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A method for identifying the species of Dalbergia bali with minimal damage based on fingerprints

A fingerprint and species technology, applied in the field of wood identification, can solve the problems of complicated process, large sampling amount, far difference in function and value, etc., and achieve the effect of easy repair and accurate identification results.

Active Publication Date: 2017-07-21
中山市中广测协同创新中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different varieties of mahogany are similar in appearance, but their functions and values ​​are quite different. As a result, there are often phenomena in the market where Barry rosewood wood products are shoddy with other low-grade woods. Therefore, it is necessary to identify the authenticity of Barry rosewood wood.
[0004] At present, the identification of Palisoleum wood is based on the manual identification method of wood characteristics. The technical defects are: ① Professionals are required to take representative samples, the process is complicated and will seriously damage the appearance of furniture, making it difficult to restore the furniture to its original state
②Manual discrimination requires experts to identify wood species, but there are still subjective uncertainties, and misjudgment will inevitably occur
③The identification result only distinguishes the "category", and it is difficult to go deep into the level of "species" for identification
[0005] Although someone has developed a fingerprint method to identify mahogany furniture, but because it is a slice sampling, the sampling volume is large, which will destroy the appearance and function of wood or furniture.
In addition, it uses a simple gas chromatograph to measure the shape of the fingerprints. Those skilled in the art know that the gas chromatograph is only a "finger" spectrum, and the qualitative parameter is the retention time of the characteristic peak. There is only identification of "fingers", but no identification of "pattern". If there is a large difference in the content of a certain component, it will cause misjudgment, so the identification method is difficult to meet the requirements of consumers.

Method used

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  • A method for identifying the species of Dalbergia bali with minimal damage based on fingerprints
  • A method for identifying the species of Dalbergia bali with minimal damage based on fingerprints
  • A method for identifying the species of Dalbergia bali with minimal damage based on fingerprints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: 1. Follow the steps (1.1) (1.2) in the pretreatment method of the above-mentioned standard sample to obtain the GC-MS 3D fingerprint of sample 1 (such as figure 2 ), and the matching table of the chemical substance information of the characteristic peaks of the spectrum and Table 1, as shown in Table 2 below.

[0054] Table 2

[0055]

[0056] 2. Identification

[0057] According to the chemical substance information table (Table 2) and Table 1 and figure 1 and figure 2 From the comparison, it can be seen that: ① The consistency of the retention time (D1) requires an allowable deviation of ±0.5min, which meets the requirements. ② The consistency of the mass spectrum (D2) is that the search matching rate is greater than 90%, among which there are ten characteristic peaks whose mass spectrum matching rate is less than 90%, and the mass spectrum matching rate of thirteen characteristic peaks are greater than 90%, which do not meet the requirements. ...

Embodiment 2

[0058] Embodiment 2: 1. Follow the steps (1.1) (1.2) in the pretreatment method of the above-mentioned standard sample to obtain the GC-MS 3D fingerprint of sample 2 (such as image 3 shown), and the matching table of the chemical substance information of the characteristic peaks of the spectrum compared with Table 1, as shown in Table 3 below.

[0059] table 3

[0060]

[0061] 2 identification

[0062] According to the chemical substance information table (Table 3) and Table 1 and figure 1 and image 3 From the comparison, it can be seen that: ① The consistency of the retention time (D1) requires an allowable deviation of ±0.5min, which meets the requirements. ② The consistency of the mass spectrum (D2) is that the search matching rate is greater than 90%, among which the mass spectrum matching rate of one characteristic peak is less than 90%, and the mass spectrum matching rate of 22 characteristic peaks is greater than 90%, which meets the requirements. ③ The accur...

Embodiment 3

[0063] Example 3: 1. Follow the steps (1.1) (1.2) in the pretreatment method of the above-mentioned standard sample for the test sample 3 to obtain the GC-MS 3D fingerprint of the sample 3 (such as Figure 4 ), and the matching table of the chemical substance information of the characteristic peaks of the spectrum and Table 1, as shown in Table 4 below.

[0064] Table 4

[0065]

[0066] 2. Identification

[0067] According to the chemical substance information table (Table 4) and Table 1 and figure 1 and Figure 4 The comparison shows that: ① The consistency of the retention time (D1) requires a tolerance of ±0.5min, and the retention time deviation of the characteristic peak 6 (4-methoxy-1,2-benzenediol) is greater than 0.5min, which is listed as a suspicious characteristic peak . ② The consistency of the mass spectrum (D2) is that the search matching rate is greater than 90%, among which the matching rate of mass spectrum of seventeen characteristic peaks is less th...

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Abstract

The invention relates to a method for identifying the dalbergia bariensis species in a microdamage mode based on a fingerprint spectrum. The method includes the steps that micropore sampling is conducted with a drill bit, a sample to be detected is added into solvent to be subjected to ultrasonic extraction, the retention time D1 of characteristic peaks, a mass spectrum D2 and the peak area D3 of a total ions chromatogram of an extraction solution serve as qualitative parameters to form the GC-MS 3D fingerprint spectrum, and then authenticity of the dalbergia bariensis species sample is judged by checking matching consistency or similarity between the characteristic peaks in the GC-MS 3D fingerprint spectrum of the sample to be detected and 3D data of characteristic peaks in a GC-MS 3D fingerprint spectrum of the standard dalbergia bariensis species. The unique mass spectrum D2 of organic matter is used as one of important qualitative parameters, the qualitative parameters D1 and D3 are added to form the 3D fingerprint spectrum, and multi-layer fingerprint confirmation ensures that an identification method is conducted on the dalbergia bariensis species to judge authenticity accurately. Authenticity of a dalbergia bariensis species product is judged through the method, and results are accurate and reliable; microdamage sampling is conducted, and the sampling amount is small, so that repair is easy, and the appearance of the product is not damaged.

Description

technical field [0001] The invention relates to the field of wood identification, in particular to a method for identifying the genus of Dalbergia dalbergia with minimal damage based on fingerprints. Background technique [0002] Barry rosewood (Latin: Dalbergia bariensis ), Papilionaceae Dalbergia, wood characteristics: ①The difference between heartwood and sapwood is obvious, and the newly cut surface of heartwood is purple reddish brown or dark reddish brown, often with dark brown or chestnut brown thin stripes. ② Diffuse porous wood, with a tendency of semi-ring porous wood. ③The cross-section wood rays and the axial parenchyma have obvious reticulation. ④ There are obvious dark landscape patterns on the surface of the board, and the spindle-shaped wood rays on the string section are arranged neatly and overlapped. ⑤ No or very weak sour aroma, fine structure, staggered texture, air-dry density 1.07-1.09g / cm 3 . [0003] Dalbergia palisander is the raw material of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06
CPCG01N30/06G01N30/88G01N2030/062
Inventor 仇镇武陈智勇黄明华胡传宝谢梅妍郭佳麦裔强吴铨洪闵雯
Owner 中山市中广测协同创新中心
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