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A rapid identification method of counterfeit sesame oil added with sesame oil essence

A technology of sesame oil and essence is applied in the direction of measuring device, material analysis, instruments and the like by electromagnetic means, can solve problems such as inability to effectively identify the authenticity of sesame oil, unsuitable for on-site detection of sesame oil, unfavorable promotion and popularization, etc., and achieves low detection cost, Short sample detection time and environmentally friendly results

Active Publication Date: 2017-05-31
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above methods have the characteristics of complex sample pretreatment, long detection cycle, and high detection cost, which are not conducive to popularization, and are not suitable for on-site detection of sesame oil quality and safety supervision.
In addition, the current national standard GB8233-2008 stipulates the physical and chemical testing indicators of sesame oil, including acid value, peroxide value, iodine value, color and other indicators, and these indicators alone cannot effectively identify the authenticity of sesame oil

Method used

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  • A rapid identification method of counterfeit sesame oil added with sesame oil essence
  • A rapid identification method of counterfeit sesame oil added with sesame oil essence
  • A rapid identification method of counterfeit sesame oil added with sesame oil essence

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Experimental program
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Effect test

Embodiment 1

[0039] Ion mobility spectrometry signal collection: sample preparation; 31 samples of pure sesame oil; sample group of counterfeit sesame oil mixed with sesame oil essence: select a sesame oil essence and add it to the same large In soybean oil and cottonseed oil, a total of 10 samples; respectively accurately measure 50 μL of pure sesame oil, soybean oil adulterated with sesame oil flavor, and cottonseed oil sample adulterated with sesame oil flavor, and place them in stoppered test tubes, dilute 100 times with n-hexane solvent, Vortex for 30s to mix the sample, inject the sample into the sample for detection, collect the information of the ion mobility spectrometer, and set the working parameters of the ion mobility spectrometer to ionization source: pulsed glow discharge ion source: pulsed glow discharge ion source; drift Zone voltage 300 V / cm; Migration gas flow: 700 mL / min; Carrier gas flow: 300 mL / min; Inlet temperature: 170°C; Migration tube temperature: 60.0°C; Injectio...

Embodiment 2

[0044] Ion mobility spectrometry signal acquisition; sample preparation; 31 pure sesame oil samples; counterfeit sesame oil sample group mixed with sesame oil essence: five different brands of sesame oil essence were selected and added to the same soybean oil and cottonseed oil at a ratio of 5%, totaling 10 50 μL of pure sesame oil, soybean oil adulterated with sesame oil flavor, and cottonseed oil sample adulterated with sesame oil flavor were accurately measured respectively in a stoppered test tube, diluted 80 times with n-hexane solvent, vortexed for 40 s to mix the samples, and carried out The sample is put into the ion mobility spectrometer for detection, and the information of the sample ion mobility spectrometer is collected. The working parameters of the ion mobility spectrometer are set as ionization source: pulsed glow discharge ion source: pulsed glow discharge ion source: drift zone voltage 300 V / cm; Migration gas flow: 700 mL / min; Carrier gas flow: 300 mL / min; In...

Embodiment 3

[0052] Ion mobility spectrometry signal acquisition; sample preparation; 31 pure sesame oil samples; counterfeit sesame oil sample group mixed with sesame oil essence: select a sesame oil essence and add it to five different brands of soybean oil and cottonseed oil at a ratio of 5%, totaling 10 each sample; accurately measure 50 μL each of pure sesame oil, soybean oil with sesame oil flavor adulteration, and cottonseed oil sample with sesame oil flavor adulteration in a stoppered test tube, dilute 120 times with n-hexane solvent, vortex 30s to mix the samples, and carry out The sample was put into the ion mobility spectrometer for detection, and the information of the sample ion mobility spectrometer was collected. The working parameters of the ion mobility spectrometer were set as ionization source: pulsed glow discharge ion source; pulsed glow discharge ion source; drift zone voltage 300 V / cm; Migration gas flow: 700 mL / min; Carrier gas flow: 300 mL / min; Inlet temperature: 1...

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Abstract

The invention relates to a method for rapidly identifying counterfeit sesame oil with sesame oil essence. The method is characterized by comprising the following steps: (1) establishing a model: A. collecting an ion mobility spectrum signal; B. establishing an ion mobility spectrum database of a pure sesame oil sample and an ion mobility spectrum database of a counterfeit sesame sample with the sesame oil essence; C. establishing a classification model of the pure sesame oil and the counterfeit sesame oil with the sesame oil essence; (2) utilizing the model: perform the spectra acquisition for a to-be-detected sample according to the ion mobility spectrum signal collection method in A of the step (1), preprocessing the acquired ion mobility spectrum by utilizing the method in B of the step (1) to obtain ion mobility spectrum data of the sample, judging whether the sample is the pure sesame oil or the counterfeit sesame oil with the sesame oil essence on the basis of the ion mobility spectrum data of the to-be-detected sample by utilizing the classification model of the pure sesame oil and the counterfeit sesame oil with the sesame oil essence established in C of the step (1). The method is simple to operate, high in speed and capable of effectively and accurately identifying the counterfeit sesame oil sample with the sesame oil essence.

Description

technical field [0001] The invention relates to a method for quickly identifying counterfeit sesame oil added with sesame oil essence, belonging to the field of edible oil quality and safety. Background technique [0002] Sesame is one of the oldest oil varieties in my country. Sesame oil prepared from sesame seeds is a kind of edible oil with strong fragrance and rich nutrition. Sesame oil contains a lot of unsaturated fatty acids, especially linoleic acid; it also contains a variety of natural antioxidants, such as tocopherol, sesamol, sesamin and other lignin substances. These substances have the functions of protecting cardiovascular, lowering cholesterol, and delaying aging. [0003] GB 8233-2008 stipulates that the acid value, peroxide value, color and other quality indicators of sesame oil must meet the relevant national standards for vegetable oil inspection; sesame oil must not be mixed with other edible oils and non-edible oils, and no flavors and fragrances shou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/68
Inventor 张良晓李培武帅茜王秀嫔张奇张文
Owner INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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