JPH0291569A - Instrument for measuring carbon content - Google Patents
Instrument for measuring carbon contentInfo
- Publication number
- JPH0291569A JPH0291569A JP24518588A JP24518588A JPH0291569A JP H0291569 A JPH0291569 A JP H0291569A JP 24518588 A JP24518588 A JP 24518588A JP 24518588 A JP24518588 A JP 24518588A JP H0291569 A JPH0291569 A JP H0291569A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- sample water
- inorganic
- total
- sample
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 141
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 45
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 45
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000012295 chemical reaction liquid Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 abstract description 7
- 238000009279 wet oxidation reaction Methods 0.000 abstract description 4
- 229960004424 carbon dioxide Drugs 0.000 description 37
- 239000007789 gas Substances 0.000 description 10
- 239000011261 inert gas Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 238000002203 pretreatment Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000011410 subtraction method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、酸化剤を用いた湿式酸化方式のＴＯＣ（Ｔ
ＯＴＡＬ ０ＲＧＡＮＩＣＣＡＲＢＯ’Ｎ）分析計に係
り、特に有機炭素量を高い精度で検出できる炭素量測定
装置に関するものである。Detailed Description of the Invention "Field of Industrial Application" This invention is a wet oxidation type TOC (TOC) using an oxidizing agent.
The present invention relates to an OTAL 0RGANICCARBO'N) analyzer, and particularly to a carbon amount measuring device that can detect the amount of organic carbon with high accuracy.
「従来の技術」
この種の有機炭素量の測定装置としては、特願昭５９−
６．４７６９号公報に示される、無機炭素と有機炭素と
が含有される試料水を酸性下においてバブリング処理し
て、実際に試料水中の無機炭素（Ｉ Ｃ）を除去した後
で有機炭素（ＴＯＣ）を定量する前処理法が採用された
ものが従来から知られている。``Prior art'' This type of organic carbon content measuring device is
6.4769, a sample water containing inorganic carbon and organic carbon is subjected to bubbling treatment under acidic conditions to actually remove inorganic carbon (IC) from the sample water, and then organic carbon (TOC) is removed. ) has been known in the past in which a pretreatment method for quantifying
具体的には、この有機炭素量の測定装置では、有機炭素
、無機炭素が含有された試料水中に、ベルオキソニ硫酸
カリウム等の酸化剤と、硫酸等の強酸とを共に添加１−
だ後、前記試料水にヘリウム、窒素などの不活性ガスを
送り込んで、該試料水をバブリングし、これによって、
まず、試料水中に溶存する二酸化炭素としての無機炭素
を外部に追い出し、次に、前記試料水を高圧下で加熱す
ることによって、該試料水中に残る有機炭素を酸化して
二酸化炭素に転換させるようにしている。そして、前記
有機炭素から得られた二酸化炭素は定量され、この定量
結果から、前記試料水中の有機炭素量が演算されるよう
になっている。Specifically, in this organic carbon amount measuring device, an oxidizing agent such as potassium belloxonisulfate and a strong acid such as sulfuric acid are added together to a sample water containing organic carbon and inorganic carbon.
After that, an inert gas such as helium or nitrogen is introduced into the sample water to bubble the sample water, thereby
First, inorganic carbon as carbon dioxide dissolved in the sample water is expelled to the outside, and then the sample water is heated under high pressure to oxidize the organic carbon remaining in the sample water and convert it into carbon dioxide. I have to. Then, the carbon dioxide obtained from the organic carbon is quantified, and the amount of organic carbon in the sample water is calculated from the quantification result.
「発明が解決しようとする課題」
ところで、上記のように構成された有機炭素量の測定装
置によれば、有機炭素を測定する前工程として、無機炭
素の除去を行うようにしているが、この無機炭素の除去
は、試料水をバブリングすることによって行われるもの
であるので、無機炭素が除去される際に、除去してはな
らない揮発性の有機物、例えばエーテル類あるいは水に
対する親和力の比較的小さいアルコール類、ケトン類な
ども蒸発、飛散してしまい、これによって、正確な有機
炭素量の測定ができないという不具合があった。"Problem to be Solved by the Invention" By the way, according to the organic carbon content measuring device configured as described above, inorganic carbon is removed as a pre-process to measuring organic carbon. Removal of inorganic carbon is carried out by bubbling sample water, so when inorganic carbon is removed, volatile organic substances that must not be removed, such as ethers or water, have a relatively low affinity. Alcohols, ketones, etc. also evaporated and scattered, which caused the problem that accurate measurement of organic carbon content was not possible.
この発明は、上記の事情に鑑みてなされたものであって
、試料水中の全炭素（ＴＣ）と無機炭素（ＩＣ）とをそ
れぞれ定量し、その定量値の差（ＴＣ−ＩＣ）から有機
炭素（ＴＯＣ）の量を演算する方式（差し引き法）を採
用して、途中に、有機炭素が含有された試料水をバブリ
ングするといった処理を行わず、これによって、揮発性
の有機物を蒸発させることなく有機炭素の測定を高い精
度で行うことが可能な炭素量測定装置の提供を目的とす
る。This invention was made in view of the above-mentioned circumstances. Total carbon (TC) and inorganic carbon (IC) in sample water are each quantified, and organic carbon is determined from the difference between the quantitative values (TC-IC). By using a method (subtraction method) to calculate the amount of (TOC), we do not perform any process such as bubbling sample water containing organic carbon, thereby eliminating the need to evaporate volatile organic matter. The purpose of the present invention is to provide a carbon amount measuring device that can measure organic carbon with high accuracy.
「課題を解決するための手段」
上記の目的を達成するために、本発明では、有機炭素、
無機炭素が含有された試料水を供給する試料供給手段と
、この試料供給手段によって供給された試料水を、全炭
素量を測定する全炭素測定系、無機炭素量を測定する無
機炭素測定系にそれぞれ分配する分配手段とを設けると
ともに、前記全炭素測定系に、無機炭素及び有機炭素を
二酸化炭素に変換するｔ；めの第１の反応液を、試料水
中に添加する第１の反応液添加手段と、前記第１の反応
液が添加された試料水を加圧状態で加熱して、該試料水
中の有機炭素及び無機炭素から二酸化炭素を生成させる
全炭素用変換手段とを設け、更に、前記無機炭素測定系
に、無機炭素を二酸化炭素に変換するための第２の反応
液を、試料水中に添加する第２の反応液添加手段と、前
記第２の反応液が添加された試料水を加熱して、該試料
水中の無機炭素から二酸化炭素を生成させる無機炭素用
変換手段とを設け、また更に、これら全炭素測定系と無
機炭素測定系とに、全炭素用変換手段と無機炭素用変換
手段において生成された二酸化炭素を定量する定量手段
と、この定量手段の検出値から、前記試料中に含有され
る有機炭素濃度を演算する演算手段とを設けるようにし
ている。"Means for Solving the Problem" In order to achieve the above object, the present invention uses organic carbon,
A sample supply means for supplying sample water containing inorganic carbon, and a total carbon measurement system for measuring the total carbon content and an inorganic carbon measurement system for measuring the inorganic carbon content. a first reaction solution addition step for adding a first reaction solution for converting inorganic carbon and organic carbon to carbon dioxide into the sample water; and a total carbon conversion means for heating the sample water to which the first reaction liquid has been added under pressure to generate carbon dioxide from the organic carbon and inorganic carbon in the sample water, further comprising: A second reaction liquid addition means for adding a second reaction liquid for converting inorganic carbon into carbon dioxide to the sample water in the inorganic carbon measurement system, and a sample water to which the second reaction liquid has been added. A converting means for inorganic carbon is provided to generate carbon dioxide from the inorganic carbon in the sample water by heating, and further, a converting means for total carbon and an inorganic carbon converting means are provided in the total carbon measuring system and the inorganic carbon measuring system. A quantitative means for quantifying carbon dioxide produced in the conversion means, and a calculation means for calculating the concentration of organic carbon contained in the sample from the detected value of the quantitative means are provided.
「作用」
この発明によれば、全炭素測定系において全炭素から生
成された二酸化炭素と、無機炭素測定系において無機炭
素から生成された二酸化炭素とを定量し、これら定量値
の差を採ることによって、試料水中に含有される有機炭
素量、更には試料中の有機炭素濃度を測定することがで
きる。"Operation" According to the present invention, carbon dioxide generated from total carbon in the total carbon measurement system and carbon dioxide generated from inorganic carbon in the inorganic carbon measurement system are quantified, and the difference between these quantitative values is taken. Accordingly, the amount of organic carbon contained in the sample water and further the organic carbon concentration in the sample can be measured.
そして、このような有機炭素濃度は、特に、途中に、有
機炭素が含有された試料水をバブリングするといった処
理を施さず測定されるものであるので、従来行われてい
た前処理法によるＴＯＣ分析計と゛比較して、その測定
誤差を小さくできる。Since such organic carbon concentration is measured without any process such as bubbling sample water containing organic carbon, TOC analysis using the conventional pretreatment method is not possible. The measurement error can be reduced compared to a meter.
「実施例」
本発明の一実施例を第１図及び第２図を参照して説明す
る。"Embodiment" An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
まず、第１図において符号ｌで示すものは、有機炭素、
無機炭素（無機塩類）が含有された試料水を供給する試
料供給手段であって、純水配管（図示略）に直接接続さ
れる試料導入ライン２と、容器３内に貯留された試料水
を、前記試料導入ライン２に必要に応じて供給するため
の切換弁４と、前記純水配管または容器３から供給され
た試料水を輸送する試料水供給ポンプ５とから構成され
たものである。First, what is indicated by the symbol l in Fig. 1 is organic carbon,
A sample supply means for supplying sample water containing inorganic carbon (inorganic salts), which includes a sample introduction line 2 directly connected to a pure water pipe (not shown) and a sample water stored in a container 3. , a switching valve 4 for supplying sample water to the sample introduction line 2 as necessary, and a sample water supply pump 5 for transporting sample water supplied from the pure water pipe or container 3.
なお、前記試料水に含有される無機炭素としては、例え
ば、溶存炭酸ガスＣＯ８の外、炭酸イオンｃ ｏ ３”
−１炭酸水素イオンＨＣＯ３−などからなる無機塩類が
ある。Inorganic carbon contained in the sample water includes, for example, dissolved carbon dioxide gas CO8, carbonate ion co3''
-1 There are inorganic salts consisting of hydrogen carbonate ion HCO3- and the like.
そして、前記試料水供給ポンプ５によって供給された試
料水は、分岐部６（分配手段）を経由して、それぞれ全
炭素量を測定する全炭素測定系Ａと無機炭素量を測定す
る無機炭素測定系Ｂとに分配されるようになっている。The sample water supplied by the sample water supply pump 5 passes through a branching section 6 (distribution means) to a total carbon measurement system A that measures the total carbon content and an inorganic carbon measurement system that measures the inorganic carbon content. It is designed to be distributed to system B.
前者の全炭素測定系Ａは、分岐部６によって分配された
試料水に対して、貯留部７に貯留されｔ；反応液（第１
の反応液）を供給する反応液供給ポンプ８（第１の反応
液添加手段）と、前記反応液と試料水との混合液を供給
する加圧ポンプ９と、内部に絞り（図示路）と熱源とを
有し、前記加圧ポンプ９によって供給された前記混合液
を加圧状態で加熱する反応器１０（全炭素用変換手段）
と、この反応器１０において生成された二酸化炭素（後
述すル）ヲ、マスプローコントａ−ラ１１を通じて供給
された不活性ガスメこより抽出する抽出器１２とから構
成されたものである。The former total carbon measuring system A stores the sample water distributed by the branching part 6 in the storage part 7;
a reaction solution supply pump 8 (first reaction solution addition means) that supplies a reaction solution (reaction solution), a pressure pump 9 that supplies a mixed solution of the reaction solution and sample water, and an internal constriction (path shown). a reactor 10 (total carbon conversion means) having a heat source and heating the mixed liquid supplied by the pressure pump 9 under pressure;
and an extractor 12 for extracting carbon dioxide (described later) produced in the reactor 10 from an inert gas supplied through a mass flow controller 11.
なお、前記貯留部７に貯留される反応液は、試料水中の
無機炭素を二酸化炭素として遊離させる硫酸等の酸と、
試料水中の有機炭素を酸化して二酸化炭素を生成させる
ベルオキソニ硫酸カリウム等の酸化剤とが混合されたも
のである。また、前記反応器ｌＯにおいて設定される圧
力は２０〜３０気圧；温度は２００℃前後が適当である
。The reaction liquid stored in the storage section 7 contains an acid such as sulfuric acid that liberates inorganic carbon in the sample water as carbon dioxide,
It is mixed with an oxidizing agent such as potassium beroxonisulfate, which oxidizes the organic carbon in the sample water to generate carbon dioxide. Further, the pressure set in the reactor IO is suitably 20 to 30 atm; the temperature is suitably about 200°C.
また、前記抽出器１２は、不活性ガスが下から上に向け
て流通する抽出塔（図示路）と、この抽出塔内に、前記
反応器１０を経由して二酸化炭素が含有されてなる高温
の試料水を霧状に噴き出させるノズル（図示路）と、前
記抽出塔を冷却する冷却器（図示路）とを備えたもので
あり、前記抽出塔内では、ノズルから噴出した試料水が
復水し、該試料水から二酸化炭素のみが気液分離されて
抽出できるようになっている。Further, the extractor 12 includes an extraction tower (shown in the diagram) through which an inert gas flows from bottom to top, and a high-temperature structure in which carbon dioxide is contained in the extraction tower via the reactor 10. The system is equipped with a nozzle (shown in the diagram) that spouts sample water in the form of a mist, and a cooler (shown in the diagram) that cools the extraction tower.In the extraction tower, the sample water jetted from the nozzle is Water is condensed, and only carbon dioxide can be extracted from the sample water through gas-liquid separation.
そして、前記抽出器１２から抽出された気体である二酸
化炭素は、不活性ガスとともに配管１２Ａに供給されて
、後述する赤外線ガス分析計において定量分析がなされ
、一方、二酸化炭素が抽出された後の液体である試料水
は、ドレンとして配管１２Ｂに送られて、ドレンタンク
（図示路）に排出されるようになっている。Carbon dioxide, which is a gas extracted from the extractor 12, is supplied to a pipe 12A together with an inert gas, and quantitatively analyzed in an infrared gas analyzer, which will be described later. The sample water, which is a liquid, is sent to the pipe 12B as a drain and is discharged into a drain tank (the illustrated path).
次に、無機炭素測定系Ｂについて説明すると、この無機
炭素測定系Ｂが前述した全炭素測定系Ａと構成を異にす
る点は、符号１５で示す貯留部に貯留される反応液（第
２の反応液）の種類と、符号１６で示す反応器（無機炭
素用変換手段）において設定される温度である。また、
符号１７．１８．１９．２０でそれぞれ示す反応器供給
ポンプ（第２の反応液添加手段）、加圧ポンプ、マスプ
ローコントローラ、抽出器については、前記反応器供給
ポンプ８、加圧ポンプ９、マス７０−コントローラ１１
、抽出器１２と同一の仕様のものが用いうしており、マ
ス２０−コントａ−ラ１１と１９とは同一の流量に設定
されている。これにより、無機炭素測定系Ｂには常に全
炭素測定系Ａと同じ状態の試料水が同時に供給されるよ
うになっている。Next, inorganic carbon measurement system B will be explained. The difference between this inorganic carbon measurement system B and the above-mentioned total carbon measurement system A is that the reaction liquid (second (reaction liquid) and the temperature set in the reactor (conversion means for inorganic carbon) shown by reference numeral 16. Also,
Regarding the reactor supply pump (second reaction liquid addition means), pressurization pump, mass blow controller, and extractor indicated by reference numerals 17, 18, 19, and 20, respectively, the reactor supply pump 8, pressure pump 9, Mass 70-controller 11
, the same specifications as the extractor 12 are used, and the mass 20-controllers 11 and 19 are set to the same flow rate. Thereby, sample water in the same state as the total carbon measuring system A is always supplied to the inorganic carbon measuring system B at the same time.
前記貯留部１５に貯留される反応液は、試料水中の無機
炭素を二酸化炭素として遊離させる硫酸等の酸が含有さ
れたものであって、試料水供給ポンプ５によって送られ
た試料水の水素イオン濃度をｐＨ２以下に設定するもの
である。また、前記反応器１６における反応温度は、１
００〜１５０℃の範囲、特に１２０℃に設定することが
好ましい。上述した反応条件にすることにより炭酸イオ
ン、炭酸水素イオンなどの無機炭素のみから二酸化炭素
を生成し、有機炭素から二酸化炭素が生成されることが
ない。The reaction liquid stored in the storage section 15 contains an acid such as sulfuric acid that liberates inorganic carbon in the sample water as carbon dioxide, and contains hydrogen ions in the sample water sent by the sample water supply pump 5. The concentration is set to pH 2 or less. Further, the reaction temperature in the reactor 16 is 1
It is preferable to set the temperature in the range of 00 to 150°C, particularly 120°C. By using the above reaction conditions, carbon dioxide is produced only from inorganic carbon such as carbonate ions and hydrogen carbonate ions, and carbon dioxide is not produced from organic carbon.
そして、この無機炭素測定系Ｂでは、上述した如く、無
機炭素のみから二酸化炭素が生成されるとともに、試料
水中にもともと含まれている二酸化炭素と合わせての二
酸化炭素が、抽出器２ｏにおいて試料水から気液分離さ
れた後、前記マスフローコントローラ１９を通じて供給
された不活性ガスとともに配管２０Ａに供給される。ま
た、前記二酸化炭素が抽出された後のドレン水は、配管
２０Ｂを通じてドレンタンク（図示略）に排出されるよ
うになっている。In this inorganic carbon measurement system B, as mentioned above, carbon dioxide is generated only from inorganic carbon, and the carbon dioxide together with the carbon dioxide originally contained in the sample water is extracted from the sample water in the extractor 2o. After being separated into gas and liquid, the gas is supplied to the pipe 20A together with the inert gas supplied through the mass flow controller 19. Moreover, the drain water after the carbon dioxide has been extracted is discharged into a drain tank (not shown) through a pipe 20B.
そして、上述したように全炭素から生成された二酸化炭
素、無機炭素から生成された二酸化炭素は、前記配管１
２Ａ、２０Ａを通じて除湿除塵器２１に供給されて、不
純物が取り除かれた後、更に、配管１２Ａ’ ２０Ａ
’を通じて、流通差動型と称される非分散型の赤外線ガ
ス分析計２２（定量手段）に供給されるようになってい
る。As mentioned above, carbon dioxide generated from total carbon and carbon dioxide generated from inorganic carbon are
After being supplied to the dehumidifying and dust remover 21 through 2A and 20A to remove impurities, it is further supplied to the pipes 12A' and 20A.
' is supplied to a non-dispersive type infrared gas analyzer 22 (quantification means) called a flow differential type.
この赤外線ガス分析計２２は、第２図に示すように、配
’１ｒ１２Ａ’を通じて供給された二酸化炭素を含む不
活性ガスが導入される試料セル２２Ａと、配管２０八′
を通じて供給されＩ；二酸化炭素を含む不活性ガスが導
入される基準セル２３と、赤外線光源２４からの赤外線
を分配して、前記試料セル２２Ａ１基準セル２３に送る
分配セル２５と、赤外線光源２４からの赤外線を間欠的
に遮断する回転セクタ２６と、前記試料セル２２Ａ１基
準セル２３を通過した赤外線のスペクトル強度を検出す
ることによって、不活性ガス中に含有される二酸化炭素
を定量する検出部２７とが具備されたものであって、前
記検出部２７で得られた定量値を示す定量データは、演
算手段２８に供給され、この演算手段２８において、全
炭素から生成された二酸化炭素の定量値から、無機炭素
から生成された二酸化炭素の定量値を減算し、減算値か
ら、試料水中に含有される有機炭素（ＴＯＣ）の濃度を
演算するようになっている。This infrared gas analyzer 22, as shown in FIG.
a reference cell 23 into which an inert gas containing carbon dioxide is introduced; a distribution cell 25 that distributes infrared rays from an infrared light source 24 and sends them to the sample cell 22A1 reference cell 23; a rotating sector 26 that intermittently blocks infrared rays; a detection unit 27 that quantifies carbon dioxide contained in the inert gas by detecting the spectral intensity of the infrared rays that have passed through the sample cell 22A1 reference cell 23; The quantitative data indicating the quantitative value obtained by the detection unit 27 is supplied to the calculating means 28, and the calculating means 28 calculates the quantitative value from the quantitative value of carbon dioxide generated from the total carbon. , the quantitative value of carbon dioxide produced from inorganic carbon is subtracted, and the concentration of organic carbon (TOC) contained in the sample water is calculated from the subtracted value.
そし′て、上記のように演算された有機炭素濃度、全炭
素濃度、無機炭素濃度は、必要に応じて表示手段２９１
こ表示されるようになっている。Then, the organic carbon concentration, total carbon concentration, and inorganic carbon concentration calculated as described above are displayed on the display means 291 as necessary.
This is now displayed.
以上説明したように、上記のように構成された炭素量測
定装置においては、全炭素測定系Ａにおいて得られた二
酸化炭素と、無機炭素測定系Ｂにおいて得られた二酸化
炭素とをそれぞれ定量し、これら定量値の差を採ること
によって、試料水中の有機炭素濃度を演算するようにし
たが、このようにして得られた有機炭素濃度は、従来の
ように、実際に無機炭素を酸性下でバグリングによって
除去した後に、有機炭素を酸化するようにしたいわゆる
前処理方式と異なり、試料水中の全炭素濃度と無機炭素
濃度とをそのまま測定する差し引き法を採用したもので
あるので、前者の方式を採用した場合に、バブリングに
よって追い出されるはずの有機炭素（エーテル類あるい
は水に対する親和力の比較的小さいアルコール類、ケト
ン類）がそのまま試料水中に残り、これによって、従来
の方式のものと比較してその測定誤差を小さくシ、測定
精度向上を図ることが可能である。As explained above, in the carbon amount measurement device configured as above, carbon dioxide obtained in total carbon measurement system A and carbon dioxide obtained in inorganic carbon measurement system B are respectively quantified, By taking the difference between these quantitative values, we calculated the organic carbon concentration in the sample water. Unlike the so-called pre-treatment method in which organic carbon is oxidized after removal with a ring, the former method is preferable because it uses a subtraction method that directly measures the total carbon concentration and inorganic carbon concentration in the sample water. When this method is adopted, organic carbon (ethers or alcohols and ketones with a relatively small affinity for water) that should be expelled by bubbling remains in the sample water, which results in a lower It is possible to reduce measurement errors and improve measurement accuracy.
つまり、上記のような酸化剤を用いた湿式酸化方式の炭
素量測定装置において、差し引き法を採用した高精度の
有機炭素濃度の分析を行うことが可能である。That is, in a wet oxidation type carbon content measurement device using an oxidizing agent as described above, it is possible to perform highly accurate analysis of organic carbon concentration using a subtraction method.
また、前記有機炭素濃度の分析は、試料水を分岐部６に
よって全炭素測定系Ａと無機炭素測定系Ｂとに分配して
、個別に全炭素及び無機炭素から二酸化炭素をそれぞれ
生成し、これら二酸化炭素を赤外線ガス分析計２２に順
次導入することによって、全炭素の濃度と無機炭素の濃
度とを連続的に演算し、この演算結果から、試料水中に
含有される有機炭素濃度を連続的に演算することが可能
であり、これによって有機炭素濃度の測定を効率良く行
うことが可能である。In addition, in the analysis of the organic carbon concentration, the sample water is divided into the total carbon measurement system A and the inorganic carbon measurement system B by the branching section 6, and carbon dioxide is generated from the total carbon and inorganic carbon respectively. By sequentially introducing carbon dioxide into the infrared gas analyzer 22, the concentration of total carbon and the concentration of inorganic carbon are continuously calculated, and from this calculation result, the concentration of organic carbon contained in the sample water is continuously calculated. This allows efficient measurement of organic carbon concentration.
「発明の効果」
以上詳細に説明したように、この発明によれば、全炭素
測定系において全炭素から生成された二酸化炭素と、無
機炭素測定系において無機炭素のみから生成された二酸
化炭素とを定量し、これら定量値の差を採ることによっ
て、試料水中に含有される有機炭素濃度を演算すること
ができ、かつ、このような有機炭素濃度は、特に、途中
に有機炭素が含有された試料水をバブリングするといっ
た処理を施さず測定されるものであるので、従来行われ
ていた前処理法が採用された湿式酸化法のＴＯＣ分析計
と比較して、その測定誤差を小さくし、測定精度向上を
図ることが可能である。"Effects of the Invention" As explained in detail above, according to the present invention, carbon dioxide generated from all carbon in the total carbon measurement system and carbon dioxide generated only from inorganic carbon in the inorganic carbon measurement system are separated. By quantifying and taking the difference between these quantitative values, it is possible to calculate the concentration of organic carbon contained in the sample water. Since the measurement is performed without any treatment such as bubbling water, the measurement error is reduced and the measurement accuracy is improved compared to the conventional TOC analyzer using the wet oxidation method, which uses a pretreatment method. It is possible to improve this.
第１図及び第２図は本発明の一実施例を示す図であって
、第１図はその全体を示す概略構成図、第２図は赤外線
ガス分析計の構成を示す概略構成図である。
ｌ・・・・・・試料供給手段、６・・・・・・分岐部（
分配手段）、８・・・・・・試料液供給ポンプ（第１の
反応液供給手段）、１０・・・・・・反応器（全炭素用
変換手段）、１６・・・・・・反応器（無機炭素用変換
手段）、１７・・・・・・試料液供給ポンプ（第２の反
応液供給手段）、２２・・・・・・赤外線ガス分析計（
定量手段）、２８・・・・・・演算手段。1 and 2 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a schematic diagram showing the entire structure, and FIG. 2 is a schematic diagram showing the structure of an infrared gas analyzer. . l... Sample supply means, 6... Branch part (
distribution means), 8... sample liquid supply pump (first reaction liquid supply means), 10... reactor (total carbon conversion means), 16... reaction 17... sample liquid supply pump (second reaction liquid supply means), 22... infrared gas analyzer (
quantitative means), 28... calculation means.
Claims (1)
供給手段と、この試料供給手段によって供給された試料
水を、全炭素量を測定する全炭素測定系と無機炭素量を
測定する無機炭素測定系とにそれぞれ分配する分配手段
とが設けられてなり、前記全炭素測定系には、無機炭素
及び有機炭素を二酸化炭素に変換するための第１の反応
液を、試料水中に添加する第１の反応液添加手段と、前
記第１の反応液が添加された試料水を加圧状態で加熱し
て、該試料水中の有機炭素及び無機炭素から二酸化炭素
を生成させる全炭素用変換手段とが設けられ、 また、前記無機炭素測定系には、無機炭素を二酸化炭素
に変換するための第２の反応液を、試料水中に添加する
第２の反応液添加手段と、前記第２の反応液が添加され
た試料水を加熱して、該試料水中の無機炭素から二酸化
炭素を生成させる無機炭素用変換手段とが設けられ、 更に、これら全炭素測定系と無機炭素測定系とには、全
炭素用変換手段と無機炭素用変換手段とにおいて生成さ
れた二酸化炭素を定量する定量手段と、この定量手段の
検出値から、前記試料中に含有される有機炭素量を演算
する演算手段とが設けられていることを特徴とする炭素
量測定装置。[Claims] A sample supply means for supplying sample water containing organic carbon and inorganic carbon, a total carbon measuring system for measuring the total carbon content of the sample water supplied by the sample supply means, and an inorganic carbon an inorganic carbon measuring system for measuring the amount of carbon dioxide; and a distributing means for distributing the total carbon to each of the total carbon measuring systems; A first reaction liquid addition means added to the sample water and heating the sample water to which the first reaction liquid has been added under pressure to generate carbon dioxide from the organic carbon and inorganic carbon in the sample water. A conversion means for total carbon is provided, and the inorganic carbon measurement system further includes a second reaction liquid addition means for adding a second reaction liquid to the sample water for converting inorganic carbon into carbon dioxide. , an inorganic carbon conversion means for heating the sample water to which the second reaction liquid has been added to generate carbon dioxide from the inorganic carbon in the sample water; The measurement system includes a quantitative means for quantifying carbon dioxide generated in the total carbon conversion means and inorganic carbon conversion means, and a method for determining the amount of organic carbon contained in the sample from the detected value of the quantitative means. A carbon amount measuring device characterized by being provided with calculation means for calculating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24518588A JPH0291569A (en) | 1988-09-29 | 1988-09-29 | Instrument for measuring carbon content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24518588A JPH0291569A (en) | 1988-09-29 | 1988-09-29 | Instrument for measuring carbon content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0291569A true JPH0291569A (en) | 1990-03-30 |
Family
ID=17129877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24518588A Pending JPH0291569A (en) | 1988-09-29 | 1988-09-29 | Instrument for measuring carbon content |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0291569A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580009A (en) * | 1991-09-20 | 1993-03-30 | Kubota Corp | Carbonic acid concentration measuring method |
| JPH06180310A (en) * | 1991-03-30 | 1994-06-28 | Shimadzu Corp | Toc poc measuring apparatus |
| CN103149250A (en) * | 2013-03-04 | 2013-06-12 | 李熔 | Online total organic carbon water quality analyzer and online total organic carbon water quality analyzing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51105886A (en) * | 1975-03-14 | 1976-09-20 | Sumitomo Chemical Co | ZENJUKI TANSORYOSOKUTE ISOCHI |
| JPS60207057A (en) * | 1984-03-30 | 1985-10-18 | Hitachi Ltd | Apparatus for measuring organic carbon in water |
| JPS6267452A (en) * | 1985-09-20 | 1987-03-27 | Hitachi Ltd | Apparatus for measuring organic carbon in water |
-
1988
- 1988-09-29 JP JP24518588A patent/JPH0291569A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51105886A (en) * | 1975-03-14 | 1976-09-20 | Sumitomo Chemical Co | ZENJUKI TANSORYOSOKUTE ISOCHI |
| JPS60207057A (en) * | 1984-03-30 | 1985-10-18 | Hitachi Ltd | Apparatus for measuring organic carbon in water |
| JPS6267452A (en) * | 1985-09-20 | 1987-03-27 | Hitachi Ltd | Apparatus for measuring organic carbon in water |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06180310A (en) * | 1991-03-30 | 1994-06-28 | Shimadzu Corp | Toc poc measuring apparatus |
| JPH0580009A (en) * | 1991-09-20 | 1993-03-30 | Kubota Corp | Carbonic acid concentration measuring method |
| CN103149250A (en) * | 2013-03-04 | 2013-06-12 | 李熔 | Online total organic carbon water quality analyzer and online total organic carbon water quality analyzing method |
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