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Method for identifying content of fennel mixed by fennel produced in Gansu and fennel produced in Szechuan

An identification method and technology of cumin, applied in the field of food adulteration content analysis, can solve the problems of inability to determine the amount of adulteration, large differences in the price of cumin, and different quantification.

Inactive Publication Date: 2017-07-28
XUCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the price of cumin in Sichuan and Gansu is quite different. The identification of cumin adulteration reported in the literature of cumin can only be qualitative, that is, through analysis, it can be determined whether there is adulteration, but it is not quantitative.

Method used

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  • Method for identifying content of fennel mixed by fennel produced in Gansu and fennel produced in Szechuan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1 some Gansu and Sichuan cumin.

[0021] 2. Gansu cumin is mixed in proportions of 0.2, 0.4, 0.6, 0.7 and 0.8 respectively.

[0022] 3 Weigh 1g of cumin mixed in different proportions, break it up, put it into a 15mL headspace bottle, and add 5mL of distilled water.

[0023] 4 In a water bath at 60°C, equilibrate the headspace bottle for 30 minutes, and use an ACAR / PDMS / DVB solid-phase extraction column for adsorption for 30 minutes.

[0024] 5 Desorb at 250°C for 3 minutes.

[0025] 7. The heating program is the initial temperature of 50°C, rising to 90°C at 4°C / min, rising to 140°C at 5°C / min, rising to 180°C at 4°C / min, and maintaining for 10 minutes.

[0026] Mass spectrometry conditions: EI ion source, ion source temperature 230°C, quadrupole temperature 150°C, interface temperature 250°C, electron energy 70eV, solvent delay 6.5min, scan mode scan, mass range 29-700amu.

[0027] 8 With Estragole (p-allyl anisole) as the characteristic substance, the total ion ch...

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Abstract

The invention discloses a method for identifying the content of fennel mixed by fennel produced in Gansu and fennel produced in Szechuan and aims to solve the problem that the fennel is similar in appearance but large in price difference, and some illegal small retailers mix the fennel produced in different places with different proportions so as to use bad fennel to pretend good fennel. Currently, the price of the fennel produced in Szechuan and the price of the fennel produced in Gansu are large in difference, fennel adulteration identification reported in fennel literature can only achieve qualitative analysis, that is to say, whether adulteration exists or not can be determined through the analysis while the mixing proportion cannot be determined. The method is characterized in that HS-SPME-GC / MS (headspace-solid phase microextraction-gas chromatography / mass spectrum) analysis is used to use p-allylanisole and 3-methoxybenzaldehyde as the feature markers to quantitatively the proportion of the fennel produced in Gansu and the proportion of the fennel produced in Szechuan after mixing. The method has the advantages that standard substances are not needed, and the method is simple to operate, low in detection cost, wide in application range, and the like.

Description

technical field [0001] The invention relates to the field of food adulteration content analysis, in particular to a method for identifying the content of mixed fennel from two production areas in Gansu and Sichuan. Background technique [0002] Cumin has the functions of dispelling cold, relieving pain, regulating qi and harmonizing stomach. For cold colic abdominal pain, testicular deviation, dysmenorrhea, cold pain in the lower abdomen, abdominal distension and pain, lack of appetite, vomiting and diarrhea, testicular hydrocele. Cumin can be fried, eaten cold, made into steamed buns and dumplings. It has a unique taste and is deeply loved by Chinese people. It is a must-have condiment for home use. Therefore, cumin has a wide planting area and a large output, but cumin from different origins has similar shapes. Prices vary widely. Some unscrupulous traders mix cumin from different origins in different proportions to fill up the good with the bad. At present, the price o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 魏泉增王德国胡旭阳
Owner XUCHANG UNIV
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