JPH0416198Y2 - - Google Patents
Info
- Publication number
- JPH0416198Y2 JPH0416198Y2 JP16725584U JP16725584U JPH0416198Y2 JP H0416198 Y2 JPH0416198 Y2 JP H0416198Y2 JP 16725584 U JP16725584 U JP 16725584U JP 16725584 U JP16725584 U JP 16725584U JP H0416198 Y2 JPH0416198 Y2 JP H0416198Y2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- concentration
- measuring
- container
- nitrogen dioxide
- 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
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 230000002745 absorbent Effects 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 2
- 229910002113 barium titanate Inorganic materials 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 13
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 13
- 239000007789 gas Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011841 epidemiological investigation Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は大気汚染気体物質の濃度測定用試料採
取装置に関し、更に詳しくは、気象条件特に低温
環境が原因による測定誤差を少なくすることので
きる大気汚染気体物質の濃度測定用試料採取装置
に関するものである。[Detailed description of the invention] (Field of industrial application) The present invention relates to a sampling device for measuring the concentration of air polluting gaseous substances, and more specifically, it is capable of reducing measurement errors caused by weather conditions, especially low-temperature environments. This invention relates to a sampling device for measuring the concentration of air polluting gaseous substances.
（従来の技術とその問題点）
気液分子拡散吸収の原理に基づいた大気汚染気
体物質の濃度測定用試料採取器、いわゆるパーソ
ナルサンプラー（大気汚染気体物質の個人被曝量
測定用サンプラー）は実公昭58−30220号公報に
おいて提案されている。この提案の１つの実施態
様である二酸化窒素濃度測定用試料採取器（東洋
濾紙社製、商品名フイルターバツジNO2）は、
二酸化窒素の吸収剤としてトリエタノールアミン
を使用している。ところが二酸化窒素とトリエタ
ノールアミンとの吸着反応は、氷点以下ではほと
んど進行しないことが知られている。すなわち、
二酸化窒素濃度測定用試料採取器は、特に低温環
境、例えば寒冷地域の冬期屋外において、ほとん
ど二酸化窒素が捕集されないという欠点を有して
いる。(Prior art and its problems) A sample collector for measuring the concentration of air polluting gaseous substances based on the principle of gas-liquid molecular diffusion absorption, the so-called personal sampler (a sampler for measuring personal exposure to air polluting gaseous substances), was developed by Jikosho. This is proposed in Publication No. 58-30220. One embodiment of this proposal is a sample collector for measuring nitrogen dioxide concentration (manufactured by Toyo Roshi Co., Ltd., trade name: Filter Badge NO 2 ).
Triethanolamine is used as a nitrogen dioxide absorbent. However, it is known that the adsorption reaction between nitrogen dioxide and triethanolamine hardly progresses below the freezing point. That is,
Sample collectors for measuring nitrogen dioxide concentration have the disadvantage that very little nitrogen dioxide is collected, especially in low-temperature environments, for example outdoors in winter in cold regions.
（問題点を解決するための手段）
本考案者は、かかる問題点を解決すべく鋭意検
討を重ねた結果、大気汚染気体物質の濃度測定用
試料採取器に温度制御することが可能な発熱体と
して、発熱作用と温度制御機能を兼備えた発熱体
及び必要に応じて保温体を具備させることにより
大気汚染気体物質の濃度測定用試料採取器が低温
環境において、例えば二酸化窒素等の汚染気体を
精度よく捕集出来ることを見出した。(Means for Solving the Problems) As a result of intensive studies to solve these problems, the present inventor has developed a heating element capable of temperature control in a sample collector for measuring the concentration of air polluting gaseous substances. By equipping a heating element with both heat generation and temperature control functions and, if necessary, a heat insulator, the sample collector for measuring the concentration of air pollutant gases can collect pollutant gases such as nitrogen dioxide in low-temperature environments. We discovered that it can be collected with high accuracy.
本考案に用いる温度制御することが可能な発熱
体としては、サーミスタツト付の電熱線、赤外線
ランプ、または正特性サーミスタ（商品名ポジス
タ、村田製作所製）等が考えられるが、濃度測
定用試料採取器を適温に加熱することが必要であ
る、保温装置が大型化しないこと経済性（特
に装置の価格や消費電力量）等を考慮して正特性
サーミスタを使用するのが特に好ましい。 Possible heating elements that can be used in this invention to control the temperature include a heating wire with a thermistor, an infrared lamp, or a positive temperature coefficient thermistor (product name POSISTOR, manufactured by Murata Manufacturing Co., Ltd.). It is particularly preferable to use a positive temperature coefficient thermistor in consideration of the need to heat the container to an appropriate temperature, the need to avoid increasing the size of the heat-retaining device, and economic efficiency (particularly the price and power consumption of the device).
正特性サーミスタはチタン酸バリウムに希土類
元素を微量添加した常温の比抵抗が10〜106Ω・
cmになるｎ型の原子価制御形半導体を使用してい
る。しかしてこの正特性サーミスタ（正の抵抗温
度特性をもつた感熱抵抗素子）は従来のサーミス
タと呼ばれる感熱抵抗素子がすべて負特性を示す
のに対して著しい正の温度特性を持つているた
め、定温度発熱体として本考案の装置に極めて有
利に使用することができる。 Positive characteristic thermistors are barium titanate with a trace amount of rare earth elements added and have a specific resistance at room temperature of 10 to 10 6 Ω.
It uses an n-type valence-controlled semiconductor with a diameter of cm. However, this positive temperature coefficient thermistor (a heat-sensitive resistance element with a positive resistance-temperature characteristic) has a significantly positive temperature characteristic, whereas all conventional heat-sensitive resistance elements called thermistors exhibit negative characteristics. It can be used very advantageously in the device of the invention as a temperature heating element.
以下本考案を図面を用いて具体的に説明する。 The present invention will be specifically explained below using the drawings.
第１図および第２図は本考案の一実施例を模式
的に示す図である。 FIGS. 1 and 2 are diagrams schematically showing an embodiment of the present invention.
この実施装置は箱型容器１の底面に開口部を設
け、大気中の濃度を測定すべき気体、例えば
NO2の吸収剤であるトリエタノールアミンを含
浸した給水性紙を内蔵しかつ大気に対する開放
面を有する二酸化窒素濃度測定用試料採取器２の
開放面を外側に向けて開口部に固定し、かつ箱型
容器１内に、正特性サーミスタ４と必要に応じて
保温材３を満してなるもので濃度測定用試料採取
器２の開放面でない面は、例えば約20℃になるよ
うに調整される。 This implementation device has an opening in the bottom of a box-shaped container 1, and a gas whose concentration in the atmosphere is to be measured, e.g.
A sample collector 2 for measuring nitrogen dioxide concentration, which has a built-in water supply paper impregnated with triethanolamine, which is an NO 2 absorbent, and has a surface open to the atmosphere, is fixed in the opening with the open surface facing outward, and A box-shaped container 1 is filled with a positive temperature coefficient thermistor 4 and, if necessary, a heat insulating material 3, and the non-open surface of the sample collector 2 for concentration measurement is adjusted to have a temperature of, for example, about 20°C. Ru.
本考案で用いる箱形容器は種々の形態をとるこ
とが可能であり、また材質も特に指定はなく、金
属、プラスチツク、木材などから、加工性、断熱
性等を考慮して任意に選択することができる。こ
の実施装置では二酸化窒素濃度測定用試料採取器
２を用いているが、他の大気汚染気体物質の濃度
測定用試料採取器、例えば一酸化窒素、二酸化イ
オウ、オキシダント、ホルマリン等の濃度測定用
試料採取器に変更することも可能である。なお保
温材としてはガラスウールのほか石綿なども使用
することが可能である。 The box-shaped container used in this invention can take various forms, and the material is not particularly specified, and can be arbitrarily selected from metal, plastic, wood, etc., taking into consideration workability, heat insulation, etc. I can do it. Although this implementation device uses a sample collector 2 for measuring the concentration of nitrogen dioxide, other sample collectors can be used for measuring the concentration of other air polluting gases, such as samples for measuring the concentration of nitrogen monoxide, sulfur dioxide, oxidants, formalin, etc. It is also possible to change it to a collector. In addition to glass wool, asbestos can also be used as a heat insulating material.
次に本考案に従つて二酸化窒素濃度測定用試料
採取装置として構成した場合の性能を第３図に示
す。第３図は氷点以下の環境中における種々の
NO2濃度を本考案による装置で得た試料採取器
からの測定結果とザルツマン自動分析装置で測定
した結果を示したものである。 Next, FIG. 3 shows the performance when configured as a sample collection device for measuring nitrogen dioxide concentration according to the present invention. Figure 3 shows various conditions in an environment below freezing point.
This figure shows the measurement results of the NO 2 concentration obtained from the sample collector using the device according to the present invention and the results measured using the Salzman automatic analyzer.
この図から両測定結果の間には、回帰式ｙ＝
0.62x＋4.1、相関係数0.92と良い相関関係にある
ことがわかる。なお本考案の装置を用いない場合
には、同じ二酸化窒素濃度測定用試料採取器によ
り同じ環境下でほとんど二酸化窒素を捕集できな
かつた。 From this figure, there is a regression equation y=
It can be seen that there is a good correlation with 0.62x + 4.1 and a correlation coefficient of 0.92. Note that when the device of the present invention was not used, almost no nitrogen dioxide could be collected under the same environment using the same sample collector for measuring nitrogen dioxide concentration.
（考案の効果）
本考案の装置を用いることにより大気汚染気体
物質の低温環境下における精度のよい捕集が可能
となり大気汚染気体物質の実態を把握する上で、
または疫学的に調査する上でも大気汚染気体物質
の精度の高い分析が行なえるという実用的効果が
奏される。(Effects of the invention) By using the device of the invention, it is possible to collect air polluting gaseous substances with high accuracy in a low-temperature environment, and in understanding the actual situation of air polluting gaseous substances,
Also, in epidemiological investigations, there is a practical effect in that highly accurate analysis of air polluting gaseous substances can be performed.
第１図は本考案の実施態様を模式的に示す断面
図、第２図は同じく平面図、第３図は氷点以下の
環境中における種々の二酸化窒素濃度を、本考案
による装置に取付けた試料採取器からの測定結果
とザルツマン自動分析装置とで測定した結果を示
す図である。
１……箱形容器、２……二酸化窒素濃度測定用
試料採取器、３……保温材、４……発熱体。
FIG. 1 is a cross-sectional view schematically showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a sample installed in the device according to the present invention to measure various nitrogen dioxide concentrations in an environment below the freezing point. FIG. 3 is a diagram showing the measurement results from the sampler and the results measured by the Salzmann automatic analyzer. 1... Box-shaped container, 2... Sample collector for measuring nitrogen dioxide concentration, 3... Heat insulating material, 4... Heating element.
Claims (1)
備えかつ大気に対する開放面を有する気液分子
拡散吸収型試料採取器に、発熱体を付設してな
る大気汚染気体物質の濃度測定用試料採取装
置。 (2) 容器の開口部に前記試料採取器の開放面を外
側に向けて固定し、該容器内に発熱体又は発熱
体と保温体を設けてなる前項１記載の装置。 (3) 発熱体としてチタン酸バリウムに希上類元素
を添加してなり、常温の比抵抗が10〜106Ω・
cmであるｎ型原子価制御型半導体を用いた前項
１又は２記載の装置。[Scope of Claim for Utility Model Registration] (1) A gas-liquid molecular diffusion absorption type sampling device equipped with an absorbent containing an absorbent for the gas whose concentration is to be measured and having a surface open to the atmosphere, and a heating element attached thereto. Sampling device for measuring the concentration of air polluting gaseous substances. (2) The device according to item 1 above, wherein the sample collector is fixed to the opening of a container with the open surface facing outward, and a heating element or a heating element and a heat insulator are provided in the container. (3) The heating element is made by adding rare elements to barium titanate, and the specific resistance at room temperature is 10 to 10 6 Ω.
3. The device according to item 1 or 2 above, which uses an n-type valence-controlled semiconductor of cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16725584U JPH0416198Y2 (en) | 1984-11-02 | 1984-11-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16725584U JPH0416198Y2 (en) | 1984-11-02 | 1984-11-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6182246U JPS6182246U (en) | 1986-05-31 |
| JPH0416198Y2 true JPH0416198Y2 (en) | 1992-04-10 |
Family
ID=30725057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16725584U Expired JPH0416198Y2 (en) | 1984-11-02 | 1984-11-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0416198Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7618594B2 (en) | 2004-08-18 | 2009-11-17 | Geno Llc | Conversion of nitrogen dioxide (NO2) to nitric oxide (NO) |
| AU2005277397B2 (en) | 2004-08-18 | 2011-08-25 | VERO Biotech LLC. | Conversion of nitrogen dioxide (NO2) to nitric oxide (NO) |
| AU2009209181B2 (en) * | 2008-01-28 | 2014-01-16 | VERO Biotech LLC. | Conversion of nitrogen dioxide (NO2) to nitric oxide (NO) |
| US8607785B2 (en) | 2008-08-21 | 2013-12-17 | Geno Llc | Systems and devices for generating nitric oxide |
| US8613958B2 (en) | 2009-06-22 | 2013-12-24 | Geno Llc | Nitric oxide therapies |
-
1984
- 1984-11-02 JP JP16725584U patent/JPH0416198Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6182246U (en) | 1986-05-31 |
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