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Method for determining vegetable oil adulteration types and adulteration amount in sesame oil

A technology of sesame oil and vegetable oil, which is applied in the field of identification, can solve problems such as no quantitative basis, and achieve the effects of green detection efficiency, simple and fast operation, and good application prospects

Inactive Publication Date: 2017-06-27
SHANDONG ANALYSIS & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional test method is mainly based on the content of linolenic acid. It is speculated that the main adulterated vegetable oil is soybean oil, and no detailed quantitative basis is given.

Method used

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  • Method for determining vegetable oil adulteration types and adulteration amount in sesame oil
  • Method for determining vegetable oil adulteration types and adulteration amount in sesame oil
  • Method for determining vegetable oil adulteration types and adulteration amount in sesame oil

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Experimental program
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Embodiment 1

[0031] 1 Materials and methods

[0032] 1.1 Instruments and reagents Instruments: gas chromatograph (with FID detector) (Thermofisher, GC1310), HP-WAX capillary column (30m×0.25mm, 0.25μm film thickness); reagents: sodium chloride, sodium hydroxide (analytical pure), methanol (chromatographically pure), methanol solution of boron trifluoride (12%).

[0033] 1.2 Experimental method

[0034] 1.2.1 Instrument conditions Inlet temperature: 220°C; split ratio: 100:1; GC: initial temperature 100°C (hold for 5min), rise to 240°C at 4°C / min (hold for 5min); carrier gas: N 2 ; Detector temperature: 250° C.; hydrogen flow rate 35 mL / min; air flow rate 350 mL / min; injection volume 0.5 μL.

[0035] 1.2.2 Sample preparation

[0036] Weigh about 0.2g of the sample into a 50mL flat-bottomed flask, blow dry nitrogen for 1-2min, add 5mL of 2% sodium hydroxide methanol solution, reflux in a water bath at 80°C for 10min, add 5mL of 12% boron trifluoride methanol solution, and continue to refl...

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Abstract

The invention discloses a method for determining vegetable oil adulteration types and adulteration amount in sesame oil. The method includes mixing each of soybean oil, peanut oil, maize oil, sunflower seed oil, linseed oil and rapeseed oil with the sesame oil to form a mixed oil sample, determining the content of each of palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid in the mixed oil samples by means of gas chromatography to obtain true values of fatty acids of the mixed oil samples; establishing a regression equation model according to function relations of the oil adulteration types, the oil adulteration content and the determined true values of the fatty acids of the mixed vegetable oil samples, and calling detected fatty acid information of the samples to be detected into an established quantitative analysis model so as to obtain the types and the content of the vegetable oils including the soybean oil, the peanut oil, the maize oil, the sunflower seed oil, the linseed oil and the rapeseed oil. The method for determining the vegetable oil adulteration types and the adulteration amount in the sesame oil has the advantages of high detection speed, high efficiency and suitability for large-batch sample analysis, thereby having a promising application prospect.

Description

technical field [0001] The invention relates to a method for identification, in particular to a method for identifying the type and amount of adulterated vegetable oil in sesame oil. Background technique [0002] Sesame oil, also known as sesame oil and sesame oil, is an edible vegetable oil processed from sesame seeds. It is a semi-dry oil and is a favorite condiment for consumers. Sesame oil has a strong fragrance and is a natural vegetable oil with high nutritional value and does not contain any harmful ingredients. It is widely loved by the public. It mainly contains 35%-45% oleic acid, 35%-50% linoleic acid, stearic acid 3.5% to 6%, palmitic acid 7% to 12%, arachidic acid and a small amount of linolenic acid, etc., and because of the high content of unsaturated fatty acids, regular consumption of sesame oil can improve brain cell vitality, improve blood circulation, and delay aging. At the same time, sesame oil also contains a variety of natural antioxidants (such as s...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/68
CPCG01N30/06G01N30/68
Inventor 陈跃苑金鹏王珊珊王晓利陈相峰张春昳
Owner SHANDONG ANALYSIS & TEST CENT
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