JPH0530134Y2 - - Google Patents
Info
- Publication number
- JPH0530134Y2 JPH0530134Y2 JP1986048793U JP4879386U JPH0530134Y2 JP H0530134 Y2 JPH0530134 Y2 JP H0530134Y2 JP 1986048793 U JP1986048793 U JP 1986048793U JP 4879386 U JP4879386 U JP 4879386U JP H0530134 Y2 JPH0530134 Y2 JP H0530134Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- silica glass
- fused silica
- glass capillary
- backflash
- 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.)
- Expired - Lifetime
Links
- 229930195733 hydrocarbon Natural products 0.000 claims description 23
- 150000002430 hydrocarbons Chemical class 0.000 claims description 18
- 239000005350 fused silica glass Substances 0.000 claims description 17
- 239000004215 Carbon black (E152) Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 13
- 238000005070 sampling Methods 0.000 description 8
- -1 methane hydrocarbons Chemical class 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はガスクロマトグラフイ分離を用いて大
気中の炭化水素を分析する装置に関するものであ
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for analyzing hydrocarbons in the atmosphere using gas chromatography separation.
（従来の技術）
大気中のメタン（CH4）とメタン以外の炭化水
素（以下、非メタン炭化水素という）を求める炭
化水素分析装置であるが、非メタン炭化水素は全
体の量として求めるためにバツクフラツシユ流路
構成をとつている。(Prior art) This is a hydrocarbon analyzer that detects methane (CH 4 ) and hydrocarbons other than methane (hereinafter referred to as non-methane hydrocarbons) in the atmosphere. It has a backflash flow path configuration.
第２図に本考案が対象とする炭化水素分析装置
の一例を示す。 FIG. 2 shows an example of a hydrocarbon analysis device to which the present invention is applied.
２はサンプリングのための切換えバルブ（以
下、サンプリングバルブという）であり、計量管
４が設けられ、一定量の試料が導入されるように
なつている。サンプリングバルブ２の下流にはバ
ツクフラツシユ用の切換えバルブ（以下バツクフ
ラツシユバルブという）６が設けられている。バ
ツクフラツシユバルブ６にはバツクフラツシユカ
ラム８が接続され、サンプリングバルブ２からの
ガスはバツクフラツシユバルブ６を経てバツクフ
ラツシユカラム８に導入される。 Reference numeral 2 denotes a switching valve for sampling (hereinafter referred to as sampling valve), which is provided with a measuring tube 4 to allow a certain amount of sample to be introduced. A switching valve 6 for backflushing (hereinafter referred to as a backflushing valve) is provided downstream of the sampling valve 2. A backflush column 8 is connected to the backflush valve 6, and gas from the sampling valve 2 is introduced into the backflush column 8 through the backflush valve 6.
バツクフラツシユバルブ６の出口には抵抗体１
０を経て検出器１２が接続されている。 A resistor 1 is placed at the outlet of the backflush valve 6.
Detector 12 is connected via 0.
この炭化水素分析装置において、バツクフラツ
シユバルブ６のバルブ位置を実線位置にしてサン
プリングを行なう。サンプリングはサンプリング
バルブ２のバルブ位置を実線位置にして計量管４
に試料ガスを流した後、サンプリングバルブ２を
破線位置に切り換えて計量管４中の試料ガスをキ
ヤリヤガスによりバツクフラツシユバルブ６の方
向へ流す。 In this hydrocarbon analyzer, sampling is performed with the backflush valve 6 positioned at the solid line position. For sampling, set the sampling valve 2 to the solid line position and insert the metering tube 4.
After the sample gas is caused to flow, the sampling valve 2 is switched to the position indicated by the broken line, and the sample gas in the metering tube 4 is caused to flow in the direction of the backflush valve 6 using the carrier gas.
バツクフラツシユバルブ６を経た試料ガスはバ
ツクフラツシユカラム８に入つて分離される。バ
ツクフラツシユカラム８から空気とメタンが溶出
してバツクフラツシユバルブ６及び抵抗体１０を
経て検出器１２で検出された後に、バツクフラツ
シユバルブ６を破線位置に切り換える。これによ
りバツクフラツシユカラム８のキヤリヤガスの流
れ方向が反転し、バツクフラツシユカラム８中に
残留していた非メタン炭化水素が全体量として溶
出し、バツクフラツシユバルブ６及び抵抗体１０
を経て検出器１２に導かれて検出される。 The sample gas that has passed through the backflush valve 6 enters the backflush column 8 and is separated. After air and methane are eluted from the backflush column 8, passed through the backflush valve 6 and the resistor 10, and detected by the detector 12, the backflush valve 6 is switched to the dashed line position. As a result, the flow direction of the carrier gas in the backflush column 8 is reversed, and the non-methane hydrocarbons remaining in the backflush column 8 are eluted as a whole, causing the backflush valve 6 and the resistor 10 to elute.
The light is guided to the detector 12 and detected.
抵抗体１０は、バツクフラツシユバルブ６を切
り換えるバツクフラツシユ動作時に大きな流量変
動が生じるので、その流量変動を柔らげるために
設けられている。 The resistor 10 is provided to soften the large flow rate fluctuations that occur during the backflush operation in which the backflush valve 6 is switched.
従来は、抵抗体１０として不活性な担体を充填
したカラムを使用されている。 Conventionally, a column filled with an inert carrier has been used as the resistor 10.
（考案が解決しようとする問題点）
抵抗体１０として充填カラムを使用した場合、
高沸点の炭化水素などをバツクフラツシユした
際、これらの高沸点成分が抵抗体１０で一部吸着
されてテーリングを示し、検出器の応答が小さく
なる問題がある。(Problem to be solved by the invention) When a packed column is used as the resistor 10,
When backflushing high boiling point hydrocarbons, etc., these high boiling point components are partially adsorbed by the resistor 10, causing tailing, which causes a problem in which the response of the detector becomes small.
例えば、抵抗体１０として石英粉末を充填した
カラムを使用した場合、第３図に示されるような
クロマトグラムが得られた。非メタン炭化水素
（図中のnon−CH4）のピークに大きなテーリン
グが現れ、ピーク高さが小さくなつている。な
お、図中、O2は酸素のピーク、CH4はメタンの
ピークである。また、バツクフラツシユ動作時の
ベースライン変動（図中Ａ）も大きい。 For example, when a column filled with quartz powder was used as the resistor 10, a chromatogram as shown in FIG. 3 was obtained. A large tailing appears in the peak of non-methane hydrocarbons (non-CH 4 in the figure), and the peak height becomes smaller. In addition, in the figure, O 2 is the peak of oxygen, and CH 4 is the peak of methane. Furthermore, the baseline fluctuation (A in the figure) during the backflush operation is also large.
本考案は、非メタン炭化水素をテーリングを少
なくして検出することのできる炭化水素分析装置
を提供することを目的とするものである。 An object of the present invention is to provide a hydrocarbon analyzer that can detect non-methane hydrocarbons with less tailing.
（問題点を解決するための手段）
本考案では抵抗体１０として溶融石英ガラスキ
ヤピラリを使用し、その溶融石英ガラスキヤピラ
リを金属パイプに収容し、かつその溶融石英ガラ
スキヤピラリの少なくとも一端をその金属パイプ
の端部から突出させ、その突出部を任意に切断し
て長さを調節可能にする。(Means for Solving the Problems) In the present invention, a fused silica glass capillary is used as the resistor 10, the fused silica glass capillary is housed in a metal pipe, and at least one end of the fused silica glass capillary is It protrudes from the end of the metal pipe, and the length can be adjusted by cutting the protruding part arbitrarily.
（作用）
溶融石英ガラスキヤピラリは充填カラムに比べ
高沸点の炭化水素などの吸着が少ないため、テー
リングが小さくなり、検出器の応答が大きくな
る。抵抗体１０の抵抗値を小さくするときは、金
属パイプの端部から突出している溶融石英ガラス
キヤピラリの一部又は全部を切断する。(Function) Compared to a packed column, a fused silica glass capillary adsorbs less hydrocarbons with a high boiling point, so tailing becomes smaller and the response of the detector becomes larger. When reducing the resistance value of the resistor 10, part or all of the fused silica glass capillary protruding from the end of the metal pipe is cut off.
（実施例）
本考案の一実施例の炭化水素分析装置の構成は
第２図で示されるものと全く同じである。(Example) The configuration of a hydrocarbon analyzer according to an example of the present invention is exactly the same as that shown in FIG.
本実施例では抵抗体１０として、第１図に示さ
れる溶融石英ガラスキヤピラリを用いる。 In this embodiment, a fused silica glass capillary shown in FIG. 1 is used as the resistor 10.
１４は溶融石英ガラスキヤピラリであり、金属
パイプにてなる鞘１６中に収納されている。溶融
石英ガラスキヤピラリ１４の一端はシール材１８
を介して接続金具２０，２２，２４により入口パ
イプ２６に気密を保つて接続され、他端はシール
材２８を介して接続金具３０，３２，３４により
出口パイプ３６に気密を保つて接続されている。
キヤピラリ１４の他端は出口パイプ３６に突出し
ている。キヤピラリ１１のその突出部分を手で折
るなどして切断することにより、キヤピラリ１４
の長さを調節することができる。 14 is a fused silica glass capillary, which is housed in a sheath 16 made of a metal pipe. One end of the fused silica glass capillary 14 is covered with a sealing material 18
The other end is airtightly connected to the inlet pipe 26 by connecting fittings 20, 22, and 24 through the sealing material 28, and the other end is airtightly connected to the outlet pipe 36 by connecting fittings 30, 32, and 34 via a sealing material 28. There is.
The other end of the capillary 14 projects into an outlet pipe 36. By cutting the protruding part of the capillary 11 by hand, etc., the capillary 14 is removed.
The length can be adjusted.
第４図に、第１図の抵抗体を用いて大気中の炭
化水素を分析した場合のクロマトグラムを示す。
非メタン炭化水素（non−CH4）の吸着によるテ
ーリングが減少し、検出感度の改善がなされてい
る。また、抵抗体１０の本来の目的であるバツク
フラツシユ動作時の検出器のベースライン変動
（図中Ｂ）も小さくなつている。 FIG. 4 shows a chromatogram when hydrocarbons in the atmosphere are analyzed using the resistor shown in FIG. 1.
Tailing due to adsorption of non-methane hydrocarbons (non-CH 4 ) is reduced, and detection sensitivity is improved. Furthermore, the baseline fluctuation (B in the figure) of the detector during backflash operation, which is the original purpose of the resistor 10, is also reduced.
（考案の効果）
本考案の炭化水素分析装置は、抵抗体１０とし
て溶融石英ガラスキヤピラリを使用したので、炭
素数12〜15程度の高沸点の炭化水素の抵抗体１０
での吸着を大幅に減少させて、鋭く、検出感度の
高いクロマトグラムを得ることができる。(Effects of the invention) Since the hydrocarbon analyzer of the present invention uses a fused silica glass capillary as the resistor 10, the resistor 10 is made of a high boiling point hydrocarbon having about 12 to 15 carbon atoms.
It is possible to significantly reduce the adsorption at
まらた、溶融石英ガラスキヤピラリを金属パイ
プに収容したので、溶融石英ガラスキヤピラリが
破損することなく安全に使用することができる。 Furthermore, since the fused silica glass capillary is housed in the metal pipe, the fused silica glass capillary can be used safely without being damaged.
さらに、その溶融石英ガラスキヤピラリの少な
くとも一端をその金属パイプの端部から突出させ
たので、その金属パイプから突出している溶融石
英ガラスキヤピラリを切断して長さを順次短くし
ていくことにより、抵抗の大きさを簡単に調節す
ることができる。 Furthermore, since at least one end of the fused silica glass capillary was made to protrude from the end of the metal pipe, by cutting the fused silica glass capillary protruding from the metal pipe to gradually shorten the length. , the magnitude of the resistance can be easily adjusted.
第１図は本考案の実施例において使用される抵
抗体を示す断面図、第２図は本考案が対象とする
炭化水素分析装置を示す概略図、第３図は従来の
炭化水素分析装置によるクロマトグラムを示す
図、第４図は本考案の一実施例の炭化水素分析装
置によるクロマトグラムを示す図である。
６……バツクフラツシユバルブ、８……バツク
フラツシユカラム、１０……抵抗体、１２……検
出器、１４……溶融石英ガラスキヤピラリ、１６
……金属パイプの鞘。
Fig. 1 is a cross-sectional view showing a resistor used in an embodiment of the present invention, Fig. 2 is a schematic diagram showing a hydrocarbon analysis device targeted by the present invention, and Fig. 3 is a conventional hydrocarbon analysis device. FIG. 4 is a diagram showing a chromatogram obtained by a hydrocarbon analyzer according to an embodiment of the present invention. 6... Backflash valve, 8... Backflash column, 10... Resistor, 12... Detector, 14... Fused silica glass capillary, 16
...Sheath of a metal pipe.
Claims (1)
の方向が反転されるバツクフラツシユカラムを備
え、このバツクフラツシユカラム内の試料成分を
前記切換えバルブから抵抗体を経て検出器に導く
ように構成されたガスクロマトグラフイ分離によ
る炭化水素分析装置において、前記抵抗体として
溶融石英ガラスキヤピラリを用い、その溶融石英
ガラスキヤピラリを金属パイプに収容し、かつそ
の溶融石英ガラスキヤピラリの少なくとも一端を
その金属パイプの端部から突出させ、その突出部
を任意に切断して長さを調節可能にしたことを特
徴とする炭化水素分析装置。 A gas chromatograph comprising a backflash column whose flow direction is reversed by a backflash switching valve, and configured to guide sample components in the backflash column from the switching valve to a detector via a resistor. In an apparatus for analyzing hydrocarbons by separation, a fused silica glass capillary is used as the resistor, the fused silica glass capillary is housed in a metal pipe, and at least one end of the fused silica glass capillary is connected to an end of the metal pipe. 1. A hydrocarbon analysis device, characterized in that the length of the hydrocarbon analysis device can be adjusted by protruding from the top and cutting the protruding portion arbitrarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986048793U JPH0530134Y2 (en) | 1986-03-31 | 1986-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986048793U JPH0530134Y2 (en) | 1986-03-31 | 1986-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62160366U JPS62160366U (en) | 1987-10-12 |
| JPH0530134Y2 true JPH0530134Y2 (en) | 1993-08-02 |
Family
ID=30870656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986048793U Expired - Lifetime JPH0530134Y2 (en) | 1986-03-31 | 1986-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530134Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55144544A (en) * | 1979-04-27 | 1980-11-11 | Yokogawa Hewlett Packard Ltd | Silica column for chromatograph |
-
1986
- 1986-03-31 JP JP1986048793U patent/JPH0530134Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55144544A (en) * | 1979-04-27 | 1980-11-11 | Yokogawa Hewlett Packard Ltd | Silica column for chromatograph |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62160366U (en) | 1987-10-12 |
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