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Method for determining palm oil mixed in special-grade virgin olive oil

A technology of virgin olive oil and a determination method, which is applied in the directions of measuring devices, instruments, scientific instruments, etc., to achieve the effects of reliable determination results, simple operation and high detection efficiency

Inactive Publication Date: 2016-12-14
ZHANGJIAGANG EENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the detection of palm oil in olive oil is still a blank in my country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Determination of the content of δ-tocotrienol in No. 1 sample. First weigh 500mg (accurate to 1mg) of sample No. 1, which is uniformly mixed, into a 25mL brown volumetric flask, then add n-heptane into the volumetric flask to completely dissolve the extra virgin olive oil sample, continue to add n-heptane to dilute to volume bottle scale to obtain No. 1 extra virgin olive oil sample solution. After mixing the No. 1 extra virgin olive oil sample solution, it was determined by normal phase liquid chromatography. The equipment and chromatographic conditions include: liquid chromatograph, the chromatographic column adopts a diol-based silica gel column, and the column temperature is 25 ° C. The mobile phase is a tetrahydrofuran n-heptane solution with a volume concentration of 3.85%, the flow rate is 1.0mL / min, and the fluorescence detector is used for measurement. The excitation wavelength is 295nm and the emission wavelength is 330nm. The content of δ-tocot...

Embodiment 2

[0016] Embodiment 2: Determination of the content of δ-tocotrienol in No. 2 sample. Accurately weigh 500mg (accurate to 1 mg) of sample No. 2, which is uniformly mixed, into a 25mL brown volumetric flask, then add n-heptane into the volumetric flask to completely dissolve the extra virgin olive oil sample, and continue to add n-heptane to dilute To the scale of the volumetric flask, obtain No. 2 extra virgin olive oil sample solution. After mixing the No. 2 extra virgin olive oil sample solution, it was determined by normal phase liquid chromatography. The equipment and chromatographic conditions include: liquid chromatography, a chromatographic column using a diol-based silica gel column, and a column temperature of 25°C. The mobile phase is a tetrahydrofuran n-heptane solution with a volume concentration of 3.85%, the flow rate is 1.0mL / min, and the fluorescence detector is used for measurement. The excitation wavelength is 295nm and the emission wavelength is 330nm. The co...

Embodiment 3

[0019] Embodiment 3: Determination of the content of δ-tocotrienol in No. 3 sample. Accurately weigh 500 mg of sample No. 3, which is uniformly mixed, into a 25 mL brown volumetric flask, then add n-heptane into the volumetric flask to completely dissolve the extra virgin olive oil sample, continue to add n-heptane to dilute to the scale of the volumetric flask to obtain three No. extra virgin olive oil sample solution. After mixing the No. 3 extra virgin olive oil sample solution, it was determined by normal phase liquid chromatography. The equipment and chromatographic conditions include: using liquid chromatography, the chromatographic column adopts a diol-based silica gel column, and the column temperature is 25 ° C. The mobile phase is a tetrahydrofuran n-heptane solution with a volume concentration of 3.85%, the flow rate is 1.0mL / min, and the fluorescence detector is used for measurement. The excitation wavelength is 295nm and the emission wavelength is 330nm. The cont...

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Abstract

The invention discloses a method for determining palm oil mixed in special-grade virgin olive oil. The method comprises the following steps that firstly, the content of delta-tocotrienol in a special-grade virgin olive oil sample is measured; secondly, the mass fraction of campesterol in the total content of sterol in the special-grade virgin olive oil sample is measured; thirdly, when the content, obtained in the first step, of delta-tocotrienol is larger than or equal to 2 mg / kg, and the mass fraction, obtained in the second step, of campesterol in the total content of sterol is smaller than or equal to 0.5%, it is determined that palm oil is mixed in the special-grade virgin olive oil. The method for determining palm oil mixed in the special-grade virgin olive oil is easy to implement, good in accuracy, reliable in determining result, and high in detection efficiency, and most importantly fills up the national detection blank of palm oil mixed in olive oil, and a powerful guarantee for maintaining the benefits of mass consumers in China is provided.

Description

technical field [0001] The invention relates to the technical field of olive oil detection, in particular to the detection of extra virgin olive oil. Background technique [0002] The definition of olive oil in the national standard "GB23347-2009 Olive Oil, Olive Pomace Oil": the oil obtained from the fruit of the olive tree, except for the oil obtained by solvent extraction or heavy esterification, must not be mixed with other types of fats. However, driven by huge profits, there are always unscrupulous traders who mix other types of vegetable oils into olive oil. Because palm oil is cheap, colorless, and has no special smell, it is often adulterated into olive oil by unscrupulous traders. This has seriously damaged the economic interests of consumers in my country, and long-term consumption of olive oil mixed with palm oil will also endanger the health of consumers to a certain extent. At present, my country's detection of palm oil in olive oil is still a blank. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/68G01N30/74
CPCG01N30/02G01N30/68G01N30/74
Inventor 顾强乙小娟邵景东石晶王玥申进玲张慧刘一军
Owner ZHANGJIAGANG EENTRY EXIT INSPECTION & QUARANTINE BUREAU
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