JPH0317298B2 - - Google Patents
Info
- Publication number
- JPH0317298B2 JPH0317298B2 JP13934083A JP13934083A JPH0317298B2 JP H0317298 B2 JPH0317298 B2 JP H0317298B2 JP 13934083 A JP13934083 A JP 13934083A JP 13934083 A JP13934083 A JP 13934083A JP H0317298 B2 JPH0317298 B2 JP H0317298B2
- Authority
- JP
- Japan
- Prior art keywords
- tht
- concentration
- iodine
- complex
- gas
- 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
- 229910052740 iodine Inorganic materials 0.000 claims description 14
- 239000011630 iodine Substances 0.000 claims description 14
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 8
- 238000002835 absorbance Methods 0.000 claims description 7
- 239000003205 fragrance Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 150000002496 iodine Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【発明の詳細な説明】
本発明はガスの付臭剤として使用されるTHT
（tetra hydrothlophene）の濃度を測定する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to THT used as a gas odorant.
This invention relates to a method for measuring the concentration of (tetra hydrothlophene).
都市ガスの臭気濃度基準が強化されるに伴つ
て、付臭剤の添加量の管理は保安の確保上、益々
重要な課題となつている。 As the odor concentration standards for city gas have become stricter, controlling the amount of odorant added has become an increasingly important issue in terms of ensuring safety.
しかしながら、従来わが国のガス事業者によつ
て使用される付臭剤、特に、THTには、簡単な
測定方法がなく、その添加量の管理に当つては、
装置が高価で、しかも高度の分析技術を必要とす
るEPDガスクロマトグラフ法しかなかつた。 However, there is no easy way to measure the odorants used by gas utilities in Japan, especially THT, and it is difficult to control the amount added.
EPD gas chromatography was the only method available, which requires expensive equipment and advanced analytical techniques.
本発明はかかる実情に鑑みてなされたもので、
ガス中のTHTの濃度を測定するため、THT−
ヨウ素錯体の紫外吸収を利用しようとするもの
で、比較的簡易な手段で行ないうる濃度測定法を
提供することをその目的とするものである。本発
明者等は第１図に示すごとくTHTとヨウ素とか
ら形成された錯体が波長300〜315nｍの紫外吸収
を示すことを見出し、本発明を完成するに至りた
るものである。 The present invention was made in view of such circumstances, and
To measure the concentration of THT in gas, THT−
This method utilizes the ultraviolet absorption of iodine complexes, and its purpose is to provide a method for measuring concentration that can be performed using relatively simple means. The present inventors have discovered that a complex formed from THT and iodine exhibits ultraviolet absorption at a wavelength of 300 to 315 nm, as shown in FIG. 1, and have completed the present invention.
本測定方法の実施にあたつては一般的な紫外分
光光度計を用いて行うことができるが、操作の簡
易化を図るために付臭剤であるTHTを含有する
試料ガスをセル等に導き、予め用意してあるヨウ
素溶液に吸収せしめて、THT−ヨウ素錯体を生
成し、該錯体溶液に対しセル外部から特定波長光
例えば308nｍを含む紫外光を投光し該セルの通
過により吸収された度合を計測し、さらに、該紫
外吸光度に基づいてTHT濃度を求めるものであ
る。こうすることにより実機にあつては、測定所
要時間が約10数分で、正確な濃度値が得られるこ
とが判明した。 This measurement method can be carried out using a general ultraviolet spectrophotometer, but in order to simplify the operation, a sample gas containing THT, an odorant, is introduced into a cell, etc. A THT-iodine complex is produced by absorbing it into an iodine solution prepared in advance, and UV light containing a specific wavelength, for example, 308 nm, is projected onto the complex solution from outside the cell, and the THT-iodine complex is absorbed by passing through the cell. The THT concentration is determined based on the ultraviolet absorbance. It has been found that by doing this, accurate concentration values can be obtained in an actual device in about 10 minutes.
以下図面を参照し実施例に基づいて本発明の説
明する。 The present invention will be described below based on embodiments with reference to the drawings.
第３図は本発明の一実施例を示す要部説明図で
ある。THT吸収及び測光用のセル４には予めヨ
ウ素溶液が収容されていてここに試料ガスが試料
ガス用ポンプ７及びボールフイルタ８を通じて導
入される。このヨウ素溶液は第２図に示す如く溶
液中のTHT濃度が20μｇ／mlまでの範囲で測定
を行う場合、直線性を考慮するとヨウ素濃度を
0.022％以下にする必要がある。また、感度を考
慮すると0.01％以上であることが望ましいことか
ら、結局0.01〜0.02％であることが望ましい。ヨ
ウ素溶液に吸収される試料ガス量は一定量に設定
され、撹拌手段等を利用してTHTとヨウ素との
錯体の生成が促進される。 FIG. 3 is an explanatory diagram of main parts showing one embodiment of the present invention. The cell 4 for THT absorption and photometry contains an iodine solution in advance, and a sample gas is introduced therein through a sample gas pump 7 and a ball filter 8. As shown in Figure 2, this iodine solution is suitable for measuring iodine concentration in the range of up to 20 μg/ml of THT in the solution, considering linearity.
It is necessary to keep it below 0.022%. Further, considering the sensitivity, it is desirable that the content be 0.01% or more, so it is desirable that the content be 0.01 to 0.02%. The amount of sample gas absorbed into the iodine solution is set to a constant amount, and the formation of a complex between THT and iodine is promoted using a stirring means or the like.
光源１から発せられる光束は集光レンズ２及び
干渉フイルタ３を通過してセル４に投光せしめら
れる。セル４を通過した光は集光レンズ５を通過
し検知器６により該単色光の光量が検知される。 A light beam emitted from a light source 1 passes through a condenser lens 2 and an interference filter 3 and is projected onto a cell 4. The light that has passed through the cell 4 passes through a condenser lens 5, and a detector 6 detects the amount of monochromatic light.
かくして、紫外の吸収光（308nｍ）の光量か
ら紫外吸光度に基づいてガス中のTHT濃度が算
出可能となる。紫外吸光度の測定及びTHT濃度
の算出には分光光度計の使用が好ましい。 In this way, the THT concentration in the gas can be calculated based on the ultraviolet absorbance from the amount of ultraviolet absorbed light (308 nm). It is preferable to use a spectrophotometer to measure ultraviolet absorbance and calculate THT concentration.
本発明は以上の構成に基づくものであつて、供
試ガス中に含まれるTHTがヨウ素と容易に錯体
を形成し、しかも、該錯体に吸収される特定紫外
光の吸光度によりガス中の濃度が容易に算出し得
るものであつて、付臭剤濃度の迅速確実な測定法
として極めて有用なものである。 The present invention is based on the above structure, and the THT contained in the sample gas easily forms a complex with iodine, and the concentration in the gas is determined by the absorbance of specific ultraviolet light absorbed by the complex. It can be easily calculated and is extremely useful as a rapid and reliable method for measuring odorant concentration.
第１図は、THT−ヨウ素錯体の紫外線吸収状
態を示しタテ軸は吸光度を、また、ヨコ軸は波長
（ｎｍ）を表示するグラフであり、第２図は、
THT−ヨウ素錯体の吸光度の直線範囲を示しタ
テ軸は直線性を示すTHT濃度限界（μｇ／ml）
を、また、ヨコ軸はヨウ素濃度（wt／vol％）を
表示するグラフであり、第３図は本発明方法を実
施するための装置を示す説明図である。
１……光源、２……集光レンズ、３……干渉フ
イルター、４……セル、５……集光レンズ、６…
…検知器、７……試料ガス用ポンプ、８……ボー
ルフイルタ。
Figure 1 is a graph showing the ultraviolet absorption state of the THT-iodine complex, with the vertical axis representing absorbance and the horizontal axis representing wavelength (nm).
The linear range of absorbance of the THT-iodine complex is shown, and the vertical axis is the THT concentration limit (μg/ml) showing linearity.
The horizontal axis is a graph showing the iodine concentration (wt/vol%), and FIG. 3 is an explanatory diagram showing an apparatus for carrying out the method of the present invention. 1... Light source, 2... Condensing lens, 3... Interference filter, 4... Cell, 5... Condensing lens, 6...
…Detector, 7…Sample gas pump, 8…Ball filter.
Claims (1)
液に吸収させてTHT−ヨウ素錯体を生成せしめ
る第１工程と、該錯体溶液に対し該錯体により紫
外吸収される光束を投射する第２工程と、紫外吸
光度に基づいてガス中のTHT濃度を算出する第
３工程とから構成されることを特徴とするガス中
の付臭剤THTの濃度測定法。1. A first step in which a sample gas containing the odorant THT is absorbed into an iodine solution to generate a THT-iodine complex, and a second step in which a light flux that is absorbed by the complex in ultraviolet light is projected onto the complex solution. A method for measuring the concentration of an odorant THT in a gas, comprising a third step of calculating the THT concentration in the gas based on ultraviolet absorbance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13934083A JPS6031056A (en) | 1983-08-01 | 1983-08-01 | Method for measuring concentration of odorant tht in gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13934083A JPS6031056A (en) | 1983-08-01 | 1983-08-01 | Method for measuring concentration of odorant tht in gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6031056A JPS6031056A (en) | 1985-02-16 |
| JPH0317298B2 true JPH0317298B2 (en) | 1991-03-07 |
Family
ID=15243047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13934083A Granted JPS6031056A (en) | 1983-08-01 | 1983-08-01 | Method for measuring concentration of odorant tht in gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031056A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0836091A1 (en) * | 1996-10-09 | 1998-04-15 | Osaka Gas Company Limited | Method and apparatus for measuring odorant concentration and odorant adding system |
| IT201600096720A1 (en) * | 2015-09-28 | 2018-03-27 | Automa S R L | DEVICE AND METHOD OF ANALYSIS OF THE ODORIZATION OF A GAS. |
-
1983
- 1983-08-01 JP JP13934083A patent/JPS6031056A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6031056A (en) | 1985-02-16 |
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