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Improved TVOC capillary column

A technology of capillary column and inner tube, which is applied in the field of chromatographic analysis, can solve the problems affecting the judgment of TVOC, large wall effect of capillary column, and inaccurate detection, so as to reduce the wall effect of the capillary column, broad application prospects, and accurate detection results. Effect

Inactive Publication Date: 2019-03-01
山东金普分析仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the TVOC detector in the prior art, due to the relatively large wall effect of the internal capillary column, it often occurs that the TVOC detector is not accurate enough to detect TVOC, thereby affecting the judgment of TVOC

Method used

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  • Improved TVOC capillary column
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Embodiment 1

[0024] see Figure 1~3 , in the embodiment of the present invention, an improved TVOC capillary column includes a joint 1, an outer shell 3 and a screw 12, and there are two joints 1 and two screws 12 respectively, and the bottom end of the joint 1 is fixedly arranged on the outer shell 3, the screw 12 is arranged on the top of the joint 1, and the function of the joint 1 and the screw 12 is to connect the outer shell 3 and the TVOC detector body fixedly; it also includes the inner tube 6, the fixing table 7 and the heating core 8, the outer casing 3 is inside the housing cavity 5, the fixed platform 7 is provided with a fixed platform cavity 9, the inner tube 6, the fixed platform 7 and the heating core 8 are arranged in the casing cavity 5, The heating core 8 is arranged in the inner cavity 9 of the fixed platform, the inner tube 6 is wrapped on the outer surface of the fixed platform 7 , and there is a gap between the outer wall 18 of the inner tube and the inner wall of th...

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Abstract

The invention discloses an improved TVOC capillary column, which belongs to the technical field of chromatographic analysis. The improved TVOC capillary column comprises connectors, an outer shell andscrews, wherein the number of the connectors and screws is respectively two, the bottom end of each connector is fixedly arranged on the upper surface of the top of the outer shell, the screws are arranged on the tops of the connectors, and the connectors and the screws are used for fixedly connecting the outer shell and a TVOC detector body; and the improved TVOC capillary column also comprisesan inner pipe, a fixed table and a heating core, wherein the interior of the outer shell is a shell inner cavity, a fixed table inner cavity is arranged inside the fixed table, the inner pipe, the fixed table and the heating core are arranged in the shell inner cavity, the heating core is arranged in the fixed table inner cavity, the inner pipe covers the outer surface of the fixed table, and a gap is formed between the outer side wall of the inner pipe and the inner side wall of the outer shell. By adopting the improved TVOC capillary column, the influence of the pipe wall effect for the capillary column can be reduced, the improved TVOC capillary column can be well applied to the TVOC detector, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field related to chromatographic analysis, in particular to an improved TVOC capillary column. Background technique [0002] In the chromatographic column, even with the best packing technology, the filling conditions in the center of the column and along the tube wall are always different. The part close to the tube wall is relatively loose, prone to channeling, and the flow rate is faster, which affects the flushing agent. This is the tube wall effect. The tube wall effect refers to the effect of the tube wall of the column on the inconsistency of the flow velocity at the center and edge of the column tube when the solute migrates with the mobile phase. In hollow capillary column chromatography, due to the tube wall effect, the flow pattern diffusion of the mobile phase, that is, radial diffusion, results in the expansion of the region. In packed column chromatography, the tube wall effect is not obvious due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/60
CPCG01N30/6047G01N30/606
Inventor 侯宗胜何荣文王绍武黄威超王睿
Owner 山东金普分析仪器有限公司