JP5429014B2 - Air purifier and total organic carbon measuring apparatus using the air purifier - Google Patents

Air purifier and total organic carbon measuring apparatus using the air purifier Download PDF

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JP5429014B2
JP5429014B2 JP2010092004A JP2010092004A JP5429014B2 JP 5429014 B2 JP5429014 B2 JP 5429014B2 JP 2010092004 A JP2010092004 A JP 2010092004A JP 2010092004 A JP2010092004 A JP 2010092004A JP 5429014 B2 JP5429014 B2 JP 5429014B2
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carbon dioxide
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雅人 矢幡
健志 居原田
勝敏 藤井
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Shimadzu Corp
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Description

本発明は、二酸化炭素を除去した空気を生成するための空気精製装置、及びその空気精製装置の用途の一例としてその空気精製装置を用いた全有機体炭素（ＴＯＣ）測定装置に関するものである。二酸化炭素の含有量が少ない空気は、例えばＴＯＣ測定装置において採取した試料水中に存在する二酸化炭素（ＩＣ）を除去するための通気処理に用いることができる。   The present invention relates to an air purifier for generating air from which carbon dioxide has been removed, and a total organic carbon (TOC) measuring apparatus using the air purifier as an example of the use of the air purifier. The air having a low carbon dioxide content can be used for aeration treatment for removing carbon dioxide (IC) present in sample water collected by a TOC measuring device, for example.

ＴＯＣ測定装置は、試料水に含まれる有機体炭素を酸化分解して二酸化炭素に変換した後、二酸化炭素濃度を計測することにより試料水の有機体炭素を測定する装置である。試料水には有機体炭素を酸化分解する前から二酸化炭素が含まれており、その状態で有機物炭素を二酸化炭素に変換して二酸化炭素濃度を計測すると、全炭素（ＴＣ）を測定することができる。ＴＣとＩＣを別個に測定し、（ＴＣ−ＩＣ）としてＴＯＣを求めることもできる。一方、ＴＯＣを直接測定しようとすると、ＩＣを除去しない場合は有機体炭素の測定値は実際よりも大きくなってしまう。そのため、ＴＯＣ測定装置には試料水中に既存する二酸化炭素を除去するための二酸化炭素除去部が設けられている。   The TOC measuring device is a device that measures the organic carbon in the sample water by measuring the carbon dioxide concentration after the organic carbon contained in the sample water is oxidized and decomposed into carbon dioxide. The sample water contains carbon dioxide before the organic carbon is oxidatively decomposed, and when carbon dioxide concentration is measured by converting organic carbon to carbon dioxide in that state, total carbon (TC) can be measured. it can. It is also possible to measure TC and IC separately and to obtain TOC as (TC-IC). On the other hand, when trying to measure TOC directly, the measured value of organic carbon becomes larger than the actual value when IC is not removed. For this reason, the TOC measuring device is provided with a carbon dioxide removing unit for removing carbon dioxide existing in the sample water.

二酸化炭素除去部において行なわれる処理としては、試料水中に通気ガス（スパージガス）を供給する通気処理が一般的である（例えば、特許文献１参照。）。そのような二酸化炭素除去部に通気ガスを供給するために、従来では、二酸化炭素やＴＯＣの濃度が極低濃度の高純度空気ボンベを装置に接続するほか、空気を７００℃〜９００℃で燃焼してその空気中のＴＯＣを二酸化炭素に変換し、その空気をソーダライムに通すことで二酸化炭素をソーダライムに吸収させて二酸化炭素やＴＯＣが除去された空気を精製する空気精製装置を設置するなどしていた。   As a process performed in the carbon dioxide removal unit, an aeration process for supplying an aeration gas (sparge gas) into the sample water is generally used (see, for example, Patent Document 1). In order to supply aeration gas to such a carbon dioxide removal unit, conventionally, a high-purity air cylinder having extremely low concentrations of carbon dioxide and TOC is connected to the apparatus, and air is burned at 700 ° C. to 900 ° C. Then, the TOC in the air is converted into carbon dioxide, and the air is passed through soda lime so that the carbon dioxide is absorbed by soda lime, and an air purifier that purifies the air from which carbon dioxide and TOC have been removed is installed. Etc.

特開２００８−１３９２２９号公報JP 2008-139229 A

しかし、高純度空気ボンベを装置に接続すると、高純度空気ボンベの高純度空気がなくなったときにボンベを取り換えなければならず、ボンベを交換するための費用が必要となり維持コストが高くなるという問題があった。また、空気を燃焼後にソーダライムに通す空気精製装置は空気を燃焼させるための燃焼炉が必要なために設置面積が大きくなるという問題があった。   However, when a high-purity air cylinder is connected to the equipment, the high-purity air cylinder must be replaced when the high-purity air is exhausted, and the cost of replacing the cylinder is required, which increases the maintenance cost. was there. In addition, an air purifier that passes air through soda lime after combustion requires a combustion furnace for burning air, so that there is a problem that an installation area becomes large.

そこで本発明は、設置面積が小さく維持コストも低減された空気精製装置及びＴＯＣ測定装置を提供することを目的とするものである。   Accordingly, an object of the present invention is to provide an air purification apparatus and a TOC measurement apparatus that have a small installation area and reduced maintenance costs.

本発明の空気精製装置は、粒状のソーダライムを導入口と排出口を有する容器内に充填したソーダライム管と粒状の活性炭を導入口と排出口を有する容器内に充填した活性炭管が直列に接続された空気精製部を備え、空気を空気精製部のソーダライム管及び活性炭管に通すことにより精製するものである。   In the air purifying apparatus of the present invention, a soda lime pipe filled with granular soda lime in a container having an inlet and an outlet and an activated carbon pipe filled with granular activated carbon in a container having an inlet and an outlet are connected in series. It has a connected air purification unit, and purifies the air by passing it through a soda lime tube and an activated carbon tube of the air purification unit.

活性炭は主にＴＯＣを吸着させ、ソーダライムは主に二酸化炭素を吸着させるものであり、これらを一定量のユニットにし、交互に接続させることで空気からＴＯＣと二酸化炭素を効率的に除去することができる。   Activated charcoal mainly adsorbs TOC, soda lime adsorbs mainly carbon dioxide, and these are united in a certain amount and are connected alternately to efficiently remove TOC and carbon dioxide from the air. Can do.

ところで、活性炭にはソーダライムに比べて多くの二酸化炭素やＴＯＣの量が吸着している。空気精製装置の最下流部に活性炭管があると、活性炭に初めから吸着していた二酸化炭素やＴＯＣが精製された空気とともに出てくることがある。そこで、最下流部の管にはソーダライム管を接続しておくことが好ましい。そうすれば、活性炭管から出てきた二酸化炭素をソーダライムに吸着させることができる。   By the way, activated carbon has more carbon dioxide and TOC adsorbed than soda lime. If there is an activated carbon pipe at the most downstream part of the air purifier, carbon dioxide or TOC adsorbed on the activated carbon from the beginning may come out with purified air. Therefore, it is preferable to connect a soda lime pipe to the most downstream pipe. If it does so, the carbon dioxide which came out of the activated carbon tube can be made to adsorb | suck to soda lime.

１つのソーダライム管と１つの活性炭管とを直列に接続して空気精製部を構成した場合、ごく稀に空気中の二酸化炭素やＴＯＣが空気精製部に吸着されずに出てくることがあり、その二酸化炭素やＴＯＣを含んだ空気をＴＯＣ測定装置などの測定装置に供給すると、正確な測定ができなくなる。そこで、空気精製部はソーダライム管と活性炭管とをそれぞれ２つ以上備え、ソーダライム管と活性炭管が交互に接続されていることが好ましい。そうすれば、仮に上流側のソーダライム管や活性炭管で吸着さなかった二酸化炭素やＴＯＣが存在したとしてもそれよりも下流側のソーダライム管や活性炭管に吸着させることができる。また、ソーダライム管と活性炭管を交互に接続することにより、活性炭表面の一部がアルカリ性となり酸性有機ガスや二酸化炭素の吸着能力が付加され、交互に接続することにより、効率的にＴＯＣと二酸化炭素が除去される。   When an air purification unit is configured by connecting one soda lime tube and one activated carbon tube in series, carbon dioxide and TOC in the air may come out without being adsorbed by the air purification unit. If the carbon dioxide or TOC-containing air is supplied to a measuring device such as a TOC measuring device, accurate measurement cannot be performed. Therefore, it is preferable that the air purification section includes two or more soda lime tubes and activated carbon tubes, and the soda lime tubes and activated carbon tubes are alternately connected. Then, even if carbon dioxide and TOC that were not adsorbed by the upstream soda lime tube and activated carbon tube exist, they can be adsorbed by the soda lime tube and activated carbon tube downstream of the carbon dioxide and TOC. In addition, by alternately connecting soda lime tubes and activated carbon tubes, a part of the activated carbon surface becomes alkaline, and an adsorption capacity for acidic organic gas and carbon dioxide is added. Carbon is removed.

本発明のＴＯＣ測定装置は、通気ガスを試料水中で通気することにより試料水中に含まれる二酸化炭素を通気ガスによる通気処理により除去する二酸化炭素除去部、二酸化炭素除去部を経た試料水中の有機体炭素を二酸化炭素に変換する酸化反応部及び酸化反応部を経た試料水中の二酸化炭素濃度を計測する二酸化炭素計測部を備えたものであって、二酸化炭素除去部に本発明の空気精製装置が接続されており、空気精製装置で精製された空気が通気ガスとして試料水中に供給されるように構成されているものである。   The TOC measuring apparatus according to the present invention includes a carbon dioxide removing unit that removes carbon dioxide contained in a sample water by aeration treatment with the aeration gas by aeration of the aeration gas in the sample water, and an organic substance in the sample water that has passed through the carbon dioxide removal unit. An oxidation reaction unit that converts carbon to carbon dioxide and a carbon dioxide measurement unit that measures the carbon dioxide concentration in the sample water that has passed through the oxidation reaction unit, the air purification device of the present invention is connected to the carbon dioxide removal unit The air purified by the air purifier is supplied to the sample water as aeration gas.

本発明の空気精製装置は、粒状のソーダライムを導入口と排出口を有する容器内に充填したソーダライム管と粒状の活性炭を導入口と排出口を有する容器内に充填した活性炭管が直列に接続された空気精製部を備えたものであって、高純度空気ボンベや燃焼炉が不要であるので、従来の空気精製装置に比べて設置コストを安くすることができるとともに設置面積を小さくすることができる。   In the air purifying apparatus of the present invention, a soda lime pipe filled with granular soda lime in a container having an inlet and an outlet and an activated carbon pipe filled with granular activated carbon in a container having an inlet and an outlet are connected in series. Since it has a connected air purification unit and does not require a high-purity air cylinder or combustion furnace, the installation cost can be reduced and the installation area can be reduced compared to conventional air purification equipment. Can do.

本発明のＴＯＣ測定装置は本発明の空気精製装置を用いて二酸化炭素除去部に通気ガスを供給するものであるので、従来よりも小型でかつ維持コストを安くすることができる。   Since the TOC measuring apparatus of the present invention supplies the aeration gas to the carbon dioxide removing unit using the air purifying apparatus of the present invention, it is smaller than the conventional one and can be maintained at a lower cost.

空気精製装置の一実施例を概略的に示す流路構成図である。It is a channel lineblock diagram showing roughly one example of an air refining device. 同実施例における空気精製部を詳細に示す平面図である。It is a top view which shows the air purification part in the same Example in detail. ＴＯＣ測定装置の一実施例を概略的に示す流路構成図である。It is a channel lineblock diagram showing roughly one example of a TOC measuring device.

空気精製装置の一実施例を図１及び図２により説明する。
空気精製装置１は、空気精製部２に空気を供給するポンプ１４、空気精製部２の出口にフィルタ１６及びこれらを接続する配管１２ａ，１２ｂからなる。空気精製部２は複数の二酸化炭素吸収管３がチューブ１３により直列に接続されたものである。ポンプ１４は空気を吸引して空気精製部２へ送り込むために設けられており、フィルタ１６は空気精製部２を経た空気から固形物を除去するために設けられている。 An embodiment of the air purifier will be described with reference to FIGS.
The air purification apparatus 1 includes a pump 14 that supplies air to the air purification unit 2, a filter 16 at the outlet of the air purification unit 2, and pipes 12 a and 12 b that connect them. The air purifying unit 2 has a plurality of carbon dioxide absorption tubes 3 connected in series by tubes 13. The pump 14 is provided for sucking air and sending it to the air purification unit 2, and the filter 16 is provided for removing solid matter from the air that has passed through the air purification unit 2.

図２に示されているように、空気精製部２は二酸化炭素吸収管３として、例えば内径が１０〜２０ｍｍ、長さが１５ｃｍ程度のガラス管内に直径が１〜３ｍｍ程度の粒状の活性炭８が２０〜５０ｇ封入された活性炭管４と、例えば内径が１０〜２０ｍｍ、長さが１５ｃｍ程度のガラス管内に直径が1〜３ｍｍ程度の粒状のソーダライム１０が２０〜５０ｇ封入されたソーダライム管６とを備えている。なお、活性炭８やソーダライム１０を収容して活性炭管４、ソーダライム管６を構成する容器はガラス以外の無機素材からなるものであってもよい。   As shown in FIG. 2, the air purifying unit 2 is a carbon dioxide absorption tube 3, for example, a granular activated carbon 8 having a diameter of about 1 to 3 mm in a glass tube having an inner diameter of 10 to 20 mm and a length of about 15 cm. Activated carbon tube 4 in which 20 to 50 g is enclosed, and soda lime tube 6 in which 20 to 50 g of granular soda lime 10 having a diameter of about 1 to 3 mm is enclosed in a glass tube having an inner diameter of 10 to 20 mm and a length of about 15 cm, for example. And. In addition, the container which accommodates the activated carbon 8 and the soda lime 10, and comprises the activated carbon tube 4 and the soda lime tube 6 may consist of inorganic materials other than glass.

活性炭管４及びソーダライム管６のガラス管は一端がキャップによって封止されるとともにその近傍の側壁に突起状の開口部が設けられている。ガラス管の他端にも突起状の開口部が設けられている。これらの突起状の開口部はチューブ１３の穴に挿入され、チューブ１３を介して他の活性炭管４又はソーダライム管６に接続されている。それぞれのガラス管で、上流側の開口部が導入口、下流側の開口部が排出口である。最上流側の活性炭管４の突起状開口部には配管１２ａが挿入され、配管１２ａはポンプ１４に接続されている。最下流側のソーダライム管６の突起状開口部には配管１２ｂが挿入され、配管１２ｂはフィルタ１６に接続されている。活性炭管４、ソーダライム管６はそれぞれ３本ずつ設けられ、最上流部に活性炭管４、最下流部にソーダライム管６がくるように、チューブ１３によって交互に直列に接続されている。   The glass tubes of the activated carbon tube 4 and the soda lime tube 6 are sealed at one end with a cap and provided with a protruding opening on the side wall in the vicinity thereof. A projecting opening is also provided at the other end of the glass tube. These projecting openings are inserted into holes in the tube 13 and connected to another activated carbon pipe 4 or soda lime pipe 6 through the tube 13. In each glass tube, the upstream opening is an inlet, and the downstream opening is a discharge. A pipe 12 a is inserted into the protruding opening of the activated carbon pipe 4 on the most upstream side, and the pipe 12 a is connected to the pump 14. A pipe 12 b is inserted into the protruding opening of the most downstream soda lime pipe 6, and the pipe 12 b is connected to the filter 16. Three activated carbon tubes 4 and three soda lime tubes 6 are provided, and they are alternately connected in series by tubes 13 such that the activated carbon tube 4 comes to the most upstream part and the soda lime pipe 6 comes to the most downstream part.

なお、活性炭管４に封入されている活性炭８は、なるべく活性炭管４に封入される前の段階で二酸化炭素やＴＯＣの吸着量が少なくなるように、予め不活性ガス雰囲気下において５００〜６００℃で２〜３時間焼成したものを用いることが好ましい。また、ソーダライム管６に封入されているソーダライム１０は水分率が２〜１０％程度のものが好ましく、さらにはソーダライム管６に封入されるまでに空気に触れて二酸化炭素を吸着させないように、アルミパウチなどの無機素材によって包装されていたものを用いることが好ましい。   The activated carbon 8 enclosed in the activated carbon tube 4 is preliminarily set to 500 to 600 ° C. in an inert gas atmosphere so that the amount of carbon dioxide and TOC adsorbed is reduced as much as possible before being enclosed in the activated carbon tube 4. It is preferable to use what was baked for 2-3 hours. Further, the soda lime 10 enclosed in the soda lime tube 6 preferably has a moisture content of about 2 to 10%, and further, the carbon dioxide is not adsorbed by touching the air before being enclosed in the soda lime tube 6. In addition, it is preferable to use one packaged with an inorganic material such as an aluminum pouch.

この空気精製装置１において、活性炭管４は主に空気中の有機性ガスの吸着に作用し、ソーダライム管６は主に二酸化炭素の吸着に作用する。   In the air purifying apparatus 1, the activated carbon pipe 4 mainly acts on the adsorption of organic gas in the air, and the soda lime pipe 6 mainly acts on the adsorption of carbon dioxide.

なお、この実施例では活性炭管４とソーダライム管６がそれぞれ３本ずつ設けられて交互に接続されているが、活性炭管４とソーダライム管６の数はそれぞれ１本、２本又は４本以上であってもよい。また、活性炭管４とソーダライム管６が必ずしも交互に接続されていなくともよい。例えば、活性炭管４−活性炭管４−ソーダライム管６―ソーダライム管６と接続したり、ソーダライム管６−活性炭管４−活性炭管４−ソーダライム管６と接続したりすることも可能である。なお、最下流の二酸化炭素吸収管３はソーダライム管６であることが好ましい。活性炭はソーダライムよりも初期の二酸化炭素吸着量が多いため、その二酸化炭素が精製された空気とともにこの空気精製装置１から出ていくのを防止するためである。   In this embodiment, three activated carbon tubes 4 and three soda lime tubes 6 are provided and connected alternately, but the number of activated carbon tubes 4 and soda lime tubes 6 is one, two or four, respectively. It may be the above. Further, the activated carbon pipes 4 and the soda lime pipes 6 are not necessarily connected alternately. For example, it is possible to connect with activated carbon pipe 4-activated carbon pipe 4-soda lime pipe 6-soda lime pipe 6 or soda lime pipe 6-activated carbon pipe 4-activated carbon pipe 4-soda lime pipe 6. is there. The most downstream carbon dioxide absorption pipe 3 is preferably a soda lime pipe 6. This is because activated carbon has a larger initial carbon dioxide adsorption amount than soda lime, so that the carbon dioxide is prevented from leaving the air purifier 1 together with the purified air.

この空気精製装置１は、ポンプ１４により供給された空気を空気精製部２の活性炭管４及びソーダライム管６を順に通過させることにより、空気中に含まれる二酸化炭素やＴＯＣが活性炭８及びソーダライム１０に吸着して除去され、二酸化炭素やＴＯＣの含有量の少ない空気を精製することができる。このように、複数本の活性炭管４及びソーダライム管６とポンプ１４、フィルタ１６だけで構成されている空気精製装置１は、燃焼炉で空気を燃焼した後でソーダライムによって二酸化炭素を吸収させる方式の空気精製装置よりも小型であるとともに安価であり、ＴＯＣ測定装置などの装置の大きさを増大化させることなく組み込むことができる。   This air purifying apparatus 1 allows the air supplied by the pump 14 to pass through the activated carbon pipe 4 and the soda lime pipe 6 of the air purifying unit 2 in order, so that carbon dioxide and TOC contained in the air are activated carbon 8 and soda lime. Thus, it is possible to purify air that is adsorbed and removed by 10 and has a low content of carbon dioxide and TOC. As described above, the air purifying apparatus 1 including only the plurality of activated carbon tubes 4 and soda lime tubes 6, the pump 14, and the filter 16 absorbs carbon dioxide by soda lime after burning air in the combustion furnace. It is smaller and less expensive than a conventional air purification device, and can be incorporated without increasing the size of a device such as a TOC measuring device.

上記の空気精製装置１を用いたＴＯＣ測定装置の一例を図３により説明する。
流路を切り替えるための切替えバルブ２０は中央に設けられた共通のポートと、共通のポートに切り替えて接続される複数のポートを備えている。切替えバルブ２０の共通のポートにはシリンジ１４が接続され、共通のポートに切り替えて接続されるポートに試料流路２２、酸供給流路２４、ドレイン流路２６、及び酸化反応部３０へ繋がる測定流路２８がそれぞれ接続されている。酸化反応部３０はＣＯ2検出部３２に接続されている。シリンジ１４は吸引・吐出口が上方を向き、プランジャ１６が上下方向に摺動するように配置されている。シリンジ１４内部の空間の下部に空気精製装置１が配管１２を介して接続されており、プランジャ１６が配管の接続位置よりも下方にあるときに空気精製装置１からの空気がシリンジ１４内に供給されるように構成されている。 An example of the TOC measuring apparatus using the air purifying apparatus 1 will be described with reference to FIG.
The switching valve 20 for switching the flow path includes a common port provided in the center and a plurality of ports that are connected to the common port. The syringe 14 is connected to the common port of the switching valve 20, and the measurement is connected to the sample channel 22, the acid supply channel 24, the drain channel 26, and the oxidation reaction unit 30 by switching to the common port. The flow paths 28 are connected to each other. The oxidation reaction unit 30 is connected to the CO 2 detection unit 32. The syringe 14 is disposed such that the suction / discharge port faces upward and the plunger 16 slides in the vertical direction. The air purifier 1 is connected to the lower part of the space inside the syringe 14 via the pipe 12, and the air from the air purifier 1 is supplied into the syringe 14 when the plunger 16 is below the connection position of the pipe. It is configured to be.

このＴＯＣ測定装置では、まずシリンジ１４と試料流路２２とを接続するように切替えバルブ２０を切り替え、プランジャ１６を配管１２との接続位置よりも下にある状態で、プランジャ１６を吸引側へ駆動してシリンジ１４内に試料を吸引する。次に、シリンジ１４と酸供給流路２４とを接続とを接続するように切替えバルブ２０を切り替え、プランジャ１６をさらに吸引側へ駆動してシリンジ１４の試料に酸を加える。   In this TOC measuring device, first, the switching valve 20 is switched so as to connect the syringe 14 and the sample flow path 22, and the plunger 16 is driven to the suction side in a state where the plunger 16 is below the connection position with the pipe 12. The sample is sucked into the syringe 14. Next, the switching valve 20 is switched so as to connect the syringe 14 and the acid supply channel 24, and the plunger 16 is further driven to the suction side to add acid to the sample of the syringe 14.

シリンジ１４とドレイン流路２６とを接続するように切替えバルブ２０を切り替え、シリンジ１４内に空気精製装置１から通気ガスを供給し、シリンジ１４内で試料の通気処理を行なう。この通気処理により、試料中の二酸化炭素がドレイン流路２６を介して外部へ排出される。通気処理が終了した後、シリンジ１４内の上部の気相をドレイン流路２６から排出するようにプランジャ１６を吐出側へ駆動した後、シリンジ１４と測定流路２８とを接続するように切替えバルブ２０を切り替え、プランジャ１６をさらに吐出側へ駆動して試料を酸化反応部３０に注入する。   The switching valve 20 is switched so as to connect the syringe 14 and the drain flow path 26, the aeration gas is supplied from the air purifier 1 into the syringe 14, and the sample is aerated in the syringe 14. By this aeration treatment, carbon dioxide in the sample is discharged to the outside through the drain channel 26. After the aeration process is completed, the plunger 16 is driven to the discharge side so that the upper gas phase in the syringe 14 is discharged from the drain channel 26, and then the switching valve is connected so as to connect the syringe 14 and the measurement channel 28. 20 is switched, and the plunger 16 is further driven to the discharge side to inject the sample into the oxidation reaction unit 30.

酸化反応部３０を経た試料はＣＯ2検出部３２に導入される。酸化反応部３０では注入された試料中の全有機体炭素が二酸化炭素に変換され、ＣＯ2検出部３２では全有機体炭素から変換された二酸化炭素の濃度が検出される。試料における全有機体炭素濃度とＣＯ2検出部３２による二酸化炭素濃度の検出値は予め検量線により関係付けられており、試料の二酸化炭素濃度を検出することで全有機体炭素濃度を測定することができる。 The sample that has passed through the oxidation reaction unit 30 is introduced into the CO 2 detection unit 32. The oxidation reaction unit 30 converts all organic carbon in the injected sample into carbon dioxide, and the CO 2 detection unit 32 detects the concentration of carbon dioxide converted from the total organic carbon. The total organic carbon concentration in the sample and the detected value of the carbon dioxide concentration by the CO 2 detector 32 are related in advance by a calibration curve, and the total organic carbon concentration is measured by detecting the carbon dioxide concentration of the sample. Can do.

同実施例のＴＯＣ測定装置（＜実施例＞と表す）と、同実施例の空気精製装置１に代えて高純度空気ボンベを用いたＴＯＣ測定装置（＜比較例＞と表す）を用いて、純水を試料として空気精製装置１又は高純度空気ボンベの温度（精製カラム温度と表す）を７℃、２５℃、４０℃にしたときのＴＯＣ測定を１ヶ月（３１日）間行なった結果を表１に示す。測定条件は、通気ガス供給流量１００ｍｌ／ｍｉｎ、１回の測定での通気時間９０秒、試料量２０００μＬであった。   Using the TOC measuring device (represented as <Example>) of the same example and the TOC measuring device (represented as <Comparative example>) using a high-purity air cylinder instead of the air purifier 1 of the same example, Results of TOC measurement for 1 month (31 days) when the temperature of the air purifier 1 or high-purity air cylinder (represented as the purification column temperature) is 7 ° C, 25 ° C, 40 ° C using pure water as a sample. Table 1 shows. The measurement conditions were an aeration gas supply flow rate of 100 ml / min, an aeration time of 90 seconds in one measurement, and a sample amount of 2000 μL.

Figure 0005429014
Figure 0005429014

表１に示されているように、精製カラム温度が７℃、２５℃、４０℃のいずれの場合においても、実施例と比較例の測定値との差が１ｐｐｂ以下であった。ＴＯＣ測定装置における測定値の許容誤差は純水測定時における１ｐｐｂ以下であるとされており、上記の測定結果はいずれの精製カラム温度においてもこの条件を満たしている。このことから、実施例の空気精製装置１はＴＯＣ測定装置での１ヶ月間の使用にも耐えうる性能を有するものであることを確認することができた。   As shown in Table 1, when the purification column temperature was 7 ° C., 25 ° C., or 40 ° C., the difference between the measured values of the example and the comparative example was 1 ppb or less. The tolerance of the measured value in the TOC measuring device is assumed to be 1 ppb or less at the time of pure water measurement, and the above measurement result satisfies this condition at any purification column temperature. From this, it was confirmed that the air purifying apparatus 1 of the example had a performance that could withstand use for one month in the TOC measuring apparatus.

１ 空気精製装置
２ 空気精製部
３ 二酸化炭素吸収管
４ 活性炭管
６ ソーダライム管
８ 活性炭
１０ ソーダライム
１２ 配管
１３ チューブ
１４ シリンジ
１６ プランジャ
２０ 切替えバルブ
２２ 試料流路
２４ 酸供給流路
２６ ドレイン流路
２８ 測定流路
３０ 酸化反応部
３２ ＣＯ2検出部 DESCRIPTION OF SYMBOLS 1 Air purification apparatus 2 Air purification part 3 Carbon dioxide absorption pipe 4 Activated carbon pipe 6 Soda lime pipe 8 Activated carbon 10 Soda lime 12 Pipe 13 Tube 14 Syringe 16 Plunger 20 Switching valve 22 Sample flow path 24 Acid supply flow path 26 Drain flow path 28 Measurement channel 30 Oxidation reaction section 32 CO 2 detection section

Claims (3)

粒状のソーダライムを導入口と排出口を有する容器内に充填したソーダライム管と粒状の活性炭を導入口と排出口を有する容器内に充填した活性炭管とをそれぞれ２つ以上備え、ソーダライム管と活性炭管が交互に配置されて直列に接続された空気精製部を備え、空気を前記空気精製部の前記ソーダライム管及び活性炭管に通すことにより精製する空気精製装置。 A soda lime tube having two or more soda lime tubes filled with granular soda lime in a container having an inlet and an outlet and an activated carbon tube filled with granular activated carbon in a container having an inlet and an outlet. And an activated carbon pipe are alternately arranged and connected in series, and the air purifier purifies the air by passing through the soda lime pipe and the activated carbon pipe of the air purification section. 前記空気精製部の最下流部にはソーダライム管が接続されている請求項１に記載の空気精製装置。   The air purification apparatus according to claim 1, wherein a soda lime pipe is connected to the most downstream portion of the air purification unit. 通気ガスを試料水中で通気することにより試料水中に含まれる二酸化炭素を通気ガスによる通気処理により除去する二酸化炭素除去部、二酸化炭素除去部を経た試料水中の有機体炭素を二酸化炭素に変換する酸化反応部及び酸化反応部を経た試料水中の二酸化炭素濃度を計測する二酸化炭素計測部を備えた全有機体炭素測定装置において、
前記二酸化炭素除去部に請求項１又は２に記載の空気精製装置が接続されており、前記空気精製装置で精製された空気が前記通気ガスとして試料水中に供給される全有機体炭素測定装置。 A carbon dioxide removal part that removes carbon dioxide contained in the sample water by aeration treatment with the aeration gas by aeration of the aeration gas in the sample water, and an oxidation that converts the organic carbon in the sample water that has passed through the carbon dioxide removal part to carbon dioxide In the total organic carbon measuring device equipped with a carbon dioxide measuring unit that measures the carbon dioxide concentration in the sample water that has passed through the reaction unit and the oxidation reaction unit,
An all-organic carbon measuring device, wherein the air purifier according to claim 1 or 2 is connected to the carbon dioxide removing unit, and the air purified by the air purifier is supplied as sample gas into the sample water.
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