Method for identifying olive oil

A technology for olive oil and liquid oil, which is applied in the direction of analysis by using nuclear magnetic resonance, can solve the problems of not being widely used, complicated pretreatment, time-consuming, etc., and achieves the effects of high repeatability, good repeatability and simple operation.

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

However, these methods are often not widely used due to time-consuming, complicated pre-processing and other reasons.

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  • Method for identifying olive oil
  • Method for identifying olive oil
  • Method for identifying olive oil

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Embodiment Construction

[0040] The present invention adopts high-field nuclear magnetic resonance spectroscopy to collect the hydrogen spectrum and carbon spectrum of the sample, and then combines the spectrum fingerprint peak to determine the authenticity of the sample, and can calculate the fatty acid composition of the sample intermediate to further confirm the olive oil composition. Specific steps are as follows:

[0041] 1. Sample source: The olive oil samples are commercially available olive oil samples of different brands, including 34 olive oils and olive blended oils. The details of the samples are shown in Table 1.

[0042] Table 1

[0043] brand

brand

brand

Olive Oil Bulk - 2

Yikang Pure Olive Oil

Weiyi olive sunflower blend

STIA Premium

Rohua Mediterranean Extra

Taishan olive sunflower oil

Mumus olive oil

Kalamada Premium

Yikang Olive Grape Blend

Calasvagno Extra

olive oil (in bulk)

EVPR (Greece)

Green...

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Abstract

The invention discloses a method for identifying olive oil and relates to identification of vegetable oil. The method comprises the following steps of: filling a liquid oil sample to be detected into a nuclear magnetic tube; adding a deuterated solvent into the nuclear magnetic tube to dissolve the sample, and mixing uniformly for later detection; acquiring data of 1H hydrogen spectrum and 13C carbon spectrum of the sample through a high-field nuclear magnetic resonance spectrometer; and performing data analysis through chemical shift information and peak area information of a nuclear magnetic spectrogram, calculating the relative contents of components of each main fatty acid in the sample, and obtaining an identification result through comprehensive judgment according to multiple indexes. The magnetic resonance identification 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 influence by skills and judgment of operators; and the method is suitable for quick authenticity detection of the olive oil.

Description

technical field [0001] The invention relates to identification of vegetable oil, in particular to an identification method of olive oil based on nuclear magnetic resonance spectrometer NMR. Background technique [0002] Olive oil has a history of thousands of years in the countries along the Mediterranean Sea, and is known in the West as "liquid gold", "queen of natural oils", "Mediterranean nectar" and so on. Olive oil contains more than 80% unsaturated fatty acids, of which the monounsaturated fatty acid oleic acid content exceeds 70%. Eating oils rich in monounsaturated fatty acids is good for controlling blood lipids. It can raise the "good cholesterol" (HDL) in the blood and lower the "bad cholesterol" (LDL) in the blood. With the improvement of people's living standards, olive oil, known as "liquid gold" under the banner of health care, is still favored by ordinary people, although the price is more than 10 times more expensive than ordinary cooking oil. [0003] Ol...

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Application Information

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IPC IPC(8): G01N24/08
Inventor 黄慧英蔡剑怀
Owner XIAMEN UNIV
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