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Method for detecting authenticity of peanut oil

A detection method and technology for peanut oil, which are applied in the direction of analysis by using nuclear magnetic resonance, can solve problems such as flooding of peanut oil, and achieve the effects of good stability, simple operation and high repeatability.

Inactive Publication Date: 2013-01-30
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through investigations by reporters, it was found that fake and shoddy peanut oil is still flooding the market in rural and remote areas

Method used

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  • Method for detecting authenticity of peanut oil
  • Method for detecting authenticity of peanut oil
  • Method for detecting authenticity of peanut oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0038] Measure 300 μL of peanut oil into an NMR tube, add a deuterated solvent to obtain the sample to be tested. Acquisition with a high-field NMR spectrometer 1 H spectrum such as figure 1 with 13 C carbon spectrum such as figure 2 , after obtaining the spectrum, first compare as figure 1 exist 1 The characteristic fingerprint peak in the interval of H hydrogen spectrum chemical shift 0.0~6.0ppm; compare as figure 2 exist 13 The characteristic fingerprint peak in the range of chemical shift 0.0-190.0ppm in C spectrum.

[0039] Table 1

[0040]

[0041] At the same time, the original data were exported, and the R software was used for calculation to obtain the specific composition and saturation, relative acidity and relative oxidation of fatty acids. The results are shown in Table 1.

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Abstract

The invention discloses a method for detecting authenticity of peanut oil, and relates to a method for detecting vegetable oil. The method comprises the following steps of: measuring a liquid oil sample to be detected; dissolving the sample by using a deuterated solvent, and transferring the solution to a nuclear magnetic tube for later detection; acquiring data of 1H hydrogen spectrum and 13C carbon spectrum of the sample through a nuclear magnetic resonance spectrometer; and analyzing the data, namely carrying out integral analysis on the data through nuclear magnetic spectrogram fingerprint peak comparison analysis of the peanut oil by virtue of R software, calculating the relative content of components of each main fatty acid in the sample to obtain the proportion of oxidative products and free fatty acids when the content of the total fatty acid is 100 percent, and obtaining an identification result according to multiple indexes. The method is easy to operate, accurate in measurement and high in repeatability; through nondestructive detection of the sample, the same sample can be used for repeated measurement or other analysis and test, and the measurement result is not influenced by skills and judgment of operators; and the method is suitable for quick detection of the peanut oil.

Description

technical field [0001] The invention relates to a method for detecting vegetable oil, in particular to a method for identifying the authenticity of peanut oil. Background technique [0002] Peanut oil is the third largest edible oil in my country. Its usage is second only to rapeseed oil and soybean oil. Peanut oil is known for its rich nutrition and is one of the most expensive edible oils in the market. Peanut oil can decompose cholesterol in the human body into bile acid and excrete it, thereby reducing the content of cholesterol in blood plasma. In addition, in peanut oil, also contain the materials useful to human body such as wheat germ phenol, phosphatide, vitamin E, choline. Often edible peanut oil, can prevent that wrinkled skin is aging, and protection vascular wall, prevents thrombosis, contributes to prevention of arteriosclerosis and coronary heart disease. Choline in peanut oil also can improve the memory of human brain, delays brain function decline. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
Inventor 黄慧英黄培强蔡剑怀
Owner XIAMEN UNIV
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