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Method for determining volatile components of linseed oil and application thereof

A technology for volatile components and determination methods, which is applied in the field of determination of volatile components of linseed oil, can solve the problems of difficult linseed oil detection and identification, single component, less volatile components, etc. Wide range of properties and high extraction efficiency

Pending Publication Date: 2021-03-30
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, most of the adulteration identification of volatile components is based on the method of gas phase fingerprinting, but the detected components are relatively single, and there are few volatile components identified, so it is difficult to comprehensively and accurately identify the volatile components of linseed oil. Therefore, it is urgent to establish a detection method that can more comprehensively identify the volatile components of linseed oil

Method used

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  • Method for determining volatile components of linseed oil and application thereof
  • Method for determining volatile components of linseed oil and application thereof
  • Method for determining volatile components of linseed oil and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The mensuration of embodiment 1 linseed oil volatile components

[0061] 1 Materials and methods

[0062] 1.1 Materials and reagents

[0063] 40 kinds of linseed oil from Qinghai, numbered S1-S40 (Table 1), were obtained by Soxhlet extraction in the laboratory (solid-liquid ratio 0.06g / mL, extraction temperature 70°C, extraction time 8h).

[0064] Table 1 Flaxseed Oil Information Sheet

[0065]

[0066] 1.2 Instruments and equipment

[0067] QP 2020 NX GC-MS instrument: Shimadzu Corporation, Japan; 50 / 30μm divinylbenzene / carbon molecular sieve / polydimethylsiloxane (DVB / CAR / PDMS) extraction fiber head, solid phase microextraction handle, Special magnetic heating and stirring device for SPME, 15mL sampling bottle: Supelco of the United States; JA1003 electronic balance: Shanghai Liangping Instrument Co., Ltd.

[0068] 1.3 Test conditions

[0069] 1.3.1 Extraction of volatile components

[0070] SPME extraction method:

[0071] Place the 50 / 30μm DVB / CAR / PDMS extrac...

Embodiment 2

[0107] Example 2 Construction of fingerprints of volatile components of linseed oil from Qinghai

[0108] 1. Using the "Similarity Evaluation System of Chromatographic Fingerprints of Traditional Chinese Medicine" to analyze the chromatograms of volatile components of 40 kinds of linseed oils in Qinghai, and obtain the superimposed fingerprints of S1-S40 ( Figure 8 ).

[0109] From Figure 8 It can be seen that the fingerprints have the following characteristics: (1) 1-10min peak area, with fewer peaks and relatively low content; (2) 11-26.5min peak area, the chromatographic peaks in this interval are denser than other times, and Aldehydes and hydrocarbons are the main substances, including trans, trans-2,4-heptadienal with the highest content, which is the main fingerprint area of ​​volatile components in Qinghai flaxseed oil; (3) 27-35min peak area, peak Less, relatively low content, including a small amount of acid compounds.

[0110] By analyzing and comparing the total ...

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Abstract

The invention discloses a method for determining volatile components of linseed oil and application thereof, and the determination method comprises the following steps: enriching the volatile components by headspace solid-phase microextraction, and carrying out qualitative or / and quantitative detection while carrying out gas chromatography-mass spectrometry; wherein the headspace solid-phase microextraction conditions are as follows: the fixed extraction temperature is 50-90 DEG C, the balance time is 10-50 minutes, the adsorption time is 20-60 minutes, the desorption time is 1-9 minutes, andthe stirring intensity is 200-600r / min; wherein the heating procedure of the gas chromatography comprises the following steps: keeping for 2-5 minutes at 36-40 DEG C, heating to 100-220 DEG C at a speed of 3-5 DEG C / min, keeping for 5-10 minutes, heating to 180-220 DEG C at a speed of 0-8 DEG C / min, and keeping for 0-10 minutes. The fingerprint spectrum established by the method can effectively detect the adulteration proportion of 10% of peanut oil, sunflower seed oil, sesame oil, more than 20% of corn oil, more than 30% of rapeseed oil and more than 40% of soybean oil, and provides a new andmore comprehensive reference basis for adulteration identification and quality control of linseed oil.

Description

technical field [0001] The invention relates to the technical field of food testing, in particular to a method for measuring volatile components of linseed oil and its application. Background technique [0002] Flax, also known as flax, is one of the world's top ten oil crops, ranking seventh in the world's total oil production. The total content of unsaturated fatty acids in linseed oil is as high as 90%, and it also contains various functional components such as protein, dietary fiber, and phenolic substances, which have a positive effect on disease prevention. It is reported that flaxseed has various health functions, such as anti-inflammatory effect, prevention of cardiovascular disease and cancer, reduction of bone resorption rate, anti-depression, etc. In recent decades, flaxseed oil has become increasingly popular in the global market. Compared with common edible vegetable oils on the market such as soybean oil, peanut oil, corn oil, etc., the price of linseed oil i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/08G01N30/88G01N30/86
CPCG01N30/08G01N30/8686G01N30/88
Inventor 王进英韩玉泽王兴瑞李应霞王淑珍
Owner QINGHAI UNIVERSITY