Gas-chromatography fingerprinting for rapidly identifying edible oil

A gas chromatography, edible oil technology, applied in the field of gas chromatography analysis

Inactive Publication Date: 2009-04-01
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chromatographic fingerprinting method has been widely used and recognized in the quality control and authenticity identification of traditional Chinese medicine products, but it has not been reported in the quality control of edible oil

Method used

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  • Gas-chromatography fingerprinting for rapidly identifying edible oil
  • Gas-chromatography fingerprinting for rapidly identifying edible oil
  • Gas-chromatography fingerprinting for rapidly identifying edible oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] 1. Establishment of fingerprints of volatile components in peanut oil

[0032] Using 6 batches of Arowana peanut oil as a standard, the gas chromatography fingerprints of its volatile components were established:

[0033] Use Agilent 6820 gas chromatograph, flame ionization detector, solid phase microextraction head and handle;

[0034] Measure 10 ml of sample and seal it in a 20 ml headspace vial, equilibrate in a water bath at 50°C for 15 minutes, insert the extraction head, extract in the headspace at 50°C for 15 minutes, insert into a gas chromatograph for sample injection, and desorb at 220°C 3 minutes, carry out chromatographic analysis;

[0035] Chromatographic conditions:

[0036] SUPELCOWAX 10 capillary column: 30m x 0.25mm x 0.25um;

[0037] Injection temperature is 220°C;

[0038] The temperature of the flame ionization detector is 270°C,

[0039] Carrier gas (carrier gas is nitrogen) speed: 1.0 ml / min;

[0040] Air flow rate: 400ml / min;

[0041] Hydro...

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PUM

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Abstract

The invention provides a gas chromatographic fingerprint method for fast distinguishing edible oil, comprising the following steps of: A. establishing a fingerprinting for the volatile constituents of the edible oil: the edible oil with the same origin and brand is used as a proof sample and the gas chromatographic fingerprinting of the volatile constituents thereof is established by gas chromatographic analysis; and B. detecting samples: an edible oil sample to be detected is taken and treated with sampling with the proof sample under the same condition to obtain the fingerprinting of the detected sample, the fingerprinting of the two is taken as the qualitative base by the analysis of a direct observational method and fingerprinting software. By the observation of the methodology, the fingerprinting made by the volatile constituents of the edible oil proves that the precision, the stability and the reproducibility thereof all have better application prospect, thus being suitable for generalization in the technical field of food safety detection.

Description

technical field [0001] The invention relates to a gas chromatography fingerprint method for rapidly identifying edible oil, belonging to the technical field of gas chromatography analysis. Background technique [0002] Edible oil is a necessity in people's life, and it is an important food that provides human body heat and essential fatty acids and promotes the absorption of fat-soluble vitamins. Driven by commercial interests, cheap vegetable oils or even inferior oil products are frequently used instead of genuine ones in the market, deceiving consumers, harming the interests of consumers, and even causing harm to human health. At present, traditional physical and chemical methods are used in the monitoring of edible oils and fats at home and abroad. With the diversification and complexity of adulterated varieties, these monitoring methods have become difficult to make accurate judgments, and even misjudgments have occurred. Volatile components are an important character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N33/03
Inventor 吴广臣赵志磊李小亭王庭欣刘峥颢夏立娅庞艳苹
Owner HEBEI UNIVERSITY
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