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Portable GC Capillary Column Modules

A capillary column and gas chromatography technology, which is applied in the field of gas chromatography analysis and testing, can solve the problems of capillary column and heating wire winding methods, such as complex winding, high price, and inability to disassemble, so as to reduce heat radiation loss and prevent convective heat loss , The effect of reducing power consumption

Active Publication Date: 2017-06-27
NUCTECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LTM technology also has its disadvantages: (1) The winding method of the capillary column and heating wire is complicated and must be realized by a professional winding device. Choice; (2) The heating wire and the chromatographic column are fixed as one, and the user cannot disassemble it. Once the chromatographic column or the heating wire is damaged, the entire module must be replaced; (3) The LTM module is expensive (one module is about 5,000 US dollars), thus restricting the user's choice of more chromatographic columns; (4) The winding method cannot make the diameter of the chromatographic column disk smaller (2 to 5 inches)

Method used

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  • Portable GC Capillary Column Modules
  • Portable GC Capillary Column Modules
  • Portable GC Capillary Column Modules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Such as Figure 1A , Figure 1B As shown, in this embodiment 1, the capillary column 6 is described by taking an MXT column with a specification of 5 m×0.25 mm i.d.×0.25 μm as an example. Due to the good elasticity of the capillary column 6, a thinner capillary column skeleton can be selected. The cap 2 is integrally connected with the capillary column framework 1 on the upper end surface of the capillary column framework 1 . The heating device 3 is inserted in the cavity of the capillary column framework 1 and coupled with the capillary column framework 1 through a thermal conductive paste 5 . The temperature measuring device 4 is closely attached to the inner wall of the capillary skeleton 1, and the heating device 3 and the temperature measuring device 4 are respectively drawn from the heating device outlet port 13 and the temperature measuring device outlet port 14 on the cap 2 and connected to the power supply and the temperature controller. The precise temperatu...

Embodiment 2

[0103] Similarly, this embodiment adopts Figure 1A and Figure 1B For the capillary column module as shown, the difference between this embodiment and Embodiment 1 is that, in this embodiment, the capillary column 6 is a quartz column with a specification of 30 m×0.25 mm i.d.×0.25 μm. All the capillary columns 6 are long in length and poor in elasticity, so the size of the capillary column skeleton 1 is larger than that of the embodiment 1. Apart from that, all other devices and their assembly in this embodiment are completely the same as those in Embodiment 1, and will not be repeated here. The total volume of the module in this embodiment is about: 100mm*100mm (2R*H).

Embodiment 3

[0105] In this embodiment, it is an application embodiment of expanding two modules of the present invention into a comprehensive two-dimensional gas chromatography module.

[0106] Figure 2A and Figure 2B It is a schematic diagram of an application embodiment in which the module of the present invention is extended to comprehensive two-dimensional or tandem chromatography in this embodiment. Such as Figure 2A and Figure 2B as shown, Figure 2A A single module in is Figure 1A and Figure 1B module shown. The capillary column properties of the two module assemblies are different. Use a two-pass modulator 21 to connect the first module (in Figure 2A in the left module) the capillary column outlet port 16 is connected to the second module (in the Figure 2A The capillary column inlet port 15 of the module on the right is connected in series, the capillary column inlet port 15 of the first module is connected to the injector 22, and the capillary column outlet port 1...

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Abstract

A portable gas chromatographic capillary column module provided by the invention comprises a capillary column framework, a cover cap, a heating component, a capillary column, a cylindrical shell and a heat-preserving hood, wherein a circular hole is axially formed from one end to the other end in the capillary column framework; the cover cap is connected with one end of the capillary column framework; the heating component is inserted into the circular hole; the capillary column is wound on the outer surface of a protective film; the capillary column framework is arranged inside the cylindrical shell; the heat-preserving hood hoods a finger-shaped cylinder formed by the cylindrical shell and the cover cap.

Description

technical field [0001] The invention relates to the field of gas chromatography analysis and testing, in particular to a portable gas chromatography capillary column module for gas chromatography. Background technique [0002] Capillary columns are responsible for the separation of mixed substance components in gas chromatography (GC), and are the key components of GC. The separation of substances by the capillary column needs to be carried out at a certain temperature. The heating / cooling rate and temperature uniformity of the chromatographic column are two important indicators of GC, which determine the separation ability and analysis speed of the GC. Therefore, it is necessary to heat the capillary column and temperature control design. [0003] The traditional furnace-type GC is to wind the capillary column into 7-8 inches of coils and hang it in a larger furnace, wrap the furnace with thick (3-5cm) insulation cotton, and heat the inside with a heating wire Air, the fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/30G01N30/60
Inventor 张清军李元景陈志强马秋峰赵自然何会绍刘以农刘耀红常建平邹湘谈林霞
Owner NUCTECH CO LTD
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