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Finger-print chromatogram-based method for quickly and nondestructively identifying dalbergia louvelii mortise and tenon product

A technique of fingerprinting and comparing fingerprints, which is applied in the field of rapid and non-destructive identification of Lushi black rosewood mortise and tenon products, can solve the problems of unfavorable enterprise cost control and efficiency, human injury, cumbersome process, etc., and achieve the solution of micro-destructive sampling and solvent Easy to use, environmentally friendly, fast and easy to operate

Inactive Publication Date: 2018-02-23
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

[0004] At present, there are mainly two types of identification of Lushi Dalbergia products, one is the traditional manual identification method based on wood characteristics, and its technical defects are: ① Sampling requires professionals, the process is complicated and will seriously damage the appearance of the product; ② The manual identification method requires experts to identify wood species, but there are still subjective uncertainties; ③ the identification results are difficult to go deep into the "species" level for identification; ④ identification takes a long time, etc.
One is the identification method based on chemical composition, among which near-infrared and micro-destructive gas chromatography are widely used to identify mahogany species, but both of them need to be sampled, which will cause different degrees of appearance damage to the product. In addition, solvent extraction is used. It will cause harm to the human body, and the process is cumbersome, which is not conducive to the control of enterprise costs and the improvement of efficiency

Method used

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  • Finger-print chromatogram-based method for quickly and nondestructively identifying dalbergia louvelii mortise and tenon product
  • Finger-print chromatogram-based method for quickly and nondestructively identifying dalbergia louvelii mortise and tenon product
  • Finger-print chromatogram-based method for quickly and nondestructively identifying dalbergia louvelii mortise and tenon product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0022] The quartz fiber head of the solid-phase microextraction needle coated with the extraction stationary phase is subjected to aging treatment in the gas chromatographic inlet; (2) the anti-break stainless steel thin tube is placed at the mortise and tenon joint of Lushi black rosewood mortise and tenon product for solid phase extraction. Micro-extraction; (3) after balance, the fiber head was taken out and inserted into the gas chromatography inlet, and the sample injection was completed after thermal desorption of the adsorbed substances on the coating; (4) 13 different batches of Dalbergia lushii were supplied to The total ion current chromatogram (TIC) that sample sample measures by above-mentioned (1) (2) (3) step imports similarity evaluation software, in 13 batches, provide the fingerprint collection of sample (see figure 1 ) in S1 was selected as the reference spectrum, and after multi-point correction and automatic matching, the established common pattern represent...

Embodiment 2

[0028] The quartz fiber head of the solid-phase microextraction needle coated with the extraction stationary phase is subjected to aging treatment in the gas chromatographic inlet; (2) the anti-break stainless steel thin tube is placed at the mortise and tenon joint of Lushi black rosewood mortise and tenon product for solid phase extraction. Micro-extraction; (3) after balance, the fiber head was taken out and inserted into the gas chromatography inlet, and the sample injection was completed after thermal desorption of the adsorbed substances on the coating; (4) 13 different batches of Dalbergia lushii were supplied to The total ion current chromatogram (TIC) that sample sample measures by above-mentioned (1) (2) (3) step imports similarity evaluation software, in 13 batches, provide the fingerprint collection of sample (see figure 1 ) in S1 was selected as the reference spectrum, and after multi-point correction and automatic matching, the established common pattern represent...

Embodiment 3

[0032] The detection sample three is tested under chromatographic conditions according to the above-mentioned steps (1) (2) (3), and the total ion current chromatogram of the sample three is compared with the control fingerprint spectrum (see Figure 9 ), the similarity is 7%, which is far lower than 95%. If the similarity does not meet the requirements, it is not necessary to further compare the qualitative parameters of the characteristic chromatographic peaks to determine that the sample three is not a product of red sandalwood, but red sandalwood." Counterfeit".

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Abstract

The invention relates to a finger-print chromatogram-based method for quickly and nondestructively identifying a dalbergia louvelii mortise and tenon product. The method comprises the following steps:inserting quartz fibers coated with an extracted stationary phase into the mortise and tenon joint of a dalbergia louvelii mortise and tenon product through a broken-preventive stainless steel fine tube by adopting a direct extraction mode of solid phase micro-extraction; taking out the fiber head and inserting into a gas chromatographic feed opening after balance; and completing feeding after substances adsorbed on the coating are subjected to thermal desorption. According to the method, known total ion chromatogram of dalbergia louvelii sample extracts at different batches is guided into similarity evaluation software, and is subjected to multi-point correction and automatic matching to establish a common peak mode representing the general information of the dalbergia louvelii fingerprint chromatogram samples to serve as reference fingerprint chromatogram; the reference fingerprint is used as a 'finger', while the retaining time of the reference fingerprint characteristic chromatographic peak and characteristic ion fragments are used as 'print', so that a dalbergia louvelii mortise and tenon product is subjected to true and false identification. The method can be used for nondestructively sampling through a broken-preventive stainless steel fine tube by utilizing a direct extraction mode of solid phase micro-extraction to realize nondestructive detection in the true sense, is environment-friendly and solvent free, is quick and simple to operate, and has an irreplaceable social meaning and economic value in the aspect of nondestructive true and false identification of thedalbergia louvelii mortise and tenon products.

Description

technical field [0001] The invention relates to the technical field of identification of wood mortise and tenon products, in particular to a method for quickly and non-destructively identifying Lushi black rosewood tenon and tenon products based on fingerprints. Background technique [0002] The soul of traditional Chinese mahogany products is the mortise and tenon structure, which has the advantages of being durable, easy to disassemble and transport, easy to maintain, high quality and not easy to crack, so most mahogany products use mortise and tenon structure. [0003] Dalbergia louvelii belongs to the Dalbergia genus in the national standard mahogany. It is mainly produced in Madagascar. It is a diffuse-porous wood with inconspicuous growth rings. The heartwood is orange-red when it is newly cut. The scars are obvious, the difference between the heart and sapwood is obvious, the texture is black and white, until shallowly interlaced, because the wood structure is extreme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/8809
Inventor 罗晓妍陈智勇黄明华郭佳马新年胡传宝
Owner 中山市中广测协同创新中心
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