CN108709869A - A kind of detection method of fresh ginseng water content - Google Patents
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- CN108709869A CN108709869A CN201810205585.9A CN201810205585A CN108709869A CN 108709869 A CN108709869 A CN 108709869A CN 201810205585 A CN201810205585 A CN 201810205585A CN 108709869 A CN108709869 A CN 108709869A
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- 235000008434 ginseng Nutrition 0.000 title claims abstract description 111
- 241000208340 Araliaceae Species 0.000 title claims abstract description 108
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 title claims abstract description 108
- 235000003140 Panax quinquefolius Nutrition 0.000 title claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 22
- 230000003595 spectral effect Effects 0.000 claims abstract description 9
- 238000004611 spectroscopical analysis Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000000523 sample Substances 0.000 claims description 90
- 238000001228 spectrum Methods 0.000 claims description 34
- 239000002689 soil Substances 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 10
- 238000000643 oven drying Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 10
- 238000002835 absorbance Methods 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 238000004445 quantitative analysis Methods 0.000 description 6
- 238000010835 comparative analysis Methods 0.000 description 4
- 240000004371 Panax ginseng Species 0.000 description 3
- 235000002789 Panax ginseng Nutrition 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
Abstract
A kind of detection method of fresh ginseng water content, belongs to Chinese medicine quality of production detection technique field.The problem of sample and detection time length need to be destroyed when being detected for current fresh ginseng water content, the present invention provides a kind of aqueous quantity measuring methods of fresh ginseng, include the following steps：Acquisition standard fresh ginseng sample, near-infrared diffuses spectrometry to the progress spectral scan of standard fresh ginseng sample, the original atlas of near infrared spectra of acquisition standard fresh ginseng sample, conventional detection is carried out to the water content in fresh ginseng sample, obtain the actual value of its water content, the original near infrared spectrum of fresh ginseng sample is associated with water content actual value, it is calculated by Chemical Measurement, the near infrared detection model of fresh ginseng water content is established, and unknown fresh ginseng water content is detected using the model.The present invention is suitable for the measurement of fresh ginseng water content.
Description
Technical field
The invention belongs to Chinese medicine quality of production detection technique fields, and in particular to a kind of detection side of fresh ginseng water content
Method.
Background technology
Currently, being mostly oven drying method for the detection method of water content in fresh ginseng, need to be put into baking after shredding fresh ginseng
5 more than hour are heated in case, there are destruction sample, the shortcomings of detection cycle is long.
Invention content
The problem of sample and detection time length need to be destroyed when being detected for current fresh ginseng water content, the present invention provides one
The detection method of kind fresh ginseng water content, specifically comprises the following steps：
1) acquisition of standard fresh ginseng sample；
2) near infrared spectra collection diffuses spectrometry to standard fresh ginseng sample progress near infrared spectrum by near-infrared
Acquisition obtains the original atlas of near infrared spectra of standard fresh ginseng sample；
3) standard fresh ginseng sample moisture content actual value measures；
4) model foundation：The original near infrared spectrum of fresh ginseng sample that step 1) obtains is closed with water content actual value
Connection, establishes fresh ginseng water content near infrared detection model；
5) unknown fresh ginseng water content is detected using above-mentioned model.
Preferably, step 1) the standard fresh ginseng sample is the raw farmland soils of 4-5 and the fertile soil fresh ginseng in 7-9 months
Combination.
Preferably, the step 2) near-infrared diffuse spectrometry refer to using near infrared spectrometer to standard sample carry out
Spectra collection, solid fiber probe is close to fresh ginseng main root surface when acquisition, each 2 light of acquisition at main root surface 1/3 and 2/3
Spectrum, takes final near infrared spectrum of the average value of above-mentioned 4 spectrum as this standard sample.
Preferably, when the solid fiber probe acquires at main root surface 1/3 and 2/3, pickup area is diameter 5mm
Circle.
Preferably, step 2) the spectra collection condition：Resolution ratio 8cm-1, number of sample scan 64 times, spectral frequency model
It encloses for 12500cm-1-4000cm-1。
Preferably, the spectral frequency range 9997.8cm of the step 2) spectra collection-1-7498.3cm-1、5774.2cm-1-5446.3cm-1、1249.3cm-1-7498.3cm-1Or 6102.1cm-1-5774.2cm-1。
Preferably, step 3) the samples of Ginseng moisture determination uses oven drying method, the specific steps are：Take test sample 2-
5g is laid in drying to the flat measuring cup of constant weight, and thickness is no more than 5mm, and loose test sample is no more than 10mm, and precision claims
Fixed, open bottle cover is 5 hours dry at 100-105 DEG C, and bottle cap is covered, in dislocation drier, is let cool 30 minutes, accurately weighed,
It is dried 1 hour in above-mentioned temperature again, lets cool, weigh, until the difference weighed twice in succession is no more than 5mg, according to less loss
Weight calculates water content in test sample.
Preferably, the foundation of the near infrared detection model of step 4) the fresh ginseng water content uses offset minimum binary
Method.
Preferably, the data processing method of the near infrared detection model of step 4) the fresh ginseng water content is stoichiometry
It learns, the analysis software that data processing uses is OPUS Version 6.5.
Preferably, the data processing method of the Chemical Measurement is first derivative, vector normalization method, polynary scattering school
One kind of center or in which several combinations.
Advantageous effect
The present invention is a kind of quick, lossless detection method of fresh ginseng water content, by near-infrared diffuse spectrometry without
Fresh ginseng sample need to be destroyed and can be obtained by its internal spectral information, and detection speed is fast, one sample moisture content of detection only needs
A few minutes are wanted, solve in conventional fresh ginseng water content detection process the shortcomings of destruction and long detection cycle to sample, are reduced
Cost in detection process, while detecting system can also move to planting site, it carries out the place of production and detects in real time, improve detection
Efficiency realizes the real-time control of fresh ginseng product quality.
Description of the drawings
Fig. 1 fresh ginseng water content near infrared detection model foundation flow charts.
Near-infrared primary light spectrogram in Fig. 2 fresh ginseng water content models, ordinate are absorbance, and abscissa is wave number,
Unit cm-1。
Fig. 3 fresh ginseng unknown sample primary light spectrograms, ordinate are absorbance, and abscissa is wave number unit cm-1。
Related figure between Fig. 4 predicted values and actual value, abscissa is actual value, and ordinate is predicted value.
Specific implementation mode
Fresh ginseng water content testing process of the present invention is as shown in Figure 1, below in conjunction with case is embodied into one
Step illustrates the present invention, but the scope of protection of present invention is not limited to following case study on implementation.
Embodiment 1：The detection method of fresh ginseng water content.
1) acquisition of standard fresh ginseng sample：
The 4-5 for acquiring Tonghua, Jilin Province county Jian regional July gives birth to totally 147 parts of farmland soil and fertile soil fresh ginseng,
In totally 139 parts of fresh ginseng sample for modeling, including farmland soil 56 parts of life in 5 years, 46 parts of fertile soil life in 4 years and fertile soil life in 5 years
37 parts, it is identified as the rhizome of ginseng (Panax ginseng C.A.Mey).Fresh ginseng surface soil is cleaned, hermetic bag is close
Being honored as a queen, it is spare to be put into 4 DEG C of refrigerators.
2) near infrared spectra collection：
The all samples of step 1) acquisition are popped one's head in by solid fiber respectively and acquire spectrum, the light that light source is sent out is by incidence
Fiber optic conduction, which goes out, is radiated at sample surfaces, the circle that irradiation area diameter is about 5mm, and in internal diffusion, is come out from internal diffusion
Light spectrometer is imported by reception optical fiber.It being first corrected before acquisition spectrum, solid fiber probe is close to fresh ginseng main root surface,
2 spectrum are respectively acquired at main root surface 1/3 and 2/3, i.e., acquire 4 near infrared spectrums on each fresh ginseng main root, take this 4 light
Final near infrared spectrum of the average value of spectrum as this sample, i.e. near-infrared primary light spectrogram, spectra collection condition：Resolution ratio
8cm-1, number of sample scan 64 times, spectral region 12500cm-1-4000cm-1.As a result spectrogram is absorbance, the data of preservation
Block is absorbance, single channel spectrum, background etc..
3) standard fresh ginseng sample moisture content actual value measures：
The water content in fresh ginseng is measured by 0832 the second method of aquametry (oven drying method) in Chinese Pharmacopoeia 2015 editions.
Test sample 2-5g is taken, is laid in drying to the flat measuring cup of constant weight, thickness is no more than 5mm, and loose test sample is no more than
10mm, accurately weighed, open bottle cover is 5 hours dry at 100-105 DEG C, and bottle cap is covered, in dislocation drier, lets cool 30 points
Clock, it is accurately weighed, then dried 1 hour in above-mentioned temperature, it lets cool, weighs, until the difference weighed twice in succession is no more than 5mg
Only.According to the weight of less loss, water content (%) in test sample is calculated, water content statistics is shown in Table 1 in fresh ginseng sample：
Water content counts in 1 fresh ginseng sample of table
| Month | Water content ranges (%) | Average value (%) |
| 7 | 56.86-81.61 | 65.956 |
4) model foundation：
Using 6.5 analysis softwares of OPUS Version handle data, by the sample near-infrared original spectrum of acquisition with it is aqueous
Amount actual value is associated, and is established fresh ginseng water content near infrared detection model using existing Partial Least Squares, is excluded different
Constant value, carries out quantitative analysis, and quantitative analysis method optimization is as follows：First derivative；Smooth points：17；Frequency range：
9997.8cm-1-7498.3cm-1, 5774.2cm-1-5446.3cm-1；Examine type：Crosscheck；Dimension：9；R2：81.99；
RMSECV：1.59；RPD：2.36.
By intersecting and examining, predicted value and the deviation for obtaining model are as follows：
5) unknown fresh ginseng sample moisture content prediction：
By the spectrogram of method acquisition unknown sample 1-8 in step 2), the fresh ginseng water content quantitative model of foundation is recalled,
Data are handled using OPUS Version6.5 analysis softwares, carrying out forecast analysis to the water content of unknown sample obtains predicted value,
Unknown sample water content is measured to obtain actual value by method in step 3), by the actual value of unknown sample and predicted value into
Row comparative analysis, it is known that there was no significant difference between actual value and predicted value (P=0.9938 > 0.05), judges the model established
It can be used for the detection of water content in fresh ginseng.
Unknown sample water content predicted value and actual value comparative analysis are as follows：
Embodiment 2：The detection method of fresh ginseng water content.
1) acquisition of standard fresh ginseng sample：
Totally 321 parts of the raw farmland soils of 4-5 and fertile soil fresh ginseng of Tonghua, Jilin Province county Jian area August part are acquired,
In totally 279 parts of fresh ginseng sample for modeling, including farmland soil 109 parts of life in 5 years, fertile soil 95 parts of life in 4 years, fertile soil life in 5 years
75 parts.It is identified as the rhizome of ginseng (Panax ginseng C.A.Mey).Fresh ginseng surface soil is cleaned, hermetic bag is close
Being honored as a queen, it is spare to be put into 4 DEG C of refrigerators.
2) near infrared spectra collection：
The all samples of step 1) acquisition are popped one's head in by solid fiber respectively and acquire spectrum, the light that light source is sent out is by incidence
Fiber optic conduction, which goes out, is radiated at sample surfaces, the circle that irradiation area diameter is about 5mm, and in internal diffusion, is come out from internal diffusion
Light spectrometer is imported by reception optical fiber.It is first corrected before acquisition spectrum, solid fiber probe should be close to fresh ginseng main root table
Face, each 2 spectrum of acquisition at main root surface 1/3 and 2/3, i.e., 4 near infrared spectrums of acquisition on each fresh ginseng main root, take this 4
Final near infrared spectrum of the average value of a spectrum as this sample.
Spectra collection condition：Resolution ratio 8cm-1, number of sample scan 64 times, spectral region 12500cm-1-4000cm-1。
As a result spectrogram is absorbance, and the data block of preservation is absorbance, single channel spectrum, background etc..
3) water content actual value measures：
The water content in fresh ginseng is measured by 0832 the second method of aquametry (oven drying method) in Chinese Pharmacopoeia 2015 editions.
Test sample 2-5g is taken, is laid in drying to the flat measuring cup of constant weight, thickness is no more than 5mm, and loose test sample is no more than
10mm, accurately weighed, open bottle cover is 5 hours dry at 100-105 DEG C, and bottle cap is covered, in dislocation drier, lets cool 30 points
Clock, it is accurately weighed, then dried 1 hour in above-mentioned temperature, it lets cool, weighs, until the difference weighed twice in succession is no more than 5mg
Only.According to the weight of less loss, water content (%) in test sample is calculated, water content statistics is shown in Table 2 in fresh ginseng sample：
Water content counts in 2 fresh ginseng sample of table
| Month | Water content ranges (%) | Average value (%) |
| 8 | 56.59-83.20 | 67.642 |
4) model foundation：
Using 6.5 analysis softwares of OPUS Version handle data, by the sample near-infrared original spectrum of acquisition with it is aqueous
Amount actual value is associated, and fresh ginseng water content near infrared detection model is established using existing Partial Least Squares, by August part
Spectroscopic data add in the model in July, exclude exceptional value, carry out quantitative analysis, quantitative analysis method optimization it is as follows：One
Order derivative+vector normalization method；Smooth points：17；Frequency range：1249.3cm-1-7498.3cm-1, 6102.1cm-1-
5774.2cm-1；Examine type：Crosscheck；Dimension：9；R2：89.4；RMSECV：1.24；RPD：3.07.
By intersecting and examining, predicted value and the deviation for obtaining model are as follows：
5) unknown fresh ginseng sample moisture content prediction：
By the spectrogram of method acquisition unknown sample 1-40 in step 2), 4 near infrared spectrums of each sample collection take it
Averaged spectrum recalls the fresh ginseng water content quantitative model of foundation, and data are handled using 6.5 analysis softwares of OPUS Version,
Forecast analysis is carried out to the water content of unknown sample and obtains predicted value, unknown sample water content is surveyed by method in step 3
Surely actual value is obtained, the actual value of unknown sample and predicted value are compared analysis, it is known that nothing between actual value and predicted value
Significant difference (P=0.7908 > 0.05) judges that the model established can be used for the detection of water content in fresh ginseng.
Unknown sample water content predicted value and actual value comparative analysis are as follows：
The detection method of 3. fresh ginseng water content of embodiment.
1) acquisition of standard fresh ginseng sample：
Totally 486 parts of the raw farmland soils of 4-5 and fertile soil fresh ginseng of Tonghua, Jilin Province county Jian area September part are acquired,
In totally 436 parts of fresh ginseng sample for modeling, including farmland soil 144 parts of life in 5 years, 155 parts of fertile soil life in 4 years and fertile soil 5 years
It is 137 parts raw, it is identified as the rhizome of ginseng (Panax ginseng C.A.Mey).Fresh ginseng surface soil is cleaned, hermetic bag
It is spare that 4 DEG C of refrigerators are put into after sealing.
2) near infrared spectra collection：
The all samples that step 1 is acquired are popped one's head in by solid fiber acquire spectrum respectively, and the light that light source is sent out is by incidence
Fiber optic conduction, which goes out, is radiated at sample surfaces, the circle that irradiation area diameter is about 5mm, and in internal diffusion, is come out from internal diffusion
Light spectrometer is imported by reception optical fiber.It is first corrected before acquisition spectrum, solid fiber probe should be close to fresh ginseng main root table
Face, each 2 spectrum of acquisition at main root surface 1/3 and 2/3, i.e., 4 near infrared spectrums of acquisition on each fresh ginseng main root, take this 4
Final near infrared spectrum of the average value of a spectrum as this sample, i.e. near-infrared primary light spectrogram, as shown in Figure 2.
Spectra collection condition：Resolution ratio 8cm-1, number of sample scan 64 times, spectral region 12500cm-1-4000cm-1。
As a result spectrogram is absorbance, and the data block of preservation is absorbance, single channel spectrum, background etc..
3) water content actual value measures：
The water content in fresh ginseng is measured by 0832 the second method of aquametry (oven drying method) in Chinese Pharmacopoeia 2015 editions.
Test sample 2-5g is taken, is laid in drying to the flat measuring cup of constant weight, thickness is no more than 5mm, and loose test sample is no more than
10mm, accurately weighed, open bottle cover is 5 hours dry at 100-105 DEG C, and bottle cap is covered, in dislocation drier, lets cool 30 points
Clock, it is accurately weighed, then dried 1 hour in above-mentioned temperature, it lets cool, weighs, until the difference weighed twice in succession is no more than 5mg
Only.According to the weight of less loss, water content (%) in test sample is calculated, water content statistics is shown in Table 3 in fresh ginseng sample：
Water content counts in 3 fresh ginseng sample of table
| Month | Water content ranges (%) | Average value (%) |
| 9 | 57.95-84.11 | 68.97 |
4) model foundation：
Data processing use 6.5 analysis softwares of OPUS Version, by the sample near-infrared original spectrum of acquisition with it is aqueous
Amount actual value is associated, and fresh ginseng water content near infrared detection model is established using existing Partial Least Squares, by September part
Data continue to be added in the model of 7, August part, exclude exceptional value, carry out quantitative analysis, quantitative analysis method optimization it is as follows：
First derivative+multiplicative scatter correction；Smooth points：17；Frequency range：12493.4cm-1-7498.3cm-1；Examine type：It hands over
Fork is examined；Dimension：10；R2：90.58；RMSECV：1.17；RPD：3.26.
By intersecting and examining, predicted value and the deviation for obtaining model are as follows：
5) unknown fresh ginseng sample moisture content prediction：
By the spectrogram of method acquisition unknown sample 1-100 in step 2), as shown in figure 3, each sample collection 4 is close red
External spectrum takes its averaged spectrum, recalls the fresh ginseng water content quantitative model of foundation, is analyzed using OPUS Version 6.5 soft
Part handles data, and carrying out forecast analysis to the water content of unknown sample obtains predicted value, by method in step 3) to unknown sample
Water content is measured to obtain actual value, and the actual value of unknown sample and predicted value are compared analysis, it is known that actual value and
There was no significant difference between predicted value (P=0.9835 > 0.05), as shown in figure 4, the model that judgement is established can be used for fresh ginseng
The detection of middle water content.
Unknown sample water content predicted value and actual value comparative analysis are as follows：
In conclusion present invention application near infrared detection method can realize fresh people under the premise of not damaging ginseng tissue
Quick, the non-destructive testing for joining water content, greatly shorten detection cycle.
Claims (10)
1. a kind of detection method of fresh ginseng water content, which is characterized in that include the following steps：
1) acquisition of standard fresh ginseng sample；
2) near infrared spectra collection, by near-infrared diffuse spectrometry to standard fresh ginseng sample carry out near infrared spectrum adopt
Collection obtains the original atlas of near infrared spectra of standard fresh ginseng sample；
3) standard fresh ginseng sample moisture content actual value measures；
4) the original near infrared spectrum of fresh ginseng sample that step 1) obtains is associated by model foundation with water content actual value,
Establish fresh ginseng water content near infrared detection model；
5) unknown fresh ginseng water content is detected using above-mentioned model.
2. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that the step 1) standard
Fresh ginseng sample is the raw farmland soil fresh ginsengs of 4-5 and the fertile soil fresh ginseng in 7-9 months.
3. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that step 2) is described close red
The outer spectrometry that diffuses refers to carrying out spectra collection to standard sample using near infrared spectrometer, and solid fiber probe is tightly when acquisition
Fresh ginseng main root surface is pasted, 2 spectrum are respectively acquired at main root surface 1/3 and 2/3, take the average value conduct of above-mentioned 4 spectrum
The final near infrared spectrum of this standard sample.
4. a kind of detection method of fresh ginseng water content according to claim 3, which is characterized in that the solid fiber is visited
When head acquires at main root surface 1/3 and 2/3, pickup area is the circle of diameter 5mm.
5. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that the step 2) spectrum
Acquisition condition：Resolution ratio 8cm-1, number of sample scan 64 times, spectral frequency range 12500cm-1-4000cm-1。
6. a kind of detection method of fresh ginseng water content according to claim 5, which is characterized in that the step 2) spectrum
The spectral frequency range of acquisition is 9997.8cm-1-7498.3cm-1、5774.2cm-1-5446.3cm-1、1249.3cm-1-
7498.3cm-1Or 6102.1cm-1-5774.2cm-1。
7. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that the step 3) people is fresh
Samples of Ginseng moisture determination uses oven drying method, the specific steps are：Test sample 2-5g is taken, the dry flat to constant weight is laid in and claims
In measuring bottle, thickness is no more than 5mm, and loose test sample is no more than 10mm, accurately weighed, and drying 5 is small at 100-105 DEG C for open bottle cover
When, bottle cap is covered, in dislocation drier, is let cool 30 minutes, it is accurately weighed, then dried 1 hour in above-mentioned temperature, it lets cool, claims
Weight, according to the weight of less loss, calculates water content in test sample until the difference weighed twice in succession is no more than 5mg.
8. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that step 4) the fresh people
The foundation for joining the near infrared detection model of water content uses Partial Least Squares.
9. a kind of detection method of fresh ginseng water content according to claim 1, which is characterized in that step 4) the fresh people
Join water content near infrared detection model data processing method be Chemical Measurement, the analysis software that data processing uses for
OPUS Version 6.5。
10. a kind of detection method of fresh ginseng water content according to claim 9, which is characterized in that the stoichiometry
Data processing method is first derivative, vector normalization method, one kind in multiplicative scatter correction or in which several combinations.
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2018
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| CN103776777A (en) * | 2014-01-09 | 2014-05-07 | 北京中医药大学 | Method for identifying ginsengs with different growth patterns by using near infrared spectrum technology and determining content of components in ginsengs |
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| 李莎等: "近红外光谱法定量分析半夏鲜品中水分含量", 《中国药师》 * |
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