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Method for detecting doping of camellia oil

A camellia oil, detection reagent technology, applied in the measurement of color/spectral properties, material analysis by observing the effect on chemical indicators, and analysis by chemical reaction of materials, etc., can solve food safety, oil doping analysis. Inspection difficulties, economic losses and other problems, to achieve the effect of simple operation

Active Publication Date: 2021-12-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the various types of adulteration, it is difficult to analyze and test oil adulteration, but because of the economic loss and food safety problems caused by the existence of adulterated oil, law enforcement units and consumers have to face this problem

Method used

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  • Method for detecting doping of camellia oil
  • Method for detecting doping of camellia oil
  • Method for detecting doping of camellia oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Experimental materials: first-grade camellia oil, purchased from Hunan Nongqinong Science and Technology Development Co., Ltd.; first-grade rapeseed oil, commercial rapeseed oil.

[0060] A method for detecting camellia oil doping, comprising the following steps:

[0061] Step 1. Preparation of detection reagent: Dissolve vanillin with a purity of 98% in ethanol, and configure it into a 1.0ml ethanol solution of vanillin with a mass fraction of 25%; add 1.0ml of mass concentration to the ethanol solution of vanillin 35% concentrated hydrochloric acid, mix well and set aside;

[0062] Step 2. Curve drawing:

[0063] Oil sample preparation: add water, 0% camellia oil, 5% camellia, 10% camellia, 20% camellia in a 25ml stoppered colorimetric tube oil, 4ml of camellia oil with a doping ratio of 30%, and the doped oil is rapeseed oil.

[0064] For the results of the color reaction, see figure 1 . It can be seen that from left to right, the colors are obviously deepened i...

Embodiment 2

[0067] Experimental materials: first-grade camellia oil, purchased from Hunan Nongqinong Science and Technology Development Co., Ltd.; first-grade rapeseed oil, commercial rapeseed oil.

[0068] A method for detecting camellia oil doping, comprising the following steps:

[0069] Step 1, the preparation of detection reagent: the vanillin of purity 98% is dissolved in ethanol, is configured into the ethanol solution of the vanillin of the 25% mass fraction of volume being 0.25ml, 0.5ml, 2ml, 3ml; In the ethanol of vanillin Add 1.0ml of concentrated hydrochloric acid with a mass concentration of 35% to the solution, mix well and set aside, and mark them as 0.25-detection reagent, 0.5-detection reagent, 2.0-detection reagent and 3.0-detection reagent;

[0070] Step 2. Curve drawing:

[0071] Oil sample preparation: add water, 0% camellia oil, 5% camellia, 10% camellia, 20% camellia in a 25ml stoppered colorimetric tube oil, 4ml of camellia oil with a doping ratio of 30%, and the...

Embodiment 3

[0080] Experimental materials: first-grade camellia oil, purchased from Hunan Nongqinong Science and Technology Development Co., Ltd.; first-grade rapeseed oil, commercial rapeseed oil.

[0081] A method for detecting camellia oil doping, comprising the following steps:

[0082] Step 1, preparation of detection reagent: dissolve vanillin with a purity of 98% in ethanol, and configure it into ethanol solutions of 5%, 10%, 15%, and 20% mass fraction of vanillin with a volume of 1ml respectively; Add 1.0ml of concentrated hydrochloric acid with a mass concentration of 35% to the ethanol solution, mix well and set aside, and mark them as 5%-detection reagent, 10%-detection reagent, 15%-detection reagent, and 20%-detection reagent;

[0083] Step 2. Curve drawing:

[0084] Oil sample preparation: add water, 0% camellia oil, 5% camellia, 10% camellia, 20% camellia in a 25ml stoppered colorimetric tube oil, 4ml of camellia oil with a doping ratio of 30%, and the doped oil is rapesee...

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Abstract

The invention relates to the technical field of food detection, in particular to a method for detecting doping of camellia oil. The method for detecting doping of camellia oil comprises the following steps: step 1, preparation of a detection reagent: adding a certain amount of concentrated hydrochloric acid into an ethanol solution of vanillin, and uniformly mixing for later use; step 2, drawing a curve: adding the detection reagent into the oil samples with different doping proportions, uniformly oscillating, measuring a light absorption value after 30-90 minutes, and drawing the curve according to the doping proportions and the light absorption value; and step 3, detection: adding the detection reagent into the oil sample to be detected, uniformly oscillating, measuring a light absorption value after 30-90 minutes, and judging the doping degree according to the curve. The method has specific absorption under an ultraviolet spectrophotometer, and the doping concentration can be quantitatively determined.

Description

technical field [0001] The invention relates to the technical field of food detection, in particular to a method for detecting camellia oil doping. Background technique [0002] Camellia oil is a unique woody oil tree species in southern my country and one of the four largest woody edible oil tree species in the world. It is naturally distributed in 15 provinces and regions in southern China, and the existing planting area is about 60 million mu. Camellia oil is an important woody edible oil in my country, and it is also one of the edible oils with high nutritional value. Because of its high price, adulteration is more common. Unscrupulous traders often mix low-priced oils with low nutritional value and poor quality, such as blended oil and palm oil, in camellia oil to make huge profits. Researchers at home and abroad have carried out related research very early, such as commonly used methods such as chromatography and Pope analysis. However, the above methods are cumberso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/78
CPCG01N21/31G01N21/78Y02A50/30
Inventor 陶能国杨冰江小冰朱晨谭元珍
Owner XIANGTAN UNIV
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