A kind of bird's nest identification method

An identification method and bird's nest technology, applied in the direction of analysis using nuclear magnetic resonance, can solve the problems of long extraction and purification procedures, poor reproducibility, low accuracy, etc., to achieve easy analysis and further research, stable process flow, high Reproducible and characteristic effects

Active Publication Date: 2016-08-17
INSPECTION & QUARANTINE TECH CENT OF XIAMEN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these methods have low accuracy and low sensitivity; some extraction and purification procedures are lengthy and have poor reproducibility. Counterfeiters can get away with adding a certain sialic acid to the fake bird’s nest.

Method used

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  • A kind of bird's nest identification method
  • A kind of bird's nest identification method
  • A kind of bird's nest identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 ： NMR Identification of Bird's Nest

[0041] Materials and Reagents:

[0042] Deuterated water (Adamas, Switzerland), phosphoric acid (analytical grade, Sinopharm Group), test samples: Maoyan from Central and South Malaysia, East Coast Maoyan, East Malaysia Maoyan, North Malaysia Maoyan, Indonesian Xueyan, Indonesian hair swallow, fake white swallow, and fake blood swallow are all provided by Xiamen Entry-Exit Inspection and Quarantine Bureau; agar, tremella and pig skin. All test samples can be purchased in the market.

[0043] instrument:

[0044] AVANCE Ⅲ 600 superconducting nuclear magnetic resonance spectrometer (Bruker, Switzerland), electronic balance (accurate to 0.0001 g; Sartorious, Germany), electric furnace (Chaofeng CL-200, Jiangsu, China).

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Abstract

The invention provides a bird's nest identification method. It is characterized by adopting nuclear magnetic resonance detection. The steps are: pre-treat the sample to be identified: grind the sample to be identified into a fine powder, add 1% phosphoric acid aqueous solution containing more than 10% deuterium water to the fine powder, heat in a water bath in boiling water, and centrifuge after cooling; take the supernatant to In the 5 mm NMR tube, seal the NMR tube; set the technical parameters, collect the 1H-NMR spectrum of the sample through the nuclear magnetic resonance instrument; judge the authenticity of the bird's nest by comparing the 1H-NMR spectrum of the bird's nest and the sample to be identified. The method is simple and easy to operate, and the weighing of the analysis sample does not need to be very accurate. The pretreatment can be carried out in one batch at the same time. After the bird's nest is hydrolyzed, the mixture is directly detected by nuclear magnetic resonance to obtain the hydrogen nuclear magnetic resonance spectrum; the accuracy is high, the speed is fast, and the sampling time is short; the data Analysis is simple.

Description

technical field [0001] The invention relates to an identification method of bird's nest, in particular to a method for detecting bird's nest by nuclear magnetic resonance. Background technique [0002] As an important means of modern science and technology, nuclear magnetic resonance has determined its position in modern instrument analysis with its powerful structure analysis ability, and is widely used in many fields such as chemistry, medicine, pharmacy, environmental science, biology, and food science. However, NMR has been criticized for its low detection sensitivity compared with other chemical analysis instruments. In recent years, with the increase of magnetic field strength, the emergence of highly sensitive probes, and the improvement of spectrometers and experimental methods, the detection sensitivity of NMR has been greatly improved, and it is no longer a key factor restricting the application of NMR. Malz et al. conducted a systematic investigation and analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
Inventor 徐敦明黄慧英高志亮吴敏周昱
Owner INSPECTION & QUARANTINE TECH CENT OF XIAMEN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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