JPH02183160A - Tubule connection device for gas chromatograph - Google Patents
Tubule connection device for gas chromatographInfo
- Publication number
- JPH02183160A JPH02183160A JP256889A JP256889A JPH02183160A JP H02183160 A JPH02183160 A JP H02183160A JP 256889 A JP256889 A JP 256889A JP 256889 A JP256889 A JP 256889A JP H02183160 A JPH02183160 A JP H02183160A
- Authority
- JP
- Japan
- Prior art keywords
- capillary
- port
- tubular body
- diameter
- tubular member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000005239 tubule Anatomy 0.000 title abstract 3
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 239000012491 analyte Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000012856 packing Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract 2
- 239000011804 chemically inactive material Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 229920001721 polyimide Polymers 0.000 description 5
- 239000009719 polyimide resin Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000005350 fused silica glass Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6004—Construction of the column end pieces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6034—Construction of the column joining multiple columns
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 この発明はガスクロマトグラフ用細管接続具に関する。[Detailed description of the invention] <Industrial application field> This invention relates to a capillary connector for gas chromatographs.
〈従来の技術〉
ガスクロマトグラフは気体に混在する成分を分離し、定
量分析する装置として種々の分野で用いられている。<Prior Art> Gas chromatographs are used in various fields as devices for separating and quantitatively analyzing components mixed in gases.
ガスクロマトグラフは恒温槽とこの恒温槽内に納められ
たキャピラリカラム又はバツクドカラムと称する細管を
有しており、該細管に分析対象である気体を通過させて
成分の分離を行なう構成になっている。A gas chromatograph has a constant temperature bath and a thin tube called a capillary column or back column housed in the constant temperature bath, and the gas to be analyzed is passed through the thin tube to separate components.
該細管は恒温槽に設けられたインジェクションポートと
検出ポートに直接または接続用の細管を介して接続し１
分析対象気体をインジェクションポートから取入れ検出
ポートから検出器へと送出する構成になっている。The thin tube is connected directly or via a thin tube for connection to an injection port and a detection port provided in a thermostatic chamber.
The structure is such that the gas to be analyzed is taken in through the injection port and sent out to the detector through the detection port.
このような細管と恒温槽との接続構造の従来の構成を第
４図に示す。恒温槽Ｘ′に設けられたインジェクション
ポート８１９′には恒温槽Ｘ内部に突出する突出ネジ部
６′が接続している。突出ネジ部６１の内部には接続管
５１が嵌合されており、この接続管５１は突出ネジ部６
′にねじ込まれた袋ナツト４′によりパツキン５′を介
して締め付けられ保持されている。この接続管５１にキ
ャピラリ５０が下側から嵌入し、接続管５１の下端部内
側に形成されたネジ部にねじ込まれたネジ５２と締結セ
グメント５３とにより接続管５１に支持されている。更
にキャピラリ５０の上端は接続管５１の上端に装着され
たインサート５４に嵌挿され、このインサート５４を介
して分析対象気体を取り込むように構成されている。FIG. 4 shows a conventional structure for connecting such a thin tube and a thermostatic chamber. A protruding screw portion 6' that protrudes into the inside of the thermostatic oven X is connected to an injection port 819' provided in the thermostatic oven X'. A connecting pipe 51 is fitted inside the protruding threaded part 61 , and this connecting pipe 51 is connected to the protruding threaded part 6 .
It is tightened and held by a cap nut 4' screwed into ' through a packing 5'. A capillary 50 is fitted into the connecting tube 51 from below and is supported by the connecting tube 51 by a screw 52 screwed into a threaded portion formed inside the lower end of the connecting tube 51 and a fastening segment 53. Further, the upper end of the capillary 50 is fitted into an insert 54 attached to the upper end of the connecting tube 51, and the gas to be analyzed is introduced through the insert 54.
〈発明が解決しようとする課題〉
しかし、上記した従来の接続構造は部品数が多く構造も
複雑であり、コストが高く組立作業も難しい欠点があっ
た。また接続管５１とネジ５２はねじ込み構造であるた
め金属等が用いられるため分析対象気体中の成分の吸着
などを生じ分析精度に悪影響を及ぼす懸念があった。<Problems to be Solved by the Invention> However, the above-mentioned conventional connection structure has the drawbacks of a large number of parts and a complicated structure, high cost, and difficult assembly work. Furthermore, since the connecting tube 51 and the screw 52 have a screw-in structure and are made of metal or the like, there is a concern that components in the gas to be analyzed may be adsorbed, which may adversely affect analysis accuracy.
〈発明の概要〉
本発明は上記した問題点を改善するためになされたもの
で、構造が簡単でしかも化学的に不活性な材質を使用で
きる細管接続具を提供することを目的とする。この目的
のために本発明のガスクロマトグラフ用細管接続具は、
被分析対象物を送通する管状体と、該管状体の一端に形
成された恒温槽のポートに接続されるポート接続部と、
該管状体の他端側に形成された細管挿入部とを有し；該
細管挿入部が、該管状体本体の他端内側に他端側から所
定の長さにわたって漸次径小となるように形成され、か
つ最軽小部が接続する細管外径より径小な絞り部を有す
ることを基本的な特徴とするものである。<Summary of the Invention> The present invention was made in order to improve the above-mentioned problems, and it is an object of the present invention to provide a capillary connector that has a simple structure and can use chemically inert materials. For this purpose, the gas chromatograph capillary connector of the present invention is
a tubular body through which an analyte is passed; a port connection portion connected to a port of a constant temperature chamber formed at one end of the tubular body;
a thin tube insertion portion formed on the other end side of the tubular body; the thin tube insertion portion has a diameter gradually decreasing over a predetermined length from the other end inside the other end of the tubular body main body; The basic feature is that the narrowest part has a diameter smaller than the outer diameter of the capillary tube to which the lightest and smallest part is connected.
〈実施例〉 以下本発明の一実施例を図面に基づいて説明する。<Example> An embodiment of the present invention will be described below based on the drawings.
まず、第３図に基づいて全体の構成の概要を説明する。First, an overview of the overall configuration will be explained based on FIG.
恒温槽Ｘ内部にはキャピラリカラム７が巻かれた状態で
収納されている。キャピラリカラム７はこの実施例では
ガラス製のものを用いており、可撓性に欠けるためキャ
ピラリカラム７の両端に細管である接続キャピラリ３，
３を接続している。A capillary column 7 is housed inside the constant temperature bath X in a wound state. The capillary column 7 is made of glass in this embodiment, and since it lacks flexibility, connecting capillaries 3, which are thin tubes, are installed at both ends of the capillary column 7.
3 is connected.
この接続キャピラリ３は後述するようにポリイミド樹脂
３０と溶融シリカ３１から形成され可撓性を有している
。恒温槽Ｘはインジェクションポート８と検出ポート９
とを有しており、このインジェクションポート８と検出
ポート９にキャピラリカラム７の両端を接続キャピラリ
３，３を介して接続するようになっている。即ち、キャ
ピラリカラム７に接続された接続キャピラリ３，３は被
分析対象物を送通する管状体１と袋ナツト４を介して夫
々インジェクションポート８、検出ポート９に接続され
ている。インジェクションポート８はキャリヤガス源（
図示せず）に接続し、その上端から注射器等により注入
された分析対象気体をキャリヤガスと共にキャピラリカ
ラム７に送出する。This connecting capillary 3 is made of polyimide resin 30 and fused silica 31 and has flexibility, as will be described later. Constant temperature chamber X has injection port 8 and detection port 9
Both ends of the capillary column 7 are connected to the injection port 8 and the detection port 9 via connecting capillaries 3, 3. That is, the connecting capillaries 3, 3 connected to the capillary column 7 are connected to the injection port 8 and the detection port 9, respectively, via the tubular body 1 through which the analyte is passed and the cap nut 4. Injection port 8 is a carrier gas source (
(not shown), and the gas to be analyzed injected from the upper end with a syringe or the like is sent to the capillary column 7 along with the carrier gas.
検出ポート９は検出器１０に接続されており、ここで分
離された成分を検出するように構成されている。Detection port 9 is connected to a detector 10 and is configured to detect the separated components therein.
管状体１と、これを用いた接続キャピラリ３とインジェ
クションポート８、検出ポート９の接続構造を第１図と
第２図により説明する。接続キャピラリ３とインジェク
ションポート８、接続キャピラリ３と検出ポート９の接
続構造は同一である。A connection structure between a tubular body 1, a connecting capillary 3, an injection port 8, and a detection port 9 using the tubular body 1 will be explained with reference to FIGS. 1 and 2. The connection structure between the connection capillary 3 and the injection port 8 and between the connection capillary 3 and the detection port 9 are the same.
接続キャピラリ３とインジェクションポート８又は検出
ポート９の間に管状体１が介装されている。管状体１は
この実施例ではガラス製のものを用いている。管状体１
の上端はインジェクションポート８または検出ポート９
に接続されるポート接続部Ａになっており、また管状体
１の下端は細管である接続キャピラリ３を挿入する細管
挿入部Ｂになっている。A tubular body 1 is interposed between the connecting capillary 3 and the injection port 8 or the detection port 9. In this embodiment, the tubular body 1 is made of glass. tubular body 1
The upper end of is injection port 8 or detection port 9
The lower end of the tubular body 1 is a thin tube insertion portion B into which a connecting capillary 3, which is a thin tube, is inserted.
インジェクションポート８又は検出ポート９は恒温槽Ｘ
の内部側に突出する突出ネジ部６に連通しており、管状
体１の上端部のポート接続部Ａはこの突出ネジ部６の内
部に嵌入している。突出ネジ部６の外側には袋ナツト４
がねじ込まれており、袋ナツト４と管状体１の間にはパ
ツキン５が介装されている。このパツキン５により、管
状体１のポート接続部Ａと突出ネジ部６の間をシールす
ると共に管状体１を締め付けて突出ネジ部６に締結する
構成になっている。Injection port 8 or detection port 9 is a constant temperature bath
The port connecting portion A at the upper end of the tubular body 1 is fitted into the inside of the projecting threaded portion 6 . A cap nut 4 is attached to the outside of the protruding screw portion 6.
is screwed in, and a packing 5 is interposed between the cap nut 4 and the tubular body 1. This packing 5 seals between the port connecting portion A of the tubular body 1 and the protruding threaded portion 6, and also tightens the tubular body 1 and fastens it to the protruding threaded portion 6.
管状体１の下端部側の細管挿入部Ｂ内側には絞り部２が
形成されている。この絞り部２は下端部側の開口から次
第にその径を小さくする漸縮部２１と、最も径の小さく
なる最軽小部２０及び最軽小部２０から上方に向けて次
第に径が大きくなる漸拡部２２から形成されている。該
最軽小部２０はここに嵌挿する細管である接続キャピラ
リ３の外径よりも径小になっており、接続キャピラリ３
をその内壁で挟持する構成になっている。A constricted portion 2 is formed inside the thin tube insertion portion B on the lower end side of the tubular body 1 . This constriction part 2 includes a gradually decreasing part 21 whose diameter gradually decreases from the opening on the lower end side, a lightest and smallest part 20 where the diameter becomes the smallest, and a gradually increasing diameter from the lightest and smallest part 20 upward. It is formed from an enlarged portion 22. The lightest and smallest portion 20 has a diameter smaller than the outer diameter of the connecting capillary 3, which is a thin tube inserted here.
The structure is such that it is held between its inner walls.
接続キャピラリ３は第２図に示すように溶融シリカ３１
の外側にポリイミド樹脂３０を被覆した構造になってお
り、このポリイミド樹脂３０により可撓性を有すると同
時に、軟質性を有している。The connecting capillary 3 is made of fused silica 31 as shown in FIG.
It has a structure in which the outside thereof is covered with a polyimide resin 30, and the polyimide resin 30 provides flexibility and softness.
そのため、接続キャピラリ３を管状体１の細管挿入部Ｂ
下端から挿入すれば、接続キャピラリ３の外周は次第に
漸縮部２１の内壁に接近し、最軽小部２０の手前で接続
キャピラリ３の外径と漸縮部２１の内径が同一になる位
置で接触する。そして、更に接続キャピラリ３を押し込
めば、接続キャピラリ３のポリイミド樹脂３０が漸縮部
２１の形状に倣って変形を起こし、漸縮部２１と密着し
て保持部３２を形成する。この保持部３２により接続キ
ャピラリ３は気密に保持されるようになっている。保持
部３２は恒温槽Ｘ内で一定の温度に加熱されることによ
り溶着し、より強固に保持されると考えられる。接続キ
ャピラリ３は必ずしも全体にその外周が軟質性を有する
ことはなく、漸縮部２１と少なくとも接触する保持部３
２が軟質性を有すれば管状体１と接続することは可能で
ある。Therefore, connect the connecting capillary 3 to the thin tube insertion part B of the tubular body 1.
When inserted from the lower end, the outer circumference of the connecting capillary 3 gradually approaches the inner wall of the constricting part 21, and the outer diameter of the connecting capillary 3 becomes the same as the inner diameter of the constricting part 21 before the lightest and smallest part 20. Contact. Then, when the connecting capillary 3 is further pushed in, the polyimide resin 30 of the connecting capillary 3 is deformed following the shape of the constricting portion 21, and comes into close contact with the constricting portion 21 to form a holding portion 32. The connecting capillary 3 is held airtight by this holding portion 32. It is thought that the holding part 32 is welded by being heated to a constant temperature in the constant temperature bath X, and is held more firmly. The connecting capillary 3 does not necessarily have a soft outer periphery as a whole, and the holding portion 3 that is in at least contact with the constricting portion 21
If 2 has flexibility, it is possible to connect it to the tubular body 1.
なお、上記実施例ではキャピラリカラム７に接続キャピ
ラリ３を接続し、この接続キャピラリ３を管状体１に挿
入しているが、これに限定されるものではなく、ポリイ
ミド樹脂を表面に塗布した溶融シリカ細管の内面に固定
相を形成してカラムにした通常のキャピラリカラムもそ
のまま管状体１に直接装着することが可能である。In the above embodiment, the connecting capillary 3 is connected to the capillary column 7, and this connecting capillary 3 is inserted into the tubular body 1, but the invention is not limited to this. An ordinary capillary column, which is formed by forming a stationary phase on the inner surface of a thin tube to form a column, can also be directly attached to the tubular body 1 as is.
以上説明した接続構造は接続キャピラリ３と恒温槽Ｘ側
の部材である袋ナツト４．パツキン５、突出ネジ部６と
の間に介在する部品が管状体１のみであるため、構造が
簡単でコストを低減することが出来る。また、接続キャ
ピラリ３を管状体１の細管挿入部Ｂの下側から押し込む
だけでよいため接続作業がきわめて容易で迅速に行える
。更に管状体１にはネジ部などを形成する必要がなく。The connection structure explained above consists of the connection capillary 3 and the cap nut 4, which is a member on the thermostatic chamber X side. Since the tubular body 1 is the only component interposed between the packing 5 and the protruding screw portion 6, the structure is simple and costs can be reduced. Further, since it is only necessary to push the connecting capillary 3 from below the thin tube insertion portion B of the tubular body 1, the connection work can be performed extremely easily and quickly. Furthermore, there is no need to form a threaded portion on the tubular body 1.
絞り部２を形成すれば良いため、ガラス等の不活性の材
質を使用することができ１分析対象気体の成分を吸着す
る等の悪影響が生ずる危険がない。Since the constriction part 2 only needs to be formed, an inert material such as glass can be used, and there is no risk of adverse effects such as adsorption of components of the gas to be analyzed.
〈発明の効果〉
以上説明したように本発明のガスクロマトグラフ用細管
接続具は、被分析対象物を送通する管状体と、該管状体
の一端に形成された恒温槽のポートに接続されるポート
接続部と、該管状体の他端側に形成された細管挿入部と
を有し；該細管挿入部が、該管状体本体の他端内側に他
端側から所定の長さにわたって漸次径小となるように形
成され、かつ最軽小部が接続する細管外径より径小な絞
り部を有するため、構造が簡単でそのためコストの低減
を図れ、また組立作業を容易に出来る。また、部品に金
属などを用いる必要がないため、８ｉ！Ｉ定精度に悪影
響を与える危険がない等の効果がある。<Effects of the Invention> As explained above, the gas chromatograph capillary connector of the present invention is connected to a tubular body through which an analyte is passed and a port of a constant temperature bath formed at one end of the tubular body. It has a port connection part and a capillary insertion part formed on the other end side of the tubular body; the capillary insertion part gradually increases the diameter over a predetermined length from the other end inside the other end of the tubular body main body. Since it is formed to be small and has a constricted portion with a diameter smaller than the outer diameter of the thin tube to which the lightest and smallest portion is connected, the structure is simple, which reduces costs and facilitates assembly. In addition, since there is no need to use metal for parts, 8i! This has the advantage that there is no danger of adversely affecting I-determined accuracy.
第１図は本発明の一実施例を示す正断面図、第２図はそ
の部分拡大図、第３図は全体の構造を示す外略図、第４
図は従来の接続構造を示す正断面図である。
１：管状体、２：絞り部、３：接続キャピラリ、４：袋
ナツト、５：パツキン、６：突出ネジ部、７：キャピラ
リカラム、８：インジェクションポート、９：検出ポー
ト、１０：検出器、２０：最径小部、２１：漸縮部、２
２：漸拡部、３０：ポリイミド樹脂、３１：溶融シリカ
、３２：保持部、５゛Ｏ：キャピラリ、５１：接続管、
５２：ネジ、５３：締結セグメント、５４：インサート
。
特許出願人 財団法人 化学品検査協会代理人
弁理士 高 橘 清 外１名第
図
第
図Fig. 1 is a front sectional view showing one embodiment of the present invention, Fig. 2 is a partially enlarged view thereof, Fig. 3 is a schematic diagram showing the overall structure, and Fig. 4 is a front sectional view showing an embodiment of the present invention.
The figure is a front sectional view showing a conventional connection structure. 1: Tubular body, 2: Throttle part, 3: Connection capillary, 4: Cap nut, 5: Packing, 6: Projecting screw part, 7: Capillary column, 8: Injection port, 9: Detection port, 10: Detector, 20: Smallest diameter part, 21: Retarding part, 2
2: gradual expansion part, 30: polyimide resin, 31: fused silica, 32: holding part, 5゛O: capillary, 51: connecting pipe,
52: screw, 53: fastening segment, 54: insert. Patent applicant Agent of Chemical Inspection Association
Patent attorney Kiyoshi Taka Tachibana and 1 other person
Claims (1)
るポート接続部と、 該管状体の他端側に形成された細管挿入部とを有し； 該細管挿入部が、該管状体本体の他端内側に他端側から
所定の長さにわたって漸次径小となるように形成され、
かつ最径小部が接続する細管外径より径小な絞り部を有
する、 ことを特徴とするガスクロマトグラフ用細管接続具。[Scope of Claims] A tubular body through which an analyte is conveyed, a port connection portion formed at one end of the tubular body and connected to a port of a constant temperature chamber, and a port connection portion formed at the other end of the tubular body. a thin tube insertion portion; the thin tube insertion portion is formed inside the other end of the tubular body main body so that the diameter gradually decreases over a predetermined length from the other end side;
A capillary connector for a gas chromatograph, characterized in that the smallest diameter part has a constricted part with a diameter smaller than the outer diameter of the capillary to which it is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1002568A JP2759668B2 (en) | 1989-01-09 | 1989-01-09 | Gas chromatograph capillary fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1002568A JP2759668B2 (en) | 1989-01-09 | 1989-01-09 | Gas chromatograph capillary fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02183160A true JPH02183160A (en) | 1990-07-17 |
| JP2759668B2 JP2759668B2 (en) | 1998-05-28 |
Family
ID=11532973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1002568A Expired - Lifetime JP2759668B2 (en) | 1989-01-09 | 1989-01-09 | Gas chromatograph capillary fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2759668B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318224A (en) * | 2001-02-23 | 2002-10-31 | Agilent Technol Inc | Fluid tight sealing technique for capillary column |
| US20220276208A1 (en) * | 2019-01-14 | 2022-09-01 | Agilent Technologies, Inc. | Versatile tube-free jet for gas chromatography detector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950310A (en) * | 1982-09-14 | 1984-03-23 | Toshiba Corp | Ultrasonic sight through device for atomic reactor |
-
1989
- 1989-01-09 JP JP1002568A patent/JP2759668B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950310A (en) * | 1982-09-14 | 1984-03-23 | Toshiba Corp | Ultrasonic sight through device for atomic reactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318224A (en) * | 2001-02-23 | 2002-10-31 | Agilent Technol Inc | Fluid tight sealing technique for capillary column |
| US20220276208A1 (en) * | 2019-01-14 | 2022-09-01 | Agilent Technologies, Inc. | Versatile tube-free jet for gas chromatography detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2759668B2 (en) | 1998-05-28 |
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