JPH04172243A - Method for measuring concentration of residual oxidant in sea water - Google Patents
Method for measuring concentration of residual oxidant in sea waterInfo
- Publication number
- JPH04172243A JPH04172243A JP2299053A JP29905390A JPH04172243A JP H04172243 A JPH04172243 A JP H04172243A JP 2299053 A JP2299053 A JP 2299053A JP 29905390 A JP29905390 A JP 29905390A JP H04172243 A JPH04172243 A JP H04172243A
- Authority
- JP
- Japan
- Prior art keywords
- residual oxidant
- concentration
- residual
- sea water
- measuring
- 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
- 239000007800 oxidant agent Substances 0.000 title claims abstract description 21
- 239000013535 sea water Substances 0.000 title claims abstract description 17
- 230000001590 oxidative effect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 7
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 6
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 7
- 238000009928 pasteurization Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、海水殺菌装置で殺菌された海水の残留オキシ
ダントを測定する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for measuring residual oxidants in seawater sterilized in a seawater sterilizer.
（従来の技術）
従来の残留オキシダント測定方法は、測定対象である海
水を採取し、秤量し、ヨウ化カリウムを適当量添加し、
硫酸等の酸を添加して海水を酸性にし、残留オキシダン
トから遊離したヨウ素をチオ硫酸ソーダで滴定すること
により測定した。(Prior art) The conventional method for measuring residual oxidants is to collect seawater to be measured, weigh it, add an appropriate amount of potassium iodide,
The seawater was made acidic by adding an acid such as sulfuric acid, and the iodine liberated from the residual oxidant was measured by titration with sodium thiosulfate.
（発明が解決しようとする課Ｂ）
海水中の残留オキシダントを連続的に管理するためには
、従来の湿式分析法では、頻繁に分析を繰り返す必要が
あった。また、イオンクロマトグラフィーを使用すれば
、連続測定は可能であるが、装置が高価であり、実用的
でない。(Problem B to be solved by the invention) In order to continuously manage residual oxidants in seawater, conventional wet analysis methods require frequent repetition of analysis. Furthermore, continuous measurement is possible using ion chromatography, but the equipment is expensive and impractical.
そこで、本発明では、従来の問題点を解消し、安価な装
置を用い、連続分析を可能とした残留オキシダント測定
方法を提供しようとするものである。Therefore, the present invention aims to solve the conventional problems and provide a residual oxidant measuring method that uses inexpensive equipment and enables continuous analysis.
（課題を解決するための手段）
本発明は、塩素やオゾンにより殺菌する海水中の残留オ
キシダント濃度の測定方法において、殺菌前後の海水の
酸化還元電極により電位差を計測して、残留オキシダン
ト濃度を求めることを特徴とする残留オキシダント濃度
の測定方法である。(Means for Solving the Problems) The present invention is a method for measuring the concentration of residual oxidants in seawater that is sterilized with chlorine or ozone, in which the potential difference is measured by redox electrodes in seawater before and after sterilization to determine the concentration of residual oxidants. This is a method for measuring residual oxidant concentration.
（作用）
海水中に設置した酸化還元電極は、オキシダント濃度に
より、次のような電位を示す。(Function) A redox electrode installed in seawater exhibits the following potential depending on the oxidant concentration.
Ｅ＝Ｅ ０＋（ＲＴ／ＺＦ）ｌ’ｏｇ（Ｏス）但し、
ＯＸ：オキシダント濃度
ＲＴ／ＺＦ：定数
Ｅｏ、原海水の酸化還元電極
故に、殺菌前後の酸化還元電位差は
八Ｅ−（Ｅ＋（ＲＴ／ＺＦ）ｐｏｇ（ＯＸ））−Ｅ。E=E 0+(RT/ZF)l'og(Osu)However,
OX: oxidant concentration RT/ZF: constant Eo, because the raw seawater is an oxidation-reduction electrode, the oxidation-reduction potential difference before and after sterilization is 8E-(E+(RT/ZF)pog(OX))-E.
＝ （ＲＴ ／Ｚ Ｆ ）ｉ！ ｏｇ（Ｏｘ）従って、
実験により予め定数（ＲＴ／ＺＦ）を求めておけば、実
際の海水の殺菌前後の酸化還元電位を測定することによ
り、残留オキシダント濃度を上式を用いて算出すること
ができる。= (RT/ZF)i! og(Ox) Therefore,
If the constant (RT/ZF) is determined in advance through experiments, the residual oxidant concentration can be calculated using the above equation by measuring the redox potential of the actual seawater before and after sterilization.
（実施例）
海水にオゾンを注入して殺菌を行った後、海水中の残留
オキシダント濃度を従来の湿式分析法で測定し、これに
対応して本発明の酸化還元電位差を測定して、両者の関
係を第１図に示した。(Example) After sterilizing seawater by injecting ozone, the residual oxidant concentration in the seawater was measured using a conventional wet analysis method, and the redox potential difference of the present invention was measured accordingly. The relationship is shown in Figure 1.
図から明らかなように、両者は一次関数の関係にあると
ころから、同図を用いることにより酸化還元電位差から
残留オキシダント濃度を求めることができる。As is clear from the figure, since the two have a linear function relationship, the residual oxidant concentration can be determined from the redox potential difference by using the figure.
（発明の効果）
本発明は、上記の構成を採用することにより、酸化還元
電極と電位差計のみで、オンラインで残留オンライを自
動分析することが可能になった。(Effects of the Invention) By employing the above configuration, the present invention has made it possible to automatically analyze residual online using only a redox electrode and a potentiometer.
また、その測定精度、再現性は、従来の湿式分析法と比
較して相当に向上した。さらに、薬品を使用しないので
、メンテナンスが容易になり、測定作業が簡便になった
。Furthermore, the measurement accuracy and reproducibility have been significantly improved compared to conventional wet analysis methods. Furthermore, since no chemicals are used, maintenance is easier and measurement work is simpler.
第１図は、実施例について、湿式分析法による残留オキ
シダント濃度と酸化還元電位差との関係を示した図であ
る。FIG. 1 is a diagram showing the relationship between the residual oxidant concentration and the redox potential difference according to the wet analysis method for Examples.
Claims (1)
濃度の測定方法において、殺菌前後の海水の酸化還元電
極により電位差を計測して、残留オキシダント濃度を求
めることを特徴とする残留オキシダント濃度の測定方法
。A method for measuring the concentration of residual oxidants in seawater that is sterilized with chlorine or ozone, the method of measuring the concentration of residual oxidants, which is characterized in that the residual oxidant concentration is determined by measuring a potential difference with an oxidation-reduction electrode in the seawater before and after sterilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2299053A JPH04172243A (en) | 1990-11-06 | 1990-11-06 | Method for measuring concentration of residual oxidant in sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2299053A JPH04172243A (en) | 1990-11-06 | 1990-11-06 | Method for measuring concentration of residual oxidant in sea water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04172243A true JPH04172243A (en) | 1992-06-19 |
Family
ID=17867601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2299053A Pending JPH04172243A (en) | 1990-11-06 | 1990-11-06 | Method for measuring concentration of residual oxidant in sea water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04172243A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6585898B1 (en) | 1998-03-09 | 2003-07-01 | Otre Ab | Method and apparatus for preparation and use of ozone water |
| WO2008041470A1 (en) * | 2006-09-27 | 2008-04-10 | Tg Corporation | Method for treatment of ballast water for ship |
-
1990
- 1990-11-06 JP JP2299053A patent/JPH04172243A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6585898B1 (en) | 1998-03-09 | 2003-07-01 | Otre Ab | Method and apparatus for preparation and use of ozone water |
| WO2008041470A1 (en) * | 2006-09-27 | 2008-04-10 | Tg Corporation | Method for treatment of ballast water for ship |
| JP5412111B2 (en) * | 2006-09-27 | 2014-02-12 | 株式会社 Ｔｇコーポレーション | Ship ballast water treatment method |
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