JP2010243452A - Method and instrument for continuously measuring concentration of peracetic acid - Google Patents
Method and instrument for continuously measuring concentration of peracetic acid Download PDFInfo
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この発明は、成分濃度を検出するためのポーラロ方式による過酢酸濃度連続測定方法及び過酢酸濃度連続測定装置に関する。 The present invention relates to a peracetic acid concentration continuous measuring method and a peracetic acid concentration continuous measuring apparatus by a polar method for detecting a component concentration.
電気化学分析装置として、例えば成分濃度を検出するためのポーラロ方式による検出部を備えたものがある。 As an electrochemical analyzer, for example, there is an apparatus equipped with a polaro detection unit for detecting a component concentration.
医療器具や食品容器等の殺菌、消毒等で使用される酸化剤、特に過酢酸の濃度管理のため、ポーラロ式電極を検出器とした濃度測定装置がある。 In order to control the concentration of oxidizers used for sterilization and disinfection of medical instruments and food containers, especially peracetic acid, there is a concentration measuring device using a polar electrode as a detector.
この過酢酸の定量に関しては、検知用電極と電気分解用電極を組み合わせたヨードメトリ方式が一般的である。これは、一定濃度のヨウ化カリウム溶液に検知用電極と電気分解用電極を浸漬した測定セルにサンプル液を添加、攪拌し、ヨウ素イオンとの反応による酸化還元電位の変化に従って電解を行い、電解に要した電流量を測定し、過酢酸濃度を求めるという方法である（参考文献１，２）。 For the determination of peracetic acid, an iodometry method in which a detection electrode and an electrolysis electrode are combined is generally used. This is done by adding the sample solution to a measurement cell in which a detection electrode and an electrode for electrolysis are immersed in a fixed concentration potassium iodide solution, stirring, and performing electrolysis according to the change in redox potential due to the reaction with iodine ions. This is a method of measuring the amount of current required to obtain the peracetic acid concentration (Reference Documents 1 and 2).
ところで、従来の方法では、測定セル中に、２組４種類の電極を設置し、サンプル液を添加、撹拌、排水するための機能も必要とするため、構造は複雑化して大型化し、さらには、測定セルには一定量のサンプル液を添加しなければならないため、間欠測定とならざるをえない。 By the way, in the conventional method, two sets of four types of electrodes are installed in the measurement cell, and the function for adding, stirring, and draining the sample liquid is also required. Therefore, the structure is complicated and enlarged. Since a certain amount of sample solution must be added to the measurement cell, it must be intermittent measurement.
この発明は、これらの問題を解決し、小型でシンプルな構造で過酢酸濃度を連続して測定することができる過酢酸濃度連続測定方法及び過酢酸濃度連続測定装置を提供することを目的とする。 An object of the present invention is to solve these problems and to provide a peracetic acid concentration continuous measurement method and a peracetic acid concentration continuous measurement apparatus capable of continuously measuring the peracetic acid concentration with a small and simple structure. .
前記課題を解決し、かつ目的を達成するために、この発明は、以下のように構成した。 In order to solve the above-described problems and achieve the object, the present invention is configured as follows.
請求項１に記載の発明は、アノード極及びカソード極の２電極は、その両電極の材質を白金としたポーラロ式電極であり、
前記ポーラロ式電極を用いて過酢酸濃度を連続して測定することを特徴とする過酢酸濃度連続測定方法である。
The invention according to claim 1 is a polaro-type electrode in which the two electrodes of the anode electrode and the cathode electrode are made of platinum as a material of both electrodes,
A peracetic acid concentration continuous measuring method, wherein the peracetic acid concentration is continuously measured using the polaro electrode.
請求項２に記載の発明は、前記２電極の印加電圧が、＋３００〜＋８００ｍＶの範囲であることを特徴とする請求項１に記載の過酢酸濃度連続測定方法である。 The invention according to claim 2 is the peracetic acid concentration continuous measuring method according to claim 1, wherein the applied voltage of the two electrodes is in the range of +300 to +800 mV.
請求項３に記載の発明は、前記アノード極及び前記カソード極の両電極の表面積比が、１／３００〜１／６００の範囲であることを特徴とする請求項１に記載の過酢酸濃度連続測定方法である。 The invention according to claim 3 is characterized in that the surface area ratio of the anode electrode and the cathode electrode is in the range of 1/300 to 1/600. This is a measurement method.
請求項４に記載の発明は、２電極を用いて過酢酸濃度を連続して測定する過酢酸濃度連続測定装置であり、
前記２電極は、アノード極及びカソード極であり、
前記アノード極及びカソード極の両電極は、その材質を白金としたポーラロ式電極であることを特徴とする過酢酸濃度連続測定装置である。
Invention of Claim 4 is a peracetic acid concentration continuous measurement apparatus which measures peracetic acid concentration continuously using two electrodes,
The two electrodes are an anode electrode and a cathode electrode,
Both the anode electrode and the cathode electrode are polaro-type electrodes made of platinum as a material, and are a peracetic acid concentration continuous measuring apparatus.
請求項５に記載の発明は、前記２電極の印加電圧が、＋３００〜＋８００ｍＶの範囲であることを特徴とする請求項４に記載の過酢酸濃度連続測定装置である。 The invention according to claim 5 is the peracetic acid concentration continuous measurement apparatus according to claim 4, wherein the applied voltage of the two electrodes is in the range of +300 to +800 mV.
請求項６に記載の発明は、前記アノード極及び前記カソード極の両電極の表面積比が、１／３００〜１／６００の範囲であることを特徴とする請求項４に記載の過酢酸濃度連続測定装置である。 The invention according to claim 6 is characterized in that the ratio of surface areas of both the anode electrode and the cathode electrode is in the range of 1/300 to 1/600. It is a measuring device.
前記構成により、この発明は、以下のような効果を有する。 With the above configuration, the present invention has the following effects.
請求項１及び請求項４に記載の発明では、アノード極及びカソード極の両電極は、その材質を白金としたポーラロ式電極を用い、ポーラロ式電極を用いて過酢酸濃度を連続して測定し、アノード極及びカソード極には白金を使用しているため、極の消耗、劣化が少なく無保守、長寿命である。 In the first and fourth aspects of the invention, the anode electrode and the cathode electrode are each made of a polar electrode made of platinum, and the peracetic acid concentration is continuously measured using the polar electrode. Since platinum is used for the anode and cathode, there is little wear and deterioration of the pole, no maintenance, and long life.
請求項２及び請求項５に記載の発明では、２電極の印加電圧が、＋３００〜＋８００ｍＶの範囲であり、過酢酸の濃度変化に対して最大の電流値が得られるため、変換器回路の構成が簡単で、かつ過酢酸濃度の高精度の測定が可能である。 In the inventions according to claims 2 and 5, the applied voltage of the two electrodes is in the range of +300 to +800 mV, and the maximum current value is obtained with respect to the change in the concentration of peracetic acid. Is easy, and high-accuracy measurement of peracetic acid concentration is possible.
請求項３及び請求項６に記載の発明では、アノード極及びカソード極の両電極の表面積比が、１／３００〜１／６００の範囲であり、小型の構成で、かつ過酢酸濃度の高精度の測定が可能である。 In the invention according to claim 3 and claim 6, the surface area ratio of both the anode electrode and the cathode electrode is in the range of 1/300 to 1/600, a small configuration, and high accuracy of peracetic acid concentration. Can be measured.
以下、この発明の過酢酸濃度連続測定方法及び過酢酸濃度連続測定装置の実施の形態について説明する。この発明の実施の形態は、発明の最も好ましい形態を示すものであり、この発明はこれに限定されない。 Hereinafter, embodiments of a continuous peracetic acid concentration measurement method and a continuous peracetic acid concentration measurement apparatus according to the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.
この実施の形態の過酢酸濃度連続測定装置は、例えば、医療器具や食品容器等の殺菌、消毒等で使用され、酸化剤、特に過酢酸の濃度管理のために使用することができる。過酢酸濃度連続測定装置は、図１に示すように、過酢酸濃度測定層１０と、循環経路１１と、測定装置１２を備えている。 The peracetic acid concentration continuous measurement apparatus according to this embodiment is used, for example, for sterilization and disinfection of medical instruments and food containers, and can be used for concentration control of oxidizing agents, particularly peracetic acid. As shown in FIG. 1, the peracetic acid concentration continuous measurement device includes a peracetic acid concentration measurement layer 10, a circulation path 11, and a measurement device 12.
この過酢酸濃度測定層１０には、所定量のサンプル液が貯留されている。循環経路１１には、循環ポンプ１１ａと、洗浄装置１１ｂが備えられ、循環ポンプ１１ａによってサンプル液を循環し、洗浄装置１１ｂによってサンプル液に含まれるごみ等の異物を除去する。 A predetermined amount of sample liquid is stored in the peracetic acid concentration measurement layer 10. The circulation path 11 includes a circulation pump 11a and a cleaning device 11b. The sample solution is circulated by the circulation pump 11a, and foreign substances such as dust contained in the sample solution are removed by the cleaning device 11b.
測定装置１２は、検出器１２ａと、変換器１２ｂを備える。検出器１２ａは、アノード極Ａ及びカソード極Ｋの２電極を有し、２電極は、その両電極の材質を白金としたポーラロ式電極である。検出器１２ａには、電源１２ｃから電源電圧が印加される。 The measuring device 12 includes a detector 12a and a converter 12b. The detector 12a has two electrodes, an anode electrode A and a cathode electrode K, and the two electrodes are polaro electrodes in which the material of both electrodes is platinum. A power supply voltage is applied to the detector 12a from the power supply 12c.
この測定装置１２では、アノード極Ａ及びカソード極Ｋを、濃度の判明している数種類の過酢酸溶液のサンプル液に浸漬し、アノード極Ａとカソード極Ｋ間に電源電圧を与え、その時の電流値を測定して、電流・電圧特性表を作成し、その電流・電圧特性表から印加電圧を設定する。この濃度の判明している数種類の過酢酸溶液に応じて測定した電流・電圧特性表と、印加電圧のデータを変換器１２ｂの記憶装置に予め記憶しておく。これにより、変換器１２ｂでは、図２に示すように、電流値を過酢酸濃度に変換した測定結果を得ることができ、横軸に過酢酸濃度を示し、縦軸に電流値を示し、過酢酸濃度は電流値に比例する。 In this measuring device 12, the anode electrode A and the cathode electrode K are immersed in a sample solution of several kinds of peracetic acid solutions whose concentrations are known, a power supply voltage is applied between the anode electrode A and the cathode electrode K, and the current at that time Measure the value, create a current / voltage characteristic table, and set the applied voltage from the current / voltage characteristic table. A current / voltage characteristic table measured according to several types of peracetic acid solutions with known concentrations and data of applied voltage are stored in advance in the storage device of the converter 12b. Thereby, in the converter 12b, as shown in FIG. 2, the measurement result obtained by converting the current value into the peracetic acid concentration can be obtained, the horizontal axis indicates the peracetic acid concentration, the vertical axis indicates the current value, The acetic acid concentration is proportional to the current value.
検出器１２ａには、電源１２ｃから電源が印加され、この２電極の印加電圧は、＋３００〜＋８００ｍＶの範囲であることで、過酢酸の濃度変化に対して最大の電流値が得られるため、変換器１２ｂの回路の構成が簡単で、かつ過酢酸濃度の高精度の測定が可能である。 A power source is applied to the detector 12a from the power source 12c. Since the voltage applied to the two electrodes is in the range of +300 to +800 mV, the maximum current value is obtained with respect to the change in the concentration of peracetic acid. The circuit configuration of the vessel 12b is simple, and the peracetic acid concentration can be measured with high accuracy.
また、アノード極Ａ及びカソード極Ｋの両電極の表面積比が、１／３００〜１／６００の範囲であることで、小型の構成で、かつ過酢酸濃度の高精度の測定が可能である。また、印加電圧と電極表面積比を変えることで、過酸化水素、次亜塩素酸等他の酸化還元物質の濃度も適切に測定することができる。 In addition, since the surface area ratio of the anode electrode A and the cathode electrode K is in the range of 1/300 to 1/600, it is possible to measure the peracetic acid concentration with high accuracy in a small configuration. Further, by changing the applied voltage and the electrode surface area ratio, the concentration of other redox substances such as hydrogen peroxide and hypochlorous acid can be appropriately measured.
この過酢酸濃度連続測定装置では、２電極は、アノード極Ａ及びカソード極Ｋを過酢酸濃度測定層１０の過酢酸溶液に浸漬し、アノード極Ａとカソード極Ｋ間に電源電圧を与え、その時の電流値を測定することで、変換器１２ｂでは濃度の判明している数種類の過酢酸溶液に応じて予め記憶された電流・電圧特性表に基づき、図２に示す電流値を過酢酸濃度に変換した測定結果を得ることができる。このアノード極Ａ及びカソード極Ｋの両電極は、その材質を白金としたポーラロ式電極であり、このポーラロ式電極を用いて過酢酸濃度を連続して測定し、アノード極Ａ及びカソード極Ｋには白金を使用しているため、極の消耗、劣化が少なく無保守、長寿命である。 In this peracetic acid concentration continuous measuring apparatus, the two electrodes are immersed in the peracetic acid solution of the peracetic acid concentration measuring layer 10 for the anode A and the cathode K, and a power supply voltage is applied between the anode A and the cathode K. 2b, the converter 12b converts the current value shown in FIG. 2 into the peracetic acid concentration based on the current / voltage characteristic table stored in advance for several types of peracetic acid solutions whose concentrations are known. The converted measurement result can be obtained. Both the anode electrode A and the cathode electrode K are polaro-type electrodes whose material is platinum, and the concentration of peracetic acid is continuously measured using the polaro-type electrode. Since platinum uses platinum, there is little electrode wear and deterioration, no maintenance, and long life.
また、ポーラロ式電極が２電極で小型となり、サンプル液量は少量で済むため、測定セルは小型化することが可能で、今まで搭載できなかった小型で比較的安価な装置にも搭載が可能である。 In addition, since the polaro-type electrode is small with two electrodes and the amount of sample solution is small, the measurement cell can be miniaturized and can be mounted on a small and relatively inexpensive device that could not be mounted so far. It is.
この発明は、成分濃度を検出するためのポーラロ方式による過酢酸濃度連続測定方法及び過酢酸濃度連続測定装置に適用可能であり、小型でシンプルな構造で過酢酸濃度を連続して測定することができる。 The present invention can be applied to a continuous peracetic acid concentration measurement method and a peracetic acid concentration continuous measurement device by a polaro method for detecting a component concentration, and can continuously measure a peracetic acid concentration with a small and simple structure. it can.
１０ 過酢酸濃度測定層
１１ 循環経路
１１ａ 循環ポンプ
１１ｂ 洗浄装置
１２ 測定装置
１２ａ 検出器
１２ｂ 変換器
１２ｃ 電源 Ａ アノード極
Ｋ カソード極
DESCRIPTION OF SYMBOLS 10 Peracetic acid concentration measurement layer 11 Circulation path | route 11a Circulation pump 11b Cleaning apparatus 12 Measuring apparatus 12a Detector 12b Converter 12c Power supply A Anode pole K Cathode pole
Claims (6)
前記ポーラロ式電極を用いて過酢酸濃度を連続して測定することを特徴とする過酢酸濃度連続測定方法。 The two electrodes, the anode and the cathode, are polaro-type electrodes in which the material of both electrodes is platinum,
A peracetic acid concentration continuous measuring method, wherein the peracetic acid concentration is continuously measured using the polaro electrode.
前記２電極は、アノード極及びカソード極であり、
前記アノード極及びカソード極の両電極は、その材質を白金としたポーラロ式電極であることを特徴とする過酢酸濃度連続測定装置。 A peracetic acid concentration continuous measuring device that continuously measures peracetic acid concentration using two electrodes,
The two electrodes are an anode electrode and a cathode electrode,
The peracetic acid concentration continuous measuring apparatus, wherein both the anode electrode and the cathode electrode are polaro electrodes made of platinum.
5. The peracetic acid concentration continuous measurement apparatus according to claim 4, wherein a surface area ratio of the anode electrode and the cathode electrode is in a range of 1/300 to 1/600.
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| KR101448123B1 (en) | 2013-08-05 | 2014-10-15 | 권다윤 | Concentration measuring method of paracetic acid and automatic injection device |
| JP2015230173A (en) * | 2014-06-03 | 2015-12-21 | 株式会社 堀場アドバンスドテクノ | Peracetic acid concentration meter |
| CN105277600A (en) * | 2014-06-03 | 2016-01-27 | 株式会社堀场先进技术 | Peracetic acid concentration meter |
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