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Identification method of precious rosewood based on chemical fingerprint

A technology of fingerprints and chemical fingerprints, applied in scientific instruments, measuring devices, instruments, etc., can solve problems such as subjective uncertainty, great difference in function and value, time-consuming and labor-intensive problems, and achieve accurate and reliable results

Inactive Publication Date: 2011-11-16
TONGJI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different varieties of mahogany have similar appearances, but their functions and values ​​are quite different. The mahogany sold in the market often appears to be shoddy. Therefore, it is necessary to identify the authenticity of different mahogany species.
At present, the methods for identifying precious mahogany are mainly based on the traditional botanical classification method based on artificial experience, that is, the biological microstructure retrieval table and computer image processing method, and the apparent morphology based on physical indicators such as gloss and chroma on the wood surface. Manual discrimination methods, these methods are not only time-consuming and laborious, but also have subjective uncertainties in the results, and misjudgment will inevitably occur

Method used

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  • Identification method of precious rosewood based on chemical fingerprint
  • Identification method of precious rosewood based on chemical fingerprint
  • Identification method of precious rosewood based on chemical fingerprint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1 Obtain fingerprints of standard samples and unknown samples

[0045] 1.1 Sample pretreatment

[0046] A. cut 4 kinds of standard mahogany samples and 2 kinds of unknown mahogany heartwood samples as embodiments into thin slices with a carving knife, weigh 1.0g in a 50ml Erlenmeyer flask with a stopper;

[0047] b. Add 20ml of absolute ethanol, ultrasonically extract for 25min and then filter, add 20ml of absolute ethanol to the filter residue, ultrasonically extract again for 25min and then filter, combine the two filtrates as the stock solution;

[0048] c. Take 10ml of the stock solution in a sample bottle, and concentrate to remove all solvents by nitrogen blowing;

[0049] d. Add 1 ml of absolute ethanol, filter through an organic phase microporous membrane (0.45 μm), and place in a 2 ml standard sample bottle.

[0050] 1.2 Acquisition of gas chromatography (GC-FID) fingerprints

[0051] The GC-FID parameters were set as follows:

[0052] Injector Temperature ...

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Abstract

The invention relates to an identification method of precious rosewood based on chemical fingerprint. The method provided by the invention is based on the chemical composition of the wood and can identify the precious rosewood at molecular level by virtue of chemometrics. The method includes ultrasonic extraction, nitrogen-blow concentration, etc. Sample chromatogram of the precious rosewood is collected by GC-FID, then PCA projection is carried out on the obtained chromatogram after being pretreated, thus obtaining identification result. The method realizes identification on unknown rosewoodsample, and the result is accurate and reliable.

Description

technical field [0001] The invention relates to a method for identifying the authenticity of precious mahogany based on chemical fingerprints. Background technique [0002] Mahogany is the raw material of precious furniture and arts and crafts. Because it takes hundreds of years to become a material, and its material is durable and can emit a certain fragrance, it has high market value and practical value. However, different varieties of mahogany are similar in appearance, but their functions and values ​​are quite different. The mahogany sold in the market is often shoddy. Therefore, it is necessary to identify the authenticity of different mahogany species. At present, the methods for identifying precious mahogany are mainly based on the traditional botanical classification method based on artificial experience, that is, the biological microstructure retrieval table and computer image processing method, and the apparent morphology based on physical indicators such as gloss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/30G01N30/88
Inventor 冯昕韡李艳艳沈梦洁朱仲良
Owner TONGJI UNIV
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