CN202533395U - Connecting structure of small-bore capillary column and TCD - Google Patents
Connecting structure of small-bore capillary column and TCD Download PDFInfo
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- CN202533395U CN202533395U CN2012201127805U CN201220112780U CN202533395U CN 202533395 U CN202533395 U CN 202533395U CN 2012201127805 U CN2012201127805 U CN 2012201127805U CN 201220112780 U CN201220112780 U CN 201220112780U CN 202533395 U CN202533395 U CN 202533395U
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- capillary column
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- thermal conductivity
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Abstract
The utility model provides a connecting structure of a small-bore capillary column and a TCD (Thermal Conductivity Detector). The connecting structure is characterized by comprising a hollow connecting body, and the inner cavity of the connecting body is respectively communicated with a TCD inlet, the small-bore capillary column and a make-up gas inlet. The small-bore capillary column is connected with the TCD through a make-up system. On the basis that the limit of detection of the TCD is ensured, the advantages of the capillary column such as good degree of separation, high column efficiency, good peak shape and the like can be exerted, the good analysis accuracy and repeatability is ensured, and the range of application of the TCD can also be expanded. The good analysis to complex and special components is realized, and the perfect analysis effect is finally realized.
Description
Technical field
The utility model relates to the thermal conductivity detector (TCD) structure, with the connection technique of small-bore capillary column and thermal conductivity detector (TCD).
Background technology
TCD (thermal conductivity detector (TCD)) is a kind of common detector; Be to utilize the thermal conductivity coefficient of tested component and carrier gas different and the concentration detector of response all has signal response to all materials, stable performance; Except detecting organism; Can also detect some does not upward have response or the very little material of response at FID (flame ionization detector), such as inert gas, permanent gas, CO2, NOx, H2O etc., so TCD is widely used in above-mentioned field.
But general T CD conductance cell volume is bigger; Sample component can be spread after getting into conductance cell; Cause concentration of component to descend, thus need bigger column load amount and flow velocity to guarantee the detectability that TCD is enough, so general T CD generally uses chromatography column to separate.But chromatography column still has shortcoming analytically:
1, theoretical cam curve is low, has only several thousand, can cause degree of separation to reduce;
2, the post effect is low, can cause the peak shape broad, even hangover;
3, the immobile liquid loss is bigger, causes inferior separating effect, and the chromatographic column life-span is shorter;
4, analytical cycle is long.
Above-mentioned deficiency all has the application that can have influence on TCD, especially at major component content big or sample comparatively complicated in, be difficult to guarantee to analyze quantitatively with accuracy qualitatively.
The utility model content
The utility model provides a kind of small-bore capillary column and thermal conductivity detector (TCD) draw bail; Its objective is and solve the shortcoming that prior art exists; Provide a kind of degree of separation high; Accuracy quantitatively and qualitatively that big or sample can guarantee in comparatively complicated to analyze at major component content, analytical cycle weak point, the gas chromatograph structure of long service life.
The utility model solves the technical scheme that its technical matters adopted:
Small-bore capillary column and thermal conductivity detector (TCD) draw bail is characterized in that: have the connected body of a hollow, the inner chamber of connected body is UNICOM's thermal conductivity detector (TCD) inlet, small-bore capillary column, make-up gas? air intake opening respectively.
Said connected body is provided with going up of a hollow and connects the external thread post; One end of a two-way inner nut is arranged on the thermal conductivity detector (TCD) inlet, and the other end is arranged in and connects on the external thread post; The glass bushing pipe passes and connects the external thread post behind the post, and an end of glass bushing pipe inserts in the thermal conductivity detector (TCD) inlet behind the post, and the other end inserts the inner chamber of connected body, behind the post glass bushing pipe with on be connected between the external thread post and be provided with hermetically-sealed construction; Glass bushing pipe behind the insertion post behind the inner chamber of small-bore capillary column insertion connected body.
Said connected body is provided with the following connection external thread post of a hollow, and small-bore capillary column passes down and connects the inner chamber that inserts connected body behind the external thread post, small-bore capillary column with under be connected between the external thread post and be provided with hermetically-sealed construction.
The usefulness of the utility model is:
Small-bore capillary column is compared with packed column, has the following advantages:
1, has excellent inertia, both do not had the activity that carrier causes, also do not have tube wall residual silicon alkyl, help very much the analysis of micro-polar compound;
2, having higher total post imitates.When adopting optimum flow rate, the total post of general capillary column is imitated and can be reached 1,000,000 theoretical cam curves.This numeral generally can satisfy several analyses to more than ten components, and all can reach or be superior to the degree of separation of packed column, and analysis time is than packed column much shorter.
3, has the peak shape of improvement effect.When major component content is big, can make peak shape more sharp-pointed through optimal conditions such as adjusting shuntings, improve the peak shape symmetry, under the prerequisite that guarantees degree of separation, can make qualitative, quantitatively more accurate.
4, have longer serviceable life, shorten analytical cycle, improve analysis efficiency.
The utility model connects the TCD thermal conductivity detector (TCD) with small-bore capillary column through a tail system of blowing; On the basis of the detectability that guarantees the TCD detecting device; Can bring into play advantages such as the excellent degree of separation of capillary column is good, post is imitated height, peak shape is good, guarantee good precision of analysis and repeatability, can also expand the range of application of TCD detecting device; Realize complicated and the good analysis of particular components, finally realize perfect analytical effect.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of TCD;
Fig. 2 is the structural representation of the utility model.
Embodiment
As shown in Figure 1, be the general structure of existing TCD thermal conductivity detector (TCD) 100, have conductance cell body 200, RTD 300, well heater 400, heat-insulation layer 900 etc. in it, have thermal conductivity detector (TCD) inlet 500 and thermal conductivity detector (TCD) outlet 600 outside it.
As shown in Figure 2, the utlity model has the connected body 4 of a hollow, hollow connected body 4 is provided with a make-up gas? air intake opening 40, the inner chamber UNICOM of make-up gas? air intake opening 40 and connected body 4.
Connected body 4 is provided with going up of a hollow and connects external thread post 41; One end of a two-way inner nut 3 is arranged on the thermal conductivity detector (TCD) shown in Figure 1 inlet 500, and the other end is arranged in and connects on the external thread post 41, thus with connected body 4 and thermal conductivity detector (TCD) 100 be linked together; Glass bushing pipe 1 passes the upward connection external thread post 41 of hollow behind the post; An end of glass bushing pipe 1 inserts in the thermal conductivity detector (TCD) inlet 500 behind the post; The other end inserts the inner chamber of connected body 4, is arranged with graphite pressure ring 2 behind the post on the glass bushing pipe 1, after two-way inner nut 3 screws tight; Graphite pressure ring 2 press closer the end face of thermal conductivity detector (TCD) inlet 500 with on be connected the end face of external thread post 41, thereby play sealing function.
Also be provided with the following connection external thread post 42 of a hollow on the connected body 4; After small-bore capillary column 9 passes down and connects external thread post 41 backs and insert the inner chamber of connected bodies 4 and insert post in the glass bushing pipe 1; Order is arranged with pressure pad 7, sheath 6, graphite pressure ring 5 on the small-bore capillary column 9; An opening nut 8 is arranged in down and connects on the external thread post 42; Has step plane (not shown) within the opening nut 8; Order is arranged with pressure pad 7, sheath 6, graphite pressure ring 5 and passes opening nut 8 on the small-bore capillary column 9, and after opening nut 8 screws tight, thereby pressure pad 7, sheath 6, graphite pressure ring 5 press closer on the step plane set in end face that connects external thread post 42 down and opening nut 8 and play sealing function.
The number of assembling steps of the utility model is:
1, with glass bushing pipe 1 behind the graphite pressure ring 2 cover upper props;
2, the fine thread one end inhour screw-in of two-way nut 3 is gone up on the connection external thread post 41;
3, the end with glass bushing pipe 1 behind the post upwards inserts along thermal conductivity detector (TCD) inlet 500; The other end of glass bushing pipe 1 inserts coarse thread one end (attention is inserted too not tight) in the inner chamber that inserts connected body 4 of two-way nut 3 behind the post.Then glass bushing pipe 1 behind the post is upwards pushed away together with connected body 4, coarse thread one end of two-way nut 3 is arranged on the external thread of thermal conductivity detector (TCD) inlet 500 and screw two-way nut 3 up to graphite pressure ring 2 press closer the end face of thermal conductivity detector (TCD) inlet 500 with on be connected the end face of external thread post 41 and seal;
4, on small-bore capillary column 9 styletable heads, be inserted in pressure pad 7, sheath 6, graphite pressure ring 5 in order;
5, small-bore capillary column 9 inserts the inner chamber that connects external thread post 42 down and get into connected body 4, after inserting post in the glass bushing pipe 1;
6, opening nut 8 is inserted in along open slot from the side of small-bore capillary column 9; And opening nut 8 is arranged in down connects on the external thread post 42, hand-tight make-up presses closer on the step plane set in end face that connects external thread post 42 down and opening nut 8 and air tight up to pressure pad 7, sheath 6, graphite pressure ring 5.When the utility model uses; Glass bushing pipe 1 got into thermal conductivity detector (TCD) 100 by thermal conductivity detector (TCD) inlet 500 again after analytical gas got into post from small-bore capillary column 9; Make-up gas? gets into the inner chamber of connected body 4 from make-up gas? air intake opening 40 simultaneously; Get into glass bushing pipe 1 behind the post again, get into thermal conductivity detector (TCD)s 100 by thermal conductivity detector (TCD) inlet 500 again.
Claims (3)
1. small-bore capillary column and thermal conductivity detector (TCD) draw bail is characterized in that: have the connected body of a hollow, the inner chamber of connected body is UNICOM's thermal conductivity detector (TCD) inlet, small-bore capillary column, make-up gas? air intake opening respectively.
2. small-bore capillary column as claimed in claim 1 and thermal conductivity detector (TCD) draw bail is characterized in that: said connected body is provided with going up of a hollow and connects the external thread post; One end of a two-way inner nut is arranged on the thermal conductivity detector (TCD) inlet, and the other end is arranged in and connects on the external thread post; The glass bushing pipe passes and connects the external thread post behind the post, and an end of glass bushing pipe inserts in the thermal conductivity detector (TCD) inlet behind the post, and the other end inserts the inner chamber of connected body, behind the post glass bushing pipe with on be connected between the external thread post and be provided with hermetically-sealed construction; Glass bushing pipe behind the insertion post behind the inner chamber of small-bore capillary column insertion connected body.
3. small-bore capillary column as claimed in claim 1 and thermal conductivity detector (TCD) draw bail; It is characterized in that: said connected body is provided with the following connection external thread post of a hollow; Small-bore capillary column passes down and connects the inner chamber that inserts connected body behind the external thread post, small-bore capillary column with under be connected between the external thread post and be provided with hermetically-sealed construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201127805U CN202533395U (en) | 2012-03-23 | 2012-03-23 | Connecting structure of small-bore capillary column and TCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201127805U CN202533395U (en) | 2012-03-23 | 2012-03-23 | Connecting structure of small-bore capillary column and TCD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533395U true CN202533395U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201127805U Expired - Fee Related CN202533395U (en) | 2012-03-23 | 2012-03-23 | Connecting structure of small-bore capillary column and TCD |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533395U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203769A (en) * | 2021-04-15 | 2021-08-03 | 电子科技大学 | High-air-tightness micro thermal conductivity detector and manufacturing method thereof |
-
2012
- 2012-03-23 CN CN2012201127805U patent/CN202533395U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203769A (en) * | 2021-04-15 | 2021-08-03 | 电子科技大学 | High-air-tightness micro thermal conductivity detector and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130323 |