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Rapid aroma fingerprint identification method for geographical indication protection product of vinegar

A technology of geographical indication and identification method, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of lack of systematic research, limited preliminary qualitative analysis, and poor practicability, and achieves strong practicability, rapid identification and analysis. short time effect

Inactive Publication Date: 2012-06-20
SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing research lacks a systematic study on the relationship between the aroma components of vinegar and products protected by geographical indications, and is often limited to preliminary qualitative analysis of the characteristic aroma components of products protected by geographical indications of vinegar, and cannot effectively use aroma components to determine the authenticity of products protected by geographical indications of vinegar The identification is not practical

Method used

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  • Rapid aroma fingerprint identification method for geographical indication protection product of vinegar
  • Rapid aroma fingerprint identification method for geographical indication protection product of vinegar
  • Rapid aroma fingerprint identification method for geographical indication protection product of vinegar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Enrichment and detection of aroma components in vinegar.

[0028] The samples used in the present invention have selected relatively representative geographical indication protected vinegars and non-geographical indication protected vinegars, a total of 50 samples, including 13 samples of Zhenjiang fragrant vinegar, 9 samples of Zhenjiang mature vinegar, 13 samples of Shanxi mature vinegar, and 13 samples of non- geographical indication protected vinegar. There are 15 samples of geographical indication vinegar, and the samples basically cover all brands of the collected samples.

[0029]Pipette 5.0 mL of vinegar sample into a 20 mL headspace vial, then add 0.8 g of sodium chloride, and process each sample three times in parallel. A 75 μm CAR / PDMS coated extraction head was used for headspace extraction, the extraction time was 45 min, the desorption temperature was 240 °C, and the desorption time was 3 min. The collected aroma components were detected by gas ...

Embodiment 2

[0032] Example 2 Aroma fingerprint analysis of Zhenjiang fragrant (old) vinegar.

[0033] The data processing adopts the self-edited software based on Matlab6.5 to perform PCA analysis, similarity calculation, and obtain the common patterns of fingerprints, etc. In the original spectrum, the peak of benzoic acid with a retention time of 33.95-34.20 min is a food additive. This peak was removed from all the spectra and processed, and the spectrum obtained by GC / MS was exported and converted into " m ×2" matrix, the first column of the matrix is ​​the data acquisition time of the MS detector, and the second column is the response signal of the MS detector; after all the signals of the sample spectra are converted, the final form is " m x n "Matrix(" n " represents the number of samples), and the matrix is ​​analyzed by PCA. In the fingerprints of all samples of Zhenjiang vinegar, Zhenjiang mature vinegar, and non-geographical indication protected vinegar, this peak is removed ...

Embodiment 3

[0036] Example 3 Analysis of Aroma Fingerprint of Shanxi Mature Vinegar.

[0037] The data processing adopts the self-edited software based on Matlab6.5 to perform PCA analysis, similarity calculation, and obtain the common patterns of fingerprints, etc. On the original spectrum, the peak of benzoic acid with a retention time of 33.95-34.20 min was a food additive. This peak was removed from the fingerprints of all samples of Shanxi mature vinegar and non-geographical indication protected vinegar for processing, and the common values ​​of the two types of samples were obtained. Pattern aroma fingerprints such as Figure 5 As shown, the main difference between the aroma fingerprints of the two types of samples is concentrated in the region of retention time 20-40 min. Figure 5 Middle, A: Aroma fingerprint of Shanxi mature vinegar; B: Aroma fingerprint of non-geographical indication protected vinegar; 1: Acetic acid; 2: 3-hydroxy-2-butanone; 3: Furfural; 4: Benzaldehyde; 5: 5-...

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Abstract

The invention provides a rapid aroma fingerprint identification method for a geographical indication protection product of vinegar. The method comprises the following steps of: A) enriching and detecting aroma components in the vinegar; B) constructing a shared model aroma fingerprint; C) screening principal aroma components through principal component analysis (PCA); D) establishing an aroma fingerprint model of the geographical indication protection product of the vinegar; and E) rapidly identifying an unknown vinegar sample. The rapid aroma fingerprint identification method for the geographical indication protection product of the vinegar can be widely applied to screening of doubtable fake geographical indication protection products of the vinegar, has short analysis time, is high in sensitivity, accuracy and practicality and has significance of identifying and protecting the geographical indication protection products of the vinegar, and the problem that authenticity identification of the geographical indication protection product of the vinegar in the market is difficult and consumes long time is solved.

Description

technical field [0001] The invention relates to an identification method for products protected by geographical indications of vinegar, in particular to a method for quickly identifying aroma fingerprints of products protected by geographical indications of vinegar. Background technique [0002] Vinegar is a kind of nutritious acid condiment that Chinese people like very much. It has a brewing history of 5,000 years in my country. The annual output of vinegar in my country exceeds 26 million kilograms, and the daily consumption is 3.2 million kilograms. Among them, Shanxi Old Mature Vinegar and Zhenjiang Fragrant (Old) Vinegar rank among the top four famous vinegars in China, and have applied for the protection of geographical indication products. They represent profound history and culture, are deeply loved by people, and have a large market demand. [0003] Aroma is an important indicator to reflect the quality of vinegar. The key sensory quality of Shanxi mature vinegar ...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 郑彦婕李碧芳罗美中阮贵华陈素娟孟海鸥李苑雯曾泳艇张协光黎永乐李丹妮
Owner SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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