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Method for determining chemical composition in white spirit by adopting comprehensive two-dimensional gas chromatography-time of flight mass spectrometry

A technology of two-dimensional gas chromatography and time-of-flight mass spectrometry, which is used in material separation, analysis of materials, measurement devices, etc., can solve the problems of long time consumption and few detected components, and achieves short time consumption, accurate and reliable results, and high safety. Effect

Active Publication Date: 2015-08-19
ANHUI RUISIWEIER TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for qualitative liquor components that is simple in sample pretreatment and capable of detecting more components.

Method used

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  • Method for determining chemical composition in white spirit by adopting comprehensive two-dimensional gas chromatography-time of flight mass spectrometry
  • Method for determining chemical composition in white spirit by adopting comprehensive two-dimensional gas chromatography-time of flight mass spectrometry
  • Method for determining chemical composition in white spirit by adopting comprehensive two-dimensional gas chromatography-time of flight mass spectrometry

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0031] Instrument: Leco Pegasus 4D comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOFMS); equipped with Agilent 7890B two-dimensional gas chromatography, Gerstel MPS (Gerstel GmbH, Mulheimander Ruhr, Germany) autosampler.

[0032] Reagents: absolute ethanol, chromatographically pure; NaCl, analytically pure.

[0033] Dilute the wine sample to be tested with deionized water to a final alcohol content of 13%vol; pipette 9mL of the diluted wine sample into a 20mL headspace bottle, add 2gNaCl, tighten the cap of the headspace bottle, and use automatic solid-phase microextraction Adsorption and analysis of samples are carried out by automatic sampling method. The online solid-phase microextraction conditions are: the extraction head is a 50 / 30μm DVB / CAR / PDMS automatic extraction head, the sample incubation t...

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Abstract

The invention discloses a method for determining the chemical composition in white spirit by adopting comprehensive two-dimensional gas chromatography-time of flight mass spectrometry. The method comprises the steps of firstly, diluting a liquor sample to be detected by deionized water until the final alcohol content is 10-15% vol, sucking 8-10mL of diluted liquor sample into a 20mL headspace bottle, and feeding 1-3g of NaCl; after that, enriching the components in the liquor sample by headspace solid-phase micro-extraction; finally, determining by the comprehensive two-dimensional gas chromatography-time of flight mass spectrometry. According to the comprehensive two-dimensional gas chromatography, two chromatographic columns with different polarities are used for carrying out orthogonal separation on the components in the liquor sample; under the action of a modulator, detection is completed by the time of flight mass spectrometry; the method is simple in sample pretreatment way; analytical equipment has the characteristics of being high in flux, sensitivity and accuracy; the problems that the white spirit is complicated in composition, difficult to separate and hard in chemical composition determination can be solved; therefore, an effective way is provided for further analyzing the trace composition of the white spirit.

Description

technical field [0001] The invention relates to a method for analyzing test components, in particular to a method for analyzing components in liquor. Background technique [0002] Baijiu is a kind of distilled liquor unique to China, and it is one of the eight major distilled liquors in the world (Brandy, Whiskey, Vodka, Gin, Rum, Tequila, Sake, Chinese liquor Spirit) , Distilled from fermented grains made from starch or sugary raw materials or fermented. [0003] Aroma is people's first impression of liquor, and it is a very important factor to measure the quality of liquor. However, as there are differences in the components of the liquor, the liquor presents different aromas. There are tens of thousands of trace components in traditional Chinese solid-state fermented liquor, which can be divided into alcohols, acids, esters, aldehydes, ketones, ethers and heterocyclics in terms of component categories. How to comprehensively The characterization of these components is ...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 梁金辉徐祥浩刘国英汤有宏高江婧姜利李安军周庆伍
Owner ANHUI RUISIWEIER TECH
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