart from Si and each qualified samples to the distance H i at qualified samples SIMCA disaggregated model center to qualified samples SIMCA disaggregated model.

7, the detection method of cigarette essence according to claim 3 is characterized in that Si upper control limit and Hi upper control limit obtain according to following steps in the described step 5:

Step 12 is gathered the uv absorption spectra of at least 7 batches of qualified essence samples;

The spectrogram that step 13 will collect qualified essence sample adopts S-G smoothly to be reconstructed ultraviolet fingerprint in conjunction with first order derivative;

Step 14 is set up the ultraviolet fingerprint principal component analysis model of qualified essence sample with the Principal Component Analysis Method in the Chemical Measurement multivariable analysis, obtains qualified samples SIMCA disaggregated model;

Step 15 in level of significance be calculate under 5% the condition each qualified samples to qualified samples SIMCA disaggregated model apart from Si and qualified samples distance H i to qualified samples SIMCA disaggregated model center.