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Method for identifying authenticity of low-erucic-acid rapeseed oil

The invention relates to a technology of canola oil and a detection method, which is applied in the field of oil authenticity detection, can solve problems such as poor growth and weight loss, and achieves good repeatability and stability.

Active Publication Date: 2013-01-30
XIAMEN UNIV
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Problems solved by technology

It was also found that long-term feeding of animals with feed containing high erucic acid resulted in weight loss and poor growth.

Method used

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  • Method for identifying authenticity of low-erucic-acid rapeseed oil
  • Method for identifying authenticity of low-erucic-acid rapeseed oil
  • Method for identifying authenticity of low-erucic-acid rapeseed oil

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Embodiment 1～4

[0027] Take 4 rapeseed oils of different brands, take 300 μL of rapeseed oil for each sample into an NMR tube, add deuterated solvents: deuterated methanol, deuterated chloroform, deuterated benzene, and obtain samples to be tested. The hydrogen spectrum was collected by a high-field NMR spectrometer such as figure 1 and carbon spectra such as figure 2 , after obtaining the spectrum, first compare as figure 1 The characteristic fingerprint peak in the interval of chemical shift 0.5 ~ 1.5m; compare as figure 2 The characteristic fingerprint peak in the range of chemical shift 129.6-130.3ppm.

[0028] Table 1

[0029]

[0030] Use the fingerprint peak to judge whether the oil is normal. At the same time, the original data can be exported, and the R software can be used to calculate the specific composition and saturation of fatty acids. The results are shown in Table 1.

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Abstract

The invention discloses a method for identifying the authenticity of low-erucic-acid rapeseed oil and relates to a method for identifying the authenticity of oil. The method comprises the following steps of: measuring a liquid oil sample to be detected; dissolving the liquid oil sample to be detected by using a deuterated solvent and then transferring the mixture into a nuclear magnetic resonance (NMR) tube, and acquiring hydrogen spectrum data and carbon spectrum data of the sample through a high-field NMR spectrometer; and performing data analysis, judging the erucic acid content by calculating fingerprint peak information of a carbon spectrum, and judging that the erucic acid content is high according to fingerprint peak information of a hydrogen spectrum. Based on the NMR fingerprint spectrum technology, the fatty acid content in the rapeseed oil is measured through NMR, and the distribution condition of the measured fatty acid content can be analyzed. An NMR spectrum also can reflect the molecular structure characteristics, so that all fatty acid compositions in the experimental sample can be identified accurately, and every fatty acid composition can be identified quickly and non-destructively. By the method, the oil quality can be quickly identified according to NMR data, the compositions of the sample are not destroyed, sample pretreatment is not required, and a complex sample preparation process is avoided.

Description

technical field [0001] The invention relates to a method for detecting the authenticity of oils and fats, in particular to a method for detecting the authenticity of canola oil. Background technique [0002] Low erucic acid rapeseed oil, in my country's national standard, refers to rapeseed oil with an erucic acid content of less than 3%. The existing high-quality rapeseed oil is processed from double-low rapeseed through modern technology. It is a pure natural, pollution-free and healthy edible oil with high grade and high nutritional value. It has the reputation of "Oriental olive oil". It has a mellow smell and is rich in nutrients. Its beneficial oleic acid and linoleic acid content ranks first among all kinds of vegetable oils. It can protect the health of patients with cardiovascular and cerebrovascular diseases and protect the blood vessels of middle-aged and elderly people. The nutritional value is very high, rich in a variety of essential nutrients for the human bo...

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
Owner XIAMEN UNIV
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