JPH0434447Y2 - - Google Patents
Info
- Publication number
- JPH0434447Y2 JPH0434447Y2 JP20230785U JP20230785U JPH0434447Y2 JP H0434447 Y2 JPH0434447 Y2 JP H0434447Y2 JP 20230785 U JP20230785 U JP 20230785U JP 20230785 U JP20230785 U JP 20230785U JP H0434447 Y2 JPH0434447 Y2 JP H0434447Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- analysis
- fid
- tank
- automatic
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はFID（水素炎イオン化デイテクタ）を
備えた自動ガスクロマトグラフに関し、特にタン
ク付きのエア・コンプレツサから助燃用空気の供
給を受けるFIDと、自動ゼロ点補正機構とを備
え、プログラムに従つて自動的、かつ周期的に分
析を行なう自動ガスクロマトグラフに関するもの
である。[Detailed description of the invention] (Industrial application field) The present invention relates to an automatic gas chromatograph equipped with an FID (Flame Ionization Detector), and in particular an FID that receives auxiliary combustion air from an air compressor with a tank. The present invention relates to an automatic gas chromatograph that is equipped with an automatic zero point correction mechanism and that performs analysis automatically and periodically according to a program.
このような自動ガスクロマトグラフは、例えば
大気中の炭化水素濃度などを測定するのに使用さ
れている。 Such automatic gas chromatographs are used, for example, to measure hydrocarbon concentrations in the atmosphere.
（従来の技術）
FIDの１つの問題点は、周辺大気を圧縮して供
給している助燃用空気中に含まれている炭化水素
濃度の変動によつて、バツクグラウンドが変化
し、ベースラインにノイズやドリフトを生じるこ
とである。(Conventional technology) One problem with FID is that the background changes due to fluctuations in the concentration of hydrocarbons contained in the auxiliary combustion air, which is supplied by compressing the surrounding atmosphere. This causes noise and drift.
この対策としては、助燃用空気中の炭化水素を
浄化装置によつて除去することが実用化されてい
る。（特公昭53−22477号公報参照）。 As a countermeasure against this problem, it has been put into practical use to remove hydrocarbons from the auxiliary combustion air using a purification device. (Refer to Special Publication No. 53-22477).
（考案が解決しようとする問題点）
浄化装置を用いるFIDには次のような問題点が
ある。(Problems that the invention attempts to solve) FID using a purification device has the following problems.
(1) 浄化装置には高温を必要とする。すなわち、
空気を直接加熱する場合は1000℃程度に加熱す
る必要があり、また、触媒を使用したとしても
400℃程度に加熱する必要がある。そのため、
安全上の問題があるとともに、電力消費が大き
くなる問題もある。(1) Purification equipment requires high temperatures. That is,
When heating air directly, it is necessary to heat it to about 1000℃, and even if a catalyst is used,
It is necessary to heat it to about 400℃. Therefore,
In addition to safety issues, there is also the issue of increased power consumption.
(2) 浄化装置の浄化性能を維持するためには、触
媒の交換などの保守管理に手間がかかる。(2) In order to maintain the purification performance of the purification device, maintenance such as replacing the catalyst is time-consuming.
本考案は、上記のような安全性、コスト、保守
管理などの面で問題のある浄化装置を使用せず、
しかも助燃用空気中の有機物の影響を受けにくく
した自動ガスクロマトグラフを提供することを目
的とするものである。 This invention does not use purification equipment that has problems in terms of safety, cost, maintenance management, etc., as described above.
Moreover, it is an object of the present invention to provide an automatic gas chromatograph that is less susceptible to the influence of organic matter in the combustion-assisting air.
（問題点を解決するための手段）
本考案の自動ガスクロマトグラフは、タンク付
きのエア・コンプレツサから助燃用空気の供給を
受けるFIDと、自動ゼロ点補正機構とを備え、プ
ログラムに従つて自動的、かつ周期的に分析を行
なう自動ガスクロマトグラフであつて、分析開始
前に前記タンクに圧縮空気を補給し、分析中は圧
縮空気の補給を停止するように、前記プログラム
により、分析周期に同期して前記エア・コンプレ
ツサの電源回路を断続するようにしたものであ
る。(Means for Solving the Problems) The automatic gas chromatograph of the present invention is equipped with an FID that receives air for auxiliary combustion from an air compressor with a tank, and an automatic zero point correction mechanism. , and is an automatic gas chromatograph that periodically performs analysis, and is synchronized with the analysis cycle according to the program so that compressed air is supplied to the tank before the analysis starts, and the supply of compressed air is stopped during the analysis. The power supply circuit of the air compressor is connected intermittently.
（実施例） 図は本考案の一実施例を表わす。(Example) The figure represents an embodiment of the invention.
１はサンプルバルブであり、プログラマ６の指
示によりサンプルガスＳ又はキヤリヤガスＣを切
り換えてカラム２に供給する。３はカラム２から
の溶出成分を検出するFIDであり、水素Ｈとエア
タンク１０からの助燃用空気が供給される。サン
プルバルブ１、カラム２及びFID３はオーブン４
内に収容されている。 Reference numeral 1 denotes a sample valve, which switches between sample gas S and carrier gas C and supplies the sample gas S or carrier gas C to the column 2 according to instructions from the programmer 6. 3 is an FID for detecting the eluted components from the column 2, and is supplied with hydrogen H and auxiliary combustion air from the air tank 10. Sample valve 1, column 2 and FID 3 are in oven 4
is housed within.
５は自動ゼロ点補正機能を備えた増幅器であ
り、FID３の検出出力を増幅し、その増幅された
出力信号はデータ処理装置７へ送出される。 Reference numeral 5 denotes an amplifier equipped with an automatic zero point correction function, which amplifies the detection output of the FID 3 and sends the amplified output signal to the data processing device 7.
８はエア・コンプレツサであり、空気Ａを圧縮
してエアタンク１０へ補給するコンプレツサ本体
９、エアタンク１０及びエアタンク１０内の圧力
を検出してエア・コンプレツサ用電源Ｅを開閉す
る圧力スイツチ１１からなつている。 Reference numeral 8 denotes an air compressor, which consists of a compressor main body 9 that compresses air A and supplies it to an air tank 10, an air tank 10, and a pressure switch 11 that detects the pressure inside the air tank 10 and opens and closes a power source E for the air compressor. There is.
１２は圧力スイツチ１１と直列に設けられたリ
レー接点であり、プログラム６によつて開閉制御
される。リレー接点１２は分析終了後、次の分析
開始までの間に閉じるようにプログラムされ、リ
レー接点１２が閉じた直後に増幅器５の自動ゼロ
点補正機能が作動するように設定されている。 12 is a relay contact provided in series with the pressure switch 11, and its opening and closing are controlled by the program 6. The relay contact 12 is programmed to close between the end of analysis and the start of the next analysis, and the automatic zero point correction function of the amplifier 5 is set to operate immediately after the relay contact 12 closes.
なお、従来の自動ガスクロマトグラフではリレ
ー接点１２は設けられておらず、エアタンク１０
からFID３への助燃用空気供給経路に助燃用空気
浄化装置１３が設けられている。 Note that the conventional automatic gas chromatograph is not provided with the relay contact 12, and the air tank 10 is not provided with the relay contact 12.
An auxiliary combustion air purifying device 13 is provided in the auxiliary combustion air supply path from the FID 3 to the FID 3.
本実施例において、分析終了後にコンプレツサ
本体９が作動してエアタンク１０に圧縮空気を補
給する。この結果、エアタンク１０に濃度の異な
る空気が加わるので、エアタンク１０内の炭化水
素濃度が変わり、FID３のバツクグラウンドが変
わり、ベースラインが移動する。これを増幅器５
の自動ゼロ点補正機能によつて０に引き戻し、そ
の後、次の分析を開始する。分析中はコンプレツ
サ本体９は作動しないから、助燃用空気中の炭化
水素濃度の変動に起因するドリフトは生じない。 In this embodiment, after the analysis is completed, the compressor main body 9 operates to replenish the air tank 10 with compressed air. As a result, air with different concentrations is added to the air tank 10, so the hydrocarbon concentration in the air tank 10 changes, the background of the FID 3 changes, and the baseline moves. Add this to amplifier 5
It is pulled back to 0 by the automatic zero point correction function, and then the next analysis is started. Since the compressor main body 9 does not operate during analysis, no drift occurs due to fluctuations in the hydrocarbon concentration in the auxiliary combustion air.
エアタンク１０は少なくとも１分析周期の間、
FID３に助燃用空気を供給できるだけの容量が必
要である。実際の数値例をあげるとエアタンクの
容積10、エアタンク１０の最大圧（圧力スイツ
チ１１の上限値）を４Kg／cm2、助燃用空気供給の
ための必要最小圧を２Kg／cm2とすると、１分析で
最大20Nの空気を利用できる。FID３が必要と
する助燃用空気の流量を600ml／分とすれば、約
30分間の分析が可能である。 The air tank 10 is used for at least one analysis cycle.
A capacity sufficient to supply auxiliary combustion air to FID3 is required. To give an example of actual numerical values, if the volume of the air tank is 10, the maximum pressure of the air tank 10 (the upper limit of the pressure switch 11) is 4Kg/cm 2 , and the minimum pressure required to supply air for auxiliary combustion is 2Kg/cm 2 , then 1 Up to 20N of air can be used for analysis. If the flow rate of auxiliary combustion air required by FID3 is 600ml/min, approximately
Analysis can be performed for 30 minutes.
リレー１２の動作タイミングは正確に設定する
必要はなく、少し長めに設定しておけばよい。エ
アタンク１０の圧力が上限に達すれば、圧力スイ
ツチ１１によつてコンプレツサ本体９の電源Ｅは
切断される。 The operation timing of the relay 12 does not need to be set accurately, and may be set a little longer. When the pressure in the air tank 10 reaches its upper limit, the pressure switch 11 turns off the power source E of the compressor body 9.
（考案の効果）
本考案によれば、助燃用空気を供給するエアコ
ンプレツサの作動と分析とを同期させることによ
り、助燃用空気中の炭化水素濃度の変動が分析に
悪影響を及ぼすことを防止するので、種々問題の
多い空気浄化装置を使わずに自動ガスクロマトグ
ラフを実現することができる。(Effects of the invention) According to the invention, by synchronizing the operation of the air compressor that supplies air for auxiliary combustion with analysis, fluctuations in the concentration of hydrocarbons in the air for auxiliary combustion can be prevented from adversely affecting analysis. Therefore, it is possible to realize an automatic gas chromatograph without using an air purification device, which has many problems.
図は本考案の一実施例を示す概略図である。
２……カラム、３……FID、５……自動ゼロ点
補正機構を備えた増幅器、６……プログラマ、８
……エアコンプレツサ、１０……エア・タンク、
１２……リレー接点。
The figure is a schematic diagram showing an embodiment of the present invention. 2...Column, 3...FID, 5...Amplifier with automatic zero point correction mechanism, 6...Programmer, 8
...Air compressor, 10...Air tank,
12...Relay contact.
Claims (1)
気の供給を受けるFIDと、自動ゼロ点補正機構と
を備えて、プログラムに従つて自動的、かつ周期
的に分析を行なう自動ガスクロマトグラフにおい
て、 分析開始前に前記タンクに圧縮空気を補給し、
分析中は圧縮空気の補給を停止するように、前記
プログラムにより分析周期に同期して前記エア・
コンプレツサの電源回路を断続することを特徴と
する自動ガスクロマトグラフ。[Claims for Utility Model Registration] An automatic system that is equipped with an FID that receives auxiliary combustion air from an air compressor with a tank and an automatic zero point correction mechanism, and that performs analysis automatically and periodically according to a program. In a gas chromatograph, compressed air is supplied to the tank before the start of analysis,
The program causes the air supply to be stopped in synchronization with the analysis cycle so that the supply of compressed air is stopped during the analysis.
An automatic gas chromatograph characterized by an intermittent power supply circuit for the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20230785U JPH0434447Y2 (en) | 1985-12-25 | 1985-12-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20230785U JPH0434447Y2 (en) | 1985-12-25 | 1985-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62115172U JPS62115172U (en) | 1987-07-22 |
| JPH0434447Y2 true JPH0434447Y2 (en) | 1992-08-17 |
Family
ID=31166561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20230785U Expired JPH0434447Y2 (en) | 1985-12-25 | 1985-12-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434447Y2 (en) |
-
1985
- 1985-12-25 JP JP20230785U patent/JPH0434447Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62115172U (en) | 1987-07-22 |
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