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Interface device and method for on-line coupling of liquid chromatography-gas chromatography/mass spectrum (LC-GC/MS)

A liquid chromatography and gas chromatography technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of inability to realize large-volume injection, limited solvent amount, low sensitivity, etc., and achieve shortened sample pretreatment steps and high sensitivity. , the effect of good separation

Active Publication Date: 2012-12-12
SHANGHAI TOBACCO GRP CO LTD
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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a liquid chromatography-gas chromatography / mass spectrometry online interface device and a method for analyzing aroma components in tobacco using this device, which is used to solve the existing problems. Low sensitivity in technology, limited amount of solvent transferred to gas chromatographic inlet, and inability to realize large-volume injection

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  • Interface device and method for on-line coupling of liquid chromatography-gas chromatography/mass spectrum (LC-GC/MS)
  • Interface device and method for on-line coupling of liquid chromatography-gas chromatography/mass spectrum (LC-GC/MS)

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[0034] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0035] see Figure 1 to Figure 2 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the sa...

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Abstract

The invention provides an interface device for on-line coupling of LC-GC / MS and a method for analyzing fragrant components in tobaccos by utilizing the device. According to the method, reverse blowing gas can be provided through switch of a gas switch valve, during sample injection, the reverse blowing gas is discharged form a GC flow-splitting port against the GC carrier gas direction through a tee coupling, therefore solvents can be transferred out completely, solutes are reserved in a TenaxTA absorbent in a PTV liner tube, thermal desorption is performed on a PTV injection port after the solvents are transferred completely, the GC carrier gas shifts cut fractions to be tested into a GC column for separation, effects on an MS vacuum system due to the fact the solvents enter the GC column are effectively avoided, and large volume injection can be achieved.

Description

technical field [0001] The invention relates to an interface technology, in particular to a liquid chromatography-gas chromatography / mass spectrometry online interface device and a method for analyzing aroma components in tobacco using the device. Background technique [0002] In tobacco and spice research, LC (liquid chromatography) is commonly used to pre-separate aromas into multiple fractions, and for aroma fractions of interest, GC / MS (gas chromatography / mass spectrometry) is used for further analysis. However, this traditional off-line method is complex in operation, low in sensitivity, poor in repeatability, and easily causes sample contamination. It is mainly used for separation and identification research, and is rarely used for routine quantitative analysis, especially trace component analysis. LC-GC online combination has high sensitivity, good repeatability, less pollution, automation, saving manpower, and its efficiency and effect are significantly better than t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 刘百战郭亚勤
Owner SHANGHAI TOBACCO GRP CO LTD
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