JPH0336917Y2 - - Google Patents
Info
- Publication number
- JPH0336917Y2 JPH0336917Y2 JP19236085U JP19236085U JPH0336917Y2 JP H0336917 Y2 JPH0336917 Y2 JP H0336917Y2 JP 19236085 U JP19236085 U JP 19236085U JP 19236085 U JP19236085 U JP 19236085U JP H0336917 Y2 JPH0336917 Y2 JP H0336917Y2
- Authority
- JP
- Japan
- Prior art keywords
- flow cell
- gas
- holes
- sliding body
- hole
- 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
- 239000007789 gas Substances 0.000 claims description 46
- 238000004611 spectroscopical analysis Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 16
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Landscapes
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【考案の詳細な説明】
イ 産業上の利用分野
本考案は、ガスクロマトグラフから流出した試
料成分をフーリエ変換型赤外分光光度計によつて
分析する分析手法（GC−FTIR）等に用いるガ
スフローセル装置に関する。[Detailed explanation of the invention] A. Field of industrial application This invention is a gas flow cell used in analytical methods such as GC-FTIR, in which sample components flowing out from a gas chromatograph are analyzed using a Fourier transform infrared spectrophotometer. Regarding equipment.
ロ 従来の技術
GC−FTIRの測定において、従来はガスクロ
マトグラフから出てきた流出ガスを、FTIR（フ
ーリエ変換型赤外分光光度計）の試料室内のフロ
ーセルに導入し、リアルタイムで測定する方式が
一般的であるが、測定時間が少なくて十分な積算
効果が得られず、試料成分が微量の場合、真のデ
ータがノイズの中に埋もれてしまい、十分な分析
感度が得られないという問題点があつた。B. Conventional technology In GC-FTIR measurements, the conventional method was to introduce the outflow gas from a gas chromatograph into a flow cell in the sample chamber of an FTIR (Fourier transform infrared spectrophotometer) and measure it in real time. However, the problem is that the measurement time is short and sufficient integration effect cannot be obtained, and if the sample components are in trace amounts, the true data is buried in noise, making it impossible to obtain sufficient analysis sensitivity. It was hot.
ハ 考案が解決しようとする問題点
本考案は、従来のGC−FTIRの測定において、
分析感度が低いという問題点を解消するのを目的
とする。C. Problems that the invention aims to solve The invention solves the following problems in conventional GC-FTIR measurements.
The purpose is to solve the problem of low analytical sensitivity.
ニ 問題点解決するための手段
フローセルを用いたGC−FTIR装置において、
軸と平行に複数個の孔（フローセル用貫通孔）を
穿設した摺動体、同摺動体の両端面に摺接して上
記複数個の貫通孔の両端を閉塞している側板より
なるガス保持装置において、上記貫通孔の通過軌
跡上に臨み、上記両側板において互いに対向する
位置に、一対の光入射窓、光出射窓及び一対のガ
ス流入孔、ガス流出孔を設けた分光分析用フロー
セル装置。D. Means for solving problems In a GC-FTIR device using a flow cell,
A gas retention device consisting of a sliding body with a plurality of holes (flow cell through holes) drilled in parallel with the axis, and a side plate that slides on both end surfaces of the sliding body and closes both ends of the plurality of through holes. A flow cell device for spectroscopic analysis, wherein a pair of light entrance windows, a light exit window, and a pair of gas inflow holes and gas outflow holes are provided at mutually opposing positions on the both side plates facing on the path of passage of the through hole.
更に、上記摺動体に駆動装置を連結し、ガス検
出器でガスが検出されたことを検知し、その検知
時間より適宜時間遅延して、摺動体のフローセル
が順次所定の位置に保持されるように、駆動装置
を駆動させることにより、順次指定されたガスを
別々のフローセル用貫通孔に保持させる制御装置
を設けたことを特徴とする分光分析用フローセル
装置。 Furthermore, a drive device is connected to the sliding body, so that the gas detector detects the detection of gas, and the flow cells of the sliding body are sequentially held at predetermined positions with an appropriate time delay from the detection time. A flow cell device for spectroscopic analysis, further comprising a control device that sequentially holds specified gases in separate flow cell through-holes by driving a drive device.
ホ 作用
本考案によれば、測定ガス成分をフローセル内
に保持しておいて、任意時期に任意に時間をかけ
て測定することができるので、フーリエ変換赤外
分光分析測定の特徴である積算効果が生かされ
て、測定ガス成分が微量でもＳ／Ｎ比の良い測定
データを入手することが出来て、ガスクロマトグ
ラフ流出ガス等時間的に変化する試料の分析を、
感度を落とさずに行うことが可能になつた。E. Effect According to the present invention, the gas components to be measured can be held in the flow cell and measured at any time and over an arbitrary period of time. By taking advantage of this, it is possible to obtain measurement data with a good S/N ratio even if the measured gas components are minute, making it possible to analyze samples that change over time, such as gas chromatograph effluent gas.
It is now possible to do this without reducing sensitivity.
更に、駆動装置を使つてCPUにより順次摺動
体を摺動させて、フローセルに測定ガス成分を保
持したり、フローセル内のガスを順次測定するこ
とを自動的に行わせることによつて、測定能率が
向上する。 Furthermore, measurement efficiency can be improved by automatically holding the measuring gas components in the flow cell and sequentially measuring the gas in the flow cell by sequentially sliding the sliding body by the CPU using a drive device. will improve.
ヘ 実施例
第１図は本考案の一実施例の縦断側面図であ
る。第１図において、１は回転部で回転軸１ｂ
（第２図）を両端面に突出させた円柱であり、こ
の円柱と同心の一円周上に軸と平行に孔（フロー
セル用貫通孔）１ａが数個貫通していて回転部を
構成している。２は固定台で両端に互いに対向す
る一対の側板３，３′を有する。両方の側板３，
３′は回転部１の両端面に摺接しており、中央に
回転軸１ｂに適合した孔を設け、同孔に回転部１
の回転軸１ｂを挿入させて、回転部を回転可能に
保持している。回転部１に設けられたフローセル
１ａの一つが図で上部位置に来た時に合致するよ
うに、光出射孔１３と光入射孔１２を両方の側板
３，３′の上部に、フローセル１ａの軸方向と平
行に貫通させて設け、側板３，３′の上面から出
射孔１３及び入射孔１２の中央部に向けて孔を貫
通させて、同孔にパイプ１５及びパイプ１４を接
続させる。側板３は固定台２と一体的であり、他
方３′は固定台２に回転方向には固定され、軸方
向には摺動可能に複数本のピン１９によつて係合
されている。４はバネで回転軸１ｂに嵌合され、
５はバネ止めで回転部１の回転軸１ｂの端に螺着
され、バネ４を圧縮して回転部１を側板３の方へ
引付け、回転部１の端面を側板３に圧接させてい
る。６はバネでバネ４と同じように右側の側板
３′を回転部１に圧接させる。７はバネ止めピン
で回転軸１ｂに差し込まれている。８は窓板で右
側側板３′に設けられた入射孔１２を外気から遮
断する通光性の板、９も窓板で左側側板３に設け
られた出射孔１３を外気から遮断する通光性の
板、１０はパイプ１４の入射孔１２の近くに設置
された電磁弁、１１はパイプ１５の出射孔１３の
近くに設置された電磁弁である。１６はパルスモ
ーターでCPU２１からの駆動信号より回転部１
を回転させる。１７はフーリエ変換赤外分光器、
１８は光検出器、２０は回転軸１ｂとパルスモー
ター１６の軸とを連結させる継手、２１はCPU
でガスクロマトグラフ検出器２２の検出データを
記憶すると共に検出データに基づき、パルスモー
ター１６に駆動信号を送ると共に検出器１８の検
出出力も記憶し、データ処理を行う。ガスクロマ
トグラフ検出器２２は、ガスクロマトグラフから
流出する試料成分を検出するものである。F. Embodiment FIG. 1 is a longitudinal sectional side view of an embodiment of the present invention. In Fig. 1, 1 is a rotating part with a rotating shaft 1b.
(Fig. 2) is a cylinder with protrusions on both end faces, and several holes (through-holes for flow cell) 1a are penetrated on one circumference concentric with this cylinder in parallel to the axis, forming a rotating part. ing. Reference numeral 2 denotes a fixed base having a pair of side plates 3, 3' facing each other at both ends. both side plates 3,
3' is in sliding contact with both end surfaces of the rotating part 1, and a hole that fits the rotating shaft 1b is provided in the center, and the rotating part 1 is inserted into the hole.
The rotating shaft 1b is inserted to rotatably hold the rotating part. The light exit hole 13 and the light entrance hole 12 are placed at the top of both side plates 3 and 3', and the axis of the flow cell 1a is aligned so that they coincide when one of the flow cells 1a provided in the rotating part 1 is at the upper position in the figure. A hole is passed through the side plate 3, 3' from the upper surface of the side plate 3, 3' toward the center of the emission hole 13 and the entrance hole 12, and the pipe 15 and the pipe 14 are connected to the hole. The side plate 3 is integral with the fixed base 2, and the other side plate 3' is fixed to the fixed base 2 in the rotational direction and slidably engaged in the axial direction by a plurality of pins 19. 4 is fitted to the rotating shaft 1b with a spring,
5 is screwed onto the end of the rotating shaft 1b of the rotating part 1 with a spring stopper, compressing the spring 4 to draw the rotating part 1 toward the side plate 3, and press the end surface of the rotating part 1 against the side plate 3. . A spring 6 presses the right side plate 3' against the rotating part 1 in the same way as the spring 4. Reference numeral 7 is a spring lock pin inserted into the rotating shaft 1b. Reference numeral 8 denotes a window plate, which is a light-permeable plate that blocks the entrance hole 12 provided in the right-hand side plate 3' from the outside air, and 9 also refers to a window plate, which has a light-permeable property that blocks the exit hole 13 provided in the left-hand side plate 3 from the outside air. 10 is a solenoid valve installed near the entrance hole 12 of the pipe 14, and 11 is a solenoid valve installed near the exit hole 13 of the pipe 15. 16 is a pulse motor that rotates the rotating part 1 based on the drive signal from the CPU 21.
Rotate. 17 is a Fourier transform infrared spectrometer;
18 is a photodetector, 20 is a joint that connects the rotating shaft 1b and the shaft of the pulse motor 16, and 21 is a CPU.
Detection data of the gas chromatograph detector 22 is stored, and based on the detection data, a drive signal is sent to the pulse motor 16, and the detection output of the detector 18 is also stored, and data processing is performed. The gas chromatograph detector 22 detects sample components flowing out from the gas chromatograph.
次に測定方法を説明する。電磁弁１０，１１は
通常開いており、ガスクロマトグラフ（不図示）
からパイプ１４を通つてカラム流出ガスが回転部
１の一番上の位置にあるフローセル１ａに流入し
パイプ１５を通つて出て行く。フローセル１ａは
フーリエ変換赤外分光器１７と検出器１８の間の
光軸上に位置され、フローセル１ａ内に流入した
ガスを測定できるように配置されている。フロー
セル１ａ内とガスクロマトグラフとの間に挿入さ
れたガスクロマトグラフ検出器２２が試料成分の
ピークを検出するとそのデータをCPU２１に移
送する。CPU２１はこのピーク検出信号が測定
前に予め指定された順位のピークに相当するもの
であるか否か判別し、指定されているピークと判
別した場合、一定の遅れ時間の後、駆動信号を発
生させてパルスモーター１６により回転部１をフ
ローセルの１ピツチ分だけ回転させて、フローセ
ル１ａ内に指定された試料成分ガスを閉じ込め、
次のフローセル１ａを光入出射孔１２，１３に合
致させる。上記した一定の遅れ時間はガスクロマ
トグラフ検出器２２の検出出力のピーク頂上が検
出された時からスタートし、そのピーク頂上がフ
ローセル１ａの中央に来る迄の時間に設定され
る。このようにして順次フローセル１ａ内に指定
された試料成分ガスを閉じ込める。ガスをフロー
セル１ａ内に閉じ込め終わると、電磁弁１０，１
１を閉じ、回転部１を回転させて、測定するガス
を閉じ込めたフローセル１ａを順次光入出射孔１
２，１３と合致させて、フローセル１ａ内のガス
を順次測定する。一つのフローセルについて測定
が終わつて、次のフローセルに切り換える時、入
出射孔１２，１３内には前のガスが残つているの
で、切り換え前に電磁弁１０，１１を開き、パー
ジガスを流して残留ガスを追い出し、その後電磁
弁１０，１１を閉じて次のフローセルを測定位置
に持つて来る。フローセル１ａ内のガスは漏れな
いので任意時間をかけて測定が可能になり、フー
リエ変換赤外分光測定の特徴である積算測定が行
える。 Next, the measurement method will be explained. The solenoid valves 10 and 11 are normally open, and the gas chromatograph (not shown)
The column effluent gas flows from the column through the pipe 14 into the flow cell 1a located at the top of the rotating section 1, and exits through the pipe 15. The flow cell 1a is located on the optical axis between the Fourier transform infrared spectrometer 17 and the detector 18, and is arranged so that gas flowing into the flow cell 1a can be measured. When the gas chromatograph detector 22 inserted between the flow cell 1a and the gas chromatograph detects a peak of a sample component, the data is transferred to the CPU 21. The CPU 21 determines whether or not this peak detection signal corresponds to a peak in a pre-designated order before measurement, and if determined to be a designated peak, generates a drive signal after a certain delay time. Then, the rotating part 1 is rotated by one pitch of the flow cell by the pulse motor 16 to confine the specified sample component gas in the flow cell 1a.
The next flow cell 1a is aligned with the light input/output holes 12 and 13. The above-mentioned fixed delay time starts from when the top of the peak of the detection output of the gas chromatograph detector 22 is detected and is set to the time until the top of the peak reaches the center of the flow cell 1a. In this way, designated sample component gases are sequentially confined within the flow cell 1a. When the gas is completely confined within the flow cell 1a, the solenoid valves 10, 1
1 is closed, the rotating part 1 is rotated, and the flow cell 1a containing the gas to be measured is sequentially opened through the light entrance/exit hole 1.
2 and 13, and sequentially measure the gas in the flow cell 1a. When switching to the next flow cell after measurement has been completed for one flow cell, the previous gas remains in the inlet/output holes 12 and 13, so before switching, open the solenoid valves 10 and 11 and let the purge gas flow to remove the remaining gas. After expelling the gas, the solenoid valves 10 and 11 are closed and the next flow cell is brought to the measurement position. Since the gas in the flow cell 1a does not leak, measurement can be performed over an arbitrary period of time, and integrated measurement, which is a characteristic of Fourier transform infrared spectroscopy, can be performed.
本実施例では、フローセルを加熱する装置が付
加されてないが、実際問題としては試料成分が高
沸点の場合は、フローセル部はガスクロマトグラ
フと同程度、例えば250℃程度加熱しておく必要
がある。又、フローセル内面における赤外線の吸
収損失を少なくするために、フローセルの内面に
金蒸着を行うことが望ましい。 In this example, a device to heat the flow cell is not added, but as a practical matter, if the sample component has a high boiling point, the flow cell section needs to be heated to the same degree as a gas chromatograph, for example around 250 degrees Celsius. . Furthermore, in order to reduce absorption loss of infrared rays on the inner surface of the flow cell, it is desirable to deposit gold on the inner surface of the flow cell.
本実施例では、フローセルの位置を、ガス取込
み時と測定時とにおいて同じ位置で使用している
が、測定する位置を取込みする位置と違えても同
じ効果が期待できる。 In this embodiment, the flow cell is used at the same position during gas intake and measurement, but the same effect can be expected even if the measurement position is different from the intake position.
又、摺動体を本実施例では回転部１としている
が、スライド式でも同じ効果が期待できる。 Further, although the sliding body is the rotating part 1 in this embodiment, the same effect can be expected with a sliding type.
ト 効果
(1) 本考案によれば、測定ガス成分をフローセル
に保持してから測定するようにしたので、フー
リエ変換赤外分光分析測定の特徴である積算効
果が生かされて感度が上昇でき、測定ガス成分
が微量でも測定精度が落ちることなく測定が可
能になつた。G. Effect (1) According to the present invention, since the measurement gas components are held in the flow cell before being measured, the integration effect, which is a characteristic of Fourier transform infrared spectroscopy measurement, can be utilized to increase the sensitivity. It is now possible to measure even trace amounts of gas components without reducing measurement accuracy.
(2) 更に、駆動装置を使つてCPUにより順次回
転部を回転させて、フローセルに測定ガス成分
を保持したり、フローセル内のガスを順次測定
することを自動的に行えるようにしたことで、
分析能率が向上した。(2) Furthermore, by using a drive device to sequentially rotate the rotating parts by the CPU, it is possible to automatically hold measurement gas components in the flow cell and sequentially measure the gas in the flow cell.
Analysis efficiency has improved.
第１図は、本考案の一実施例の縦断側面図であ
る。第２図は、回転部の斜視図である。
FIG. 1 is a longitudinal sectional side view of an embodiment of the present invention. FIG. 2 is a perspective view of the rotating section.
Claims (1)
た摺動体と、この摺動体の両端面に摺接して上
記複数の貫通孔の両端を閉塞している側板とよ
りなり、上記両側板において、上記フローセル
用貫通孔の通過軌跡に臨み、互いに対向する位
置に一対の光入射窓及び光出射窓を設け、上記
両側板において、上記フローセル用貫通孔の通
過軌跡に臨み、互いに対向する位置に一対のガ
ス流入孔及びガス流出孔を設けた分光分析用フ
ローセル装置。 (2) 実用新案登録請求の範囲１の項において、ガ
ス検出器で試料ガスが検出されたことを検知す
ることにより、摺動体を駆動し、順次指定され
た試料ガスを別々のフローセル用貫通孔に保持
させる制御手段を設けたことを特徴とする分光
分析用フローセル装置。[Claims for Utility Model Registration] (1) A sliding body in which a plurality of flow cell through-holes are bored in parallel, and a sliding body that slides into both end faces of the sliding body to close both ends of the plurality of through-holes. A pair of light entrance windows and a light exit window are provided on the both side plates at positions facing each other and facing the passage path of the flow cell through hole, and on the both side plates, a pair of light entrance windows and a light output window are provided at positions facing the passage path of the flow cell through hole. A flow cell device for spectroscopic analysis that has a pair of gas inflow holes and gas outflow holes facing each other in positions facing the trajectory. (2) In claim 1 of the utility model registration, by detecting that a sample gas is detected by a gas detector, the sliding body is driven and the specified sample gases are sequentially transferred to separate flow cell through-holes. 1. A flow cell device for spectroscopic analysis, characterized in that it is provided with a control means for maintaining the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19236085U JPH0336917Y2 (en) | 1985-12-13 | 1985-12-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19236085U JPH0336917Y2 (en) | 1985-12-13 | 1985-12-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62115143U JPS62115143U (en) | 1987-07-22 |
| JPH0336917Y2 true JPH0336917Y2 (en) | 1991-08-05 |
Family
ID=31147366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19236085U Expired JPH0336917Y2 (en) | 1985-12-13 | 1985-12-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0336917Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2940429A1 (en) * | 2014-03-17 | 2015-09-24 | Prism Analytical Technologies, Inc. | Process and system for rapid sample analysis |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033390U (en) * | 1983-08-12 | 1985-03-07 | 株式会社川村電光舎 | Signal light blinking control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5974360U (en) * | 1982-11-11 | 1984-05-19 | 昭和電工株式会社 | Liquid chromatograph detection device |
-
1985
- 1985-12-13 JP JP19236085U patent/JPH0336917Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033390U (en) * | 1983-08-12 | 1985-03-07 | 株式会社川村電光舎 | Signal light blinking control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62115143U (en) | 1987-07-22 |
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