JP2606921Y2 - SO2 analyzer using ultraviolet absorption method - Google Patents
SO2 analyzer using ultraviolet absorption methodInfo
- Publication number
- JP2606921Y2 JP2606921Y2 JP1993033710U JP3371093U JP2606921Y2 JP 2606921 Y2 JP2606921 Y2 JP 2606921Y2 JP 1993033710 U JP1993033710 U JP 1993033710U JP 3371093 U JP3371093 U JP 3371093U JP 2606921 Y2 JP2606921 Y2 JP 2606921Y2
- Authority
- JP
- Japan
- Prior art keywords
- ultraviolet absorption
- analyzer
- sample gas
- absorption method
- gas line
- 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
Description
【０００１】[0001]
【産業上の利用分野】本考案は、例えば大気中のＳＯ2
の濃度を測定するための紫外線吸収法を用いたＳＯ2 分
析装置に関する。The present invention relates to, for example, SO 2 in the atmosphere.
The present invention relates to an SO 2 analyzer using an ultraviolet absorption method for measuring the concentration of methane.
【０００２】[0002]
【従来の技術】紫外線吸収法を用いてＳＯ2 の濃度を測
定するＳＯ2 分析装置では、従来、例えば図３に示すよ
うに、光源としてキセノン光源ａを用い、かつサンプル
ガスを導入するセルｂと光電素子ｃとの間に光学フィル
タｄを配置し、波長２８０〜３００nmの紫外線吸収帯を
取り出し、これをセルｂに照射していた。2. Description of the Related Art In a SO 2 analyzer for measuring the concentration of SO 2 using an ultraviolet absorption method, conventionally, for example, as shown in FIG. 3, a cell b in which a xenon light source a is used as a light source and a sample gas is introduced. An optical filter d was arranged between the cell and the photoelectric element c, an ultraviolet absorption band having a wavelength of 280 to 300 nm was extracted, and this was irradiated to the cell b.
【０００３】[0003]
【考案が解決しようとする課題】しかるに、ＳＯ2 の紫
外線吸収帯は２５０〜３３０nmであって、上述のセルｂ
に照射される光の波長よりも広いため、従来のＳＯ2 分
析装置では高感度なＳＯ2 の測定はできなかった。However, the ultraviolet absorption band of SO 2 is 250 to 330 nm, and the above-mentioned cell b
Since the wavelength is wider than the wavelength of the light irradiated on the surface, the conventional SO 2 analyzer could not measure SO 2 with high sensitivity.
【０００４】本考案はこのような実情に鑑みてなされ、
高感度にＳＯ2 を測定することができる紫外線吸収法を
用いたＳＯ2 分析装置を提供することを目的としてい
る。The present invention has been made in view of such circumstances.
It is an object of the present invention to provide an SO 2 analyzer using an ultraviolet absorption method capable of measuring SO 2 with high sensitivity.
【０００５】[0005]
【課題を解決するための手段】本考案は上述の課題を解
決するための手段を以下のように構成している。すなわ
ち、紫外線吸収法を用いてＳＯ2 の濃度を測定するＳＯ
2 分析装置において、紫外線照射光源として、ＳＯ2 の
紫外線吸収帯と合致した発光特性を有する螢光材料を表
面に塗着した螢光体付水銀ランプを用い、かつ流路切換
手段を介してサンプルガスラインと比較ガスラインとに
接続されるセルにサンプルガスと比較ガスとを一定周期
かつ一定量交互に導入するとともに、前記サンプルガス
ラインに、干渉成分のＮＯ2 をＮＯに還元させるための
触媒を設けたことを特徴としている。According to the present invention, means for solving the above-mentioned problems are constituted as follows. That is, SO 2 for measuring the concentration of SO 2 using an ultraviolet absorption method
(2) In the analyzer, a mercury lamp with a phosphor coated on the surface with a fluorescent material having a luminescence characteristic matching the ultraviolet absorption band of SO 2 is used as an ultraviolet irradiation light source, and the sample is passed through a channel switching means. A catalyst for alternately introducing a sample gas and a comparative gas in a constant period and a constant amount into cells connected to the gas line and the comparative gas line, and reducing the interference component NO 2 to NO in the sample gas line. It is characterized by having provided.
【０００６】[0006]
【作用】ＳＯ2 の紫外線吸収帯に合致した発光特性を有
する螢光材料を塗着した螢光体付水銀ランプにより、Ｓ
Ｏ2 の全紫外線吸収帯にわたり照射光を吸収させること
ができ、かつ、ＮＯ2 の干渉成分は、サンプルガスライ
ンに設けた触媒によって、セルに導入される以前に、予
めＮＯに還元されて除かれて干渉の低減が図られ、高感
度に信頼性よくＳＯ2 を定量分析することができる。A mercury lamp with a phosphor coated with a fluorescent material having a luminous characteristic matching the ultraviolet absorption band of SO 2 ,
Irradiation light can be absorbed over the entire ultraviolet absorption band of O 2 , and the interference component of NO 2 is reduced to NO in advance by a catalyst provided in the sample gas line before being introduced into the cell and removed. As a result, interference can be reduced, and SO 2 can be quantitatively analyzed with high sensitivity and high reliability.
【０００７】[0007]
【実施例】以下に本考案の実施例を図面に基づいて詳細
に説明する。図１（Ａ）は紫外線吸収法を用いたＳＯ2
分析装置１の要部をなすＳＯ2 分析計２の構成を示し、
符号３はその分析計２内に設けられる紫外線照射光源で
水銀ランプの表面にＳＯ2 の紫外線吸収帯と合致した発
光特性を有する螢光材料を塗着した螢光体付水銀ラン
プ、４は流路切換手段を介してサンプルガスライン７と
比較ガスライン８〔図１（Ｂ）参照〕と接続されるセル
で、サンプルガスと比較ガスとを一定周期かつ一定量交
互に導入する。５はセル通過後の光量を検出する光電素
子、６はその検出信号を増幅するための増幅器６であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A shows SO 2 using an ultraviolet absorption method.
1 shows a configuration of an SO 2 analyzer 2 which is a main part of an analyzer 1,
Reference numeral 3 fluorescent body with a mercury lamp with Nurigi the fluorescent material with luminescent characteristics consistent with ultraviolet absorption band of SO 2 on the surface of the mercury lamp in the ultraviolet irradiation light source provided in the analyzer 2, the flow is 4 In a cell connected to the sample gas line 7 and the comparison gas line 8 (see FIG. 1B) via the path switching means, the sample gas and the comparison gas are alternately introduced at a constant period and a constant amount. Reference numeral 5 denotes a photoelectric element for detecting the amount of light after passing through the cell, and reference numeral 6 denotes an amplifier 6 for amplifying the detection signal.
【０００８】そして、そのサンプルガスライン７には、
ＮＯ2 をＮＯに還元させるための触媒９を設けている。The sample gas line 7 includes:
A catalyst 9 for reducing NO 2 to NO is provided.
【０００９】このような構成により、螢光体付水銀ラン
プ３からの照射光はＳＯ2 の紫外線吸収帯と合致した螢
光を発するので、それぞれ両ガスのＳＯ2 の紫外線吸収
帯域の全域でその照射光が透過減衰された後、光電素子
５でその光量が検出される。従って、その出力比に基づ
いて高感度にＳＯ2 の濃度を定量分析することができ
る。[0009] As this configuration, the light irradiated from the fluorescent body with a mercury lamp 3 emits fluorescence consistent with ultraviolet absorption band of SO 2, respectively across the ultraviolet absorption bands of the SO 2 in both gas After the irradiation light is attenuated, the photoelectric element 5 detects the light amount. Therefore, the concentration of SO 2 can be quantitatively analyzed with high sensitivity based on the output ratio.
【００１０】上述の螢光体付水銀ランプ３の発光スペク
トルは、図２に実線で示されるように、一点鎖線で示さ
れるＳＯ2 の紫外線吸収スペクトルとほぼ合致してい
る。これにより、上述のように、ＳＯ2 の吸収帯を有効
に利用でき、高感度な測定をおこなえるのである。な
お、破線は光電素子のスペクトル感知幅を表している。The emission spectrum of the above-described mercury lamp 3 with a fluorescent substance substantially matches the ultraviolet absorption spectrum of SO 2 indicated by a dashed line as shown by a solid line in FIG. Thereby, as described above, the absorption band of SO 2 can be effectively used, and highly sensitive measurement can be performed. Note that the broken line represents the spectral sensing width of the photoelectric device.
【００１１】そして、ＳＯ2 の紫外線吸収帯は、波長の
長い部分で、図２に二点鎖線で示すＮＯ2 の吸収帯と重
複していることから、サンプルガス中のＮＯ2 をセル４
に導入する前に、予め触媒９でＮＯに還元させておき、
ＳＯ2 の吸収帯と重ならないようにして干渉の低減化を
図っており、これにより、上述の高感度な定量分析の信
頼性を一層向上させることができる。[0011] Then, an ultraviolet absorption band of the SO 2 is a long portion of wavelengths, since it overlaps with the absorption band of NO 2 as shown in FIG. 2 by the two-dot chain line, the cell 4 to NO 2 in the sample gas
Before being introduced to
The interference is reduced so as not to overlap with the absorption band of SO 2 , whereby the reliability of the above-described quantitative analysis with high sensitivity can be further improved.
【００１２】[0012]
【考案の効果】以上説明したように、本考案の紫外線吸
収法を用いたＳＯ2 分析装置によれば、紫外線照射光源
としてＳＯ2 の紫外線吸収帯と合致した発光スペクトル
を有する螢光体付水銀ランプを用いたので、ＳＯ2 の紫
外線吸収帯を有効に利用することができ、かつ、サンプ
ルガスラインにＮＯ2 をＮＯに還元させるための触媒を
設けて、ＳＯ2 の紫外線吸収帯と部分的に重複する紫外
線吸収帯を有するサンプルガス中のＮＯ2 による干渉の
発生を防ぎ、高感度なＳＯ2 の定量分析が可能となっ
た。As described above, according to the SO 2 analyzer using the ultraviolet absorption method of the present invention, mercury with a phosphor having an emission spectrum matching the ultraviolet absorption band of SO 2 as an ultraviolet irradiation light source. Since the lamp is used, the ultraviolet absorption band of SO 2 can be effectively used, and a catalyst for reducing NO 2 to NO is provided in the sample gas line to partially overlap the ultraviolet absorption band of SO 2. Thus, it was possible to prevent the occurrence of interference due to NO 2 in the sample gas having an ultraviolet absorption band overlapping with that described above, and to perform highly sensitive quantitative analysis of SO 2 .
【図１】（Ａ）は本考案の紫外線吸収法を用いたＳＯ2
分析装置の要部構成、（Ｂ）はそのＳＯ2 分析装置のガ
ス供給系を示している。FIG. 1 (A) shows SO 2 using the ultraviolet absorption method of the present invention.
(B) shows a gas supply system of the SO 2 analyzer.
【図２】同螢光体付水銀ランプの発光スペクトルとＳＯ
2 の紫外線吸収スペクトル等を対比して表示したグラフ
である。FIG. 2 shows the emission spectrum and SO of the mercury lamp with the phosphor.
2 is a graph in which the ultraviolet absorption spectrum and the like of No. 2 are displayed in comparison.
【図３】従来のＳＯ2 分析装置の要部構成図である。FIG. 3 is a configuration diagram of a main part of a conventional SO 2 analyzer.
１…紫外線吸収法を用いたＳＯ2 分析装置、２…紫外線
螢光分析計（ＳＯ2 分析計）、３…螢光体付水銀ラン
プ、４…セル、７…サンプルガスライン、８…比較ガス
ライン、９…触媒。1 ... ultraviolet absorption method SO 2 spectrometer using a 2 ... ultraviolet fluorescent analyzer (SO 2 analyzer), 3 ... fluorescent body with a mercury lamp, 4 ... cell, 7 ... sample gas line, 8 ... reference gas Line, 9 ... catalyst.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−218845（ＪＰ，Ａ) 特開 昭47−24890（ＪＰ，Ａ) 特開 昭53−11089（ＪＰ，Ａ) 実開 昭61−140949（ＪＰ，Ｕ) 実開 昭59−162630（ＪＰ，Ｕ) 実開 昭52−138791（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 21/00 - 21/61 G01N 31/00 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-218845 (JP, A) JP-A-47-24890 (JP, A) JP-A-53-11089 (JP, A) 140949 (JP, U) Fully open sho 59-162630 (JP, U) Fully open sho 52-138791 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G01N 21/00-21 / 61 G01N 31/00
Claims (1)
定するＳＯ2 分析装置において、紫外線照射光源とし
て、ＳＯ2 の紫外線吸収帯と合致した発光特性を有する
螢光材料を表面に塗着した螢光体付水銀ランプを用い、
かつ流路切換手段を介してサンプルガスラインと比較ガ
スラインとに接続されるセルにサンプルガスと比較ガス
とを一定周期かつ一定量交互に導入するとともに、前記
サンプルガスラインに、干渉成分のＮＯ2 をＮＯに還元
させるための触媒を設けたことを特徴とする紫外線吸収
法を用いたＳＯ2 分析装置。In an SO 2 analyzer for measuring the concentration of SO 2 using an ultraviolet absorption method, a fluorescent material having a light emission characteristic matching the ultraviolet absorption band of SO 2 is coated on the surface as an ultraviolet irradiation light source. Using a phosphor-equipped mercury lamp,
And a sample gas and a comparative gas are alternately introduced into the cell connected to the sample gas line and the comparative gas line via the flow path switching means at a constant period and a constant amount, and the sample gas line is An SO 2 analyzer using an ultraviolet absorption method, comprising a catalyst for reducing NO 2 as an interference component to NO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993033710U JP2606921Y2 (en) | 1993-05-27 | 1993-05-27 | SO2 analyzer using ultraviolet absorption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993033710U JP2606921Y2 (en) | 1993-05-27 | 1993-05-27 | SO2 analyzer using ultraviolet absorption method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0686061U JPH0686061U (en) | 1994-12-13 |
| JP2606921Y2 true JP2606921Y2 (en) | 2001-02-19 |
Family
ID=12393972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993033710U Expired - Lifetime JP2606921Y2 (en) | 1993-05-27 | 1993-05-27 | SO2 analyzer using ultraviolet absorption method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2606921Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4683624B2 (en) * | 2005-05-11 | 2011-05-18 | 株式会社四国総合研究所 | Method and apparatus for continuously measuring sulfur trioxide concentration |
| JP4641255B2 (en) * | 2005-12-22 | 2011-03-02 | 住友精化株式会社 | Nitric oxide purification method |
-
1993
- 1993-05-27 JP JP1993033710U patent/JP2606921Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0686061U (en) | 1994-12-13 |
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