JP2019203751A - Peracetic acid formulation concentration determination device, and reagent used in peracetic acid formulation concentration determination device - Google Patents
Peracetic acid formulation concentration determination device, and reagent used in peracetic acid formulation concentration determination device Download PDFInfo
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Abstract
【課題】持ち運びが容易であり、現場で簡便かつ迅速に過酢酸製剤の濃度を精度良く判定することができる過酢酸製剤濃度判定装置、及び、これに用いる試薬を提供する。【解決手段】過酢酸製剤の溶液に所定濃度の試薬を添加した対象溶液が収容された光透過性の容器１２と、容器に対して所定範囲の波長の測定光を照射する光源１３と、測定光の波長を所定範囲に制御する光源制御部１４と、複数段階の濃度に対応する複数の色見本１５ａ〜１５ｆを示す色見本表示部１５とを備え、測定光が容器を透過した透過光と複数の色見本のいずれかを同定することにより、対象溶液に含まれる過酢酸製剤の濃度判定を可能とした。【選択図】図１PROBLEM TO BE SOLVED: To provide a peracetic acid preparation concentration determination device which is easy to carry, can easily and quickly determine the concentration of a peracetic acid preparation with high accuracy, and a reagent used therefor. SOLUTION: A light-transmissive container 12 containing a target solution in which a reagent of a predetermined concentration is added to a solution of a peracetic acid preparation, a light source 13 for irradiating the container with measurement light having a wavelength in a predetermined range, and a measurement A light source control unit 14 for controlling the wavelength of light within a predetermined range and a color sample display unit 15 showing a plurality of color samples 15a to 15f corresponding to a plurality of levels of density are provided, and the measurement light is transmitted light that has passed through the container. By identifying any of the multiple color samples, it was possible to determine the concentration of the peracetic acid preparation contained in the target solution. [Selection diagram] Figure 1
Description
本発明は、過酢酸製剤濃度判定装置、特に食品用の過酢酸製剤の濃度を判定する過酢酸製剤濃度判定装置に関し、さらに、このような過酢酸製剤濃度判定装置に用いられる試薬に関する。 The present invention relates to a peracetic acid preparation concentration determination apparatus, and more particularly to a peracetic acid preparation concentration determination apparatus that determines the concentration of a peracetic acid preparation for food, and further relates to a reagent used in such a peracetic acid preparation concentration determination apparatus.
食中毒の予防等の観点から食品に用いる殺菌剤が重要視されている。従来から使用されている塩素系殺菌剤では、臭いが強い点、安定性が低い点、残留性がある点などにおいて懸念されるところがあり、これらの懸念点を解消しうる殺菌剤として、過酢酸製剤が注目されている。過酢酸製剤は、臭いがほぼなく、食品への使用に適した濃度に希釈した後の安定性が高く、食品への残留性が非常に低い、などの点から、塩素系殺菌剤に代わるものとして期待されている。このような過酢酸製剤は、諸外国においては、野菜、果物、食肉等の幅広い食品に対して殺菌目的で広く使用されてきている。一方、日本においては、近年、食品添加物としての指定がなされ、製造基準・使用基準、及び、成分規格が告示されたところである。 From the viewpoint of prevention of food poisoning and the like, bactericides used for food are regarded as important. Conventionally used chlorinated fungicides have concerns about strong odor, low stability, persistence, etc. As a bactericidal agent that can eliminate these concerns, peracetic acid Formulations are drawing attention. Peracetic acid is an alternative to chlorinated fungicides because it has almost no odor, is highly stable after being diluted to a concentration suitable for use in foods, and has very low persistence in foods. As expected. Such peracetic acid preparations have been widely used for disinfecting a wide variety of foods such as vegetables, fruits, and meats in other countries. On the other hand, in Japan, in recent years, it has been designated as a food additive, and production standards / use standards and ingredient standards have been announced.
しかしながら、従来は、過酢酸製剤の原液の成分規格を確認するための公定法は存在するものの、食品に対して使用するために希釈した状態における実用濃度を確認するための公定法は存在していなかった。実用濃度の測定としては、例えば、試験紙を用いた方法や、ヨウ素電量滴定法による複雑な構成の装置を用いたものがあったが、試験紙を用いた方法は、簡便に測定できるが精度が低く、低濃度側で特に信頼性が低いという問題があった（例えば特許文献１、２）。また、ヨウ素電量滴定法による装置は、装置が大型で重量があるため、現場で簡便かつ迅速に測定を行うことが難しかった。 Conventionally, however, there is an official method for confirming the component specifications of the stock solution of peracetic acid preparation, but there is an official method for confirming the practical concentration in a diluted state for use on food. There wasn't. Examples of the practical concentration measurement include a method using a test paper and a device having a complicated configuration by the iodine coulometric titration method, but the method using a test paper can be measured easily but is accurate. However, the reliability is particularly low on the low concentration side (for example, Patent Documents 1 and 2). In addition, since the apparatus based on the iodine coulometric titration method is large and heavy, it is difficult to perform measurement easily and quickly on site.
そこで本発明は、持ち運びが容易であり、現場で簡便かつ迅速に過酢酸製剤の濃度を精度良く判定することができる過酢酸製剤濃度判定装置、及び、これに用いる試薬を提供することを目的とする。 Therefore, the present invention aims to provide a peracetic acid preparation concentration determination apparatus that is easy to carry and can accurately and easily determine the concentration of a peracetic acid preparation on site, and a reagent used therefor. To do.
上記課題を解決するために、本発明の過酢酸製剤濃度判定装置は、過酢酸製剤の溶液に所定濃度の試薬を添加した対象溶液が収容された光透過性の容器と、容器に対して所定範囲の波長の測定光を照射する光源と、測定光の波長を所定範囲に制御する光源制御部と、複数段階の濃度に対応する複数の色見本を示す色見本表示部とを備え、測定光が容器を透過した透過光と複数の色見本のいずれかを同定することにより、対象溶液に含まれる過酢酸製剤の濃度判定を可能としたことを特徴としている。 In order to solve the above-mentioned problems, the peracetic acid preparation concentration determination device of the present invention includes a light-transmitting container containing a target solution in which a reagent of a predetermined concentration is added to a solution of a peracetic acid preparation, and a predetermined amount for the container. Measuring light comprising: a light source that emits measurement light having a range of wavelengths; a light source control unit that controls the wavelength of the measurement light within a predetermined range; and a color sample display unit that displays a plurality of color samples corresponding to a plurality of levels of density. Is characterized in that the concentration of the peracetic acid preparation contained in the target solution can be determined by identifying the transmitted light transmitted through the container and any of a plurality of color samples.
本発明の過酢酸製剤濃度判定装置において、過酢酸製剤は食品用であることが好ましい。 In the peracetic acid formulation concentration determination apparatus of the present invention, the peracetic acid formulation is preferably for food.
本発明の過酢酸製剤濃度判定装置において、所定範囲の波長は、４８０ｎｍ以上６８０ｎｍ以下であることが好ましく、５３０ｎｍ以上６３０ｎｍ以下であるとさらに好ましい。 In the peracetic acid preparation concentration determination apparatus of the present invention, the wavelength in the predetermined range is preferably from 480 nm to 680 nm, and more preferably from 530 nm to 630 nm.
本発明の過酢酸製剤濃度判定装置において、試薬はヨウ化カリウムであり、所定濃度は５％以上であることが好ましく、５％を超えるとさらに好ましく、１０％以上であるとさらによい。 In the peracetic acid preparation concentration determination apparatus of the present invention, the reagent is potassium iodide, and the predetermined concentration is preferably 5% or more, more preferably more than 5%, and even more preferably 10% or more.
本発明の過酢酸製剤濃度判定装置において、測定光と透過光に基づいて算出される吸光度の変化が、過酢酸製剤の濃度の変化に対して、略比例関係にあることが好ましい。 In the peracetic acid preparation concentration determination apparatus of the present invention, it is preferable that the change in absorbance calculated based on the measurement light and the transmitted light is substantially proportional to the change in the concentration of the peracetic acid preparation.
本発明の過酢酸製剤濃度判定装置において、容器と色見本表示部が並んで設けられていることが好ましい。 In the peracetic acid preparation concentration determination apparatus of the present invention, it is preferable that the container and the color sample display section are provided side by side.
本発明の過酢酸製剤濃度判定装置において、複数の色見本は、過酢酸製剤の用途に応じて交換可能であることが好ましい。 In the peracetic acid formulation concentration determination apparatus of the present invention, it is preferable that the plurality of color samples can be exchanged according to the use of the peracetic acid formulation.
本発明の試薬は、上述のいずれか１つの過酢酸製剤濃度判定装置において、過酢酸製剤溶液に所定濃度添加されることを特徴としている。 The reagent of the present invention is characterized in that a predetermined concentration is added to a peracetic acid preparation solution in any one of the above-described peracetic acid preparation concentration determination apparatuses.
本発明の試薬はヨウ化カリウムであることが好ましく、上記所定濃度は５％以上であることが好ましい。この所定濃度は、５％を超えることがさらに好ましく、１０％以上であるとさらによい。 The reagent of the present invention is preferably potassium iodide, and the predetermined concentration is preferably 5% or more. This predetermined concentration is more preferably more than 5%, and even more preferably 10% or more.
本発明の過酢酸製剤濃度判定装置は、持ち運びが容易であり、現場で簡便かつ迅速に過酢酸製剤の濃度を精度良く判定することが可能である。 The peracetic acid preparation concentration determination apparatus of the present invention is easy to carry, and can determine the concentration of a peracetic acid preparation with high accuracy on the spot.
以下、本発明の実施形態に係る過酢酸製剤濃度判定装置及び試薬について図面を参照しつつ詳しく説明する。
図１を参照しつつ過酢酸製剤濃度判定装置の構成について説明する。図１（ａ）は、本実施形態に係る過酢酸製剤濃度判定装置１０の構成を概念的に示した図、（ｂ）は（ａ）の過酢酸製剤濃度判定装置１０において、容器１２と色見本表示部１５が並んで配置された構成を概念的に示す図である。
Hereinafter, a peracetic acid preparation concentration determination device and a reagent according to an embodiment of the present invention will be described in detail with reference to the drawings.
The configuration of the peracetic acid preparation concentration determination apparatus will be described with reference to FIG. FIG. 1A is a diagram conceptually showing the configuration of a peracetic acid concentration determination apparatus 10 according to this embodiment, and FIG. 1B is a diagram showing a container 12 and a color in the peracetic acid concentration determination apparatus 10 of FIG. It is a figure which shows notionally the structure by which the sample display part 15 is arrange | positioned along with.
図１（ａ）に示すように、過酢酸製剤濃度判定装置１０は、その筐体１１内に、容器１２を収容するとともに、光源１３及び光源制御部１４を備える。容器１２は、筐体１１に設けられた所定の空間に収容される。また、図１（ｂ）に示すように、筐体１１の正面において、容器１２と並ぶように、色見本表示部１５が設けられている。 As shown in FIG. 1A, the peracetic acid preparation concentration determination device 10 accommodates a container 12 in a housing 11 and includes a light source 13 and a light source control unit 14. The container 12 is accommodated in a predetermined space provided in the housing 11. In addition, as shown in FIG. 1B, a color sample display unit 15 is provided on the front surface of the housing 11 so as to be aligned with the container 12.
筐体１１は、所定の耐水性と耐久性を有し、さらに、持ち運び可能な重量で構成可能な材料、例えば樹脂材料で構成される。これにより、容器１２の操作その他の場面で濡れた手で操作するなどして水分が付着しても誤動作が発生することを防ぐことができ、また、運搬中や操作中などに衝撃が加わったとしても破損しにくいことから、動作不能となることを防ぐことができる。 The case 11 has a predetermined water resistance and durability, and is made of a material that can be constructed with a portable weight, such as a resin material. As a result, it is possible to prevent a malfunction from occurring even if moisture is attached by operating the container 12 with a wet hand in other situations, and an impact is applied during transportation or operation. However, since it is hard to break, it can be prevented from becoming inoperable.
容器１２は、少なくとも入射面と出射面が光透過性を有する材料、例えば樹脂材料やガラスで構成される。入射面と出射面は互いに対向して設けられ、入射面には光源１３からの測定光が入射し、この測定光が容器内の対象溶液を透過し、筐体１１の正面に位置する出射面から外部へ出射する。
ここで、筐体１１において、少なくとも、容器１２が収容される空間を光が透過しない材料で構成すると、対象溶液の透過光が無駄なく出射面から出射するため、測定精度を安定させることができる。
The container 12 is made of a material having at least an entrance surface and an exit surface that are light transmissive, such as a resin material or glass. The incident surface and the exit surface are provided opposite to each other, and the measurement light from the light source 13 enters the entrance surface, and the measurement light passes through the target solution in the container and is located on the front surface of the housing 11. To the outside.
Here, in the case 11, if at least the space in which the container 12 is accommodated is made of a material that does not transmit light, the transmitted light of the target solution is emitted from the emission surface without waste, so that the measurement accuracy can be stabilized. .
容器１２には、過酢酸製剤の溶液に所定濃度の試薬を添加した対象溶液が収容される。
過酢酸製剤は、食品用の製剤であり、より具体的には、牛、鶏、及び豚の食肉、並びに、野菜の表面殺菌の目的に用いる製剤である。過酢酸製剤は、厚生労働省による規格基準に沿って、過酢酸、又は、酢酸、過酸化水素、１−ヒドロキシエチリデン−１，１−ジホスホン酸、若しくはオクタン酸を原料とし、過酢酸若しくは酢酸、及び、過酸化水素に１−ヒドロキシエチリデン−１，１−ジホスホン酸を混合したもの、又は、オクタン酸を混合したものである。
The container 12 stores a target solution obtained by adding a reagent of a predetermined concentration to a solution of a peracetic acid preparation.
The peracetic acid preparation is a preparation for food, more specifically, a preparation used for the purpose of surface sterilization of beef, chicken, and pork meat and vegetables. Peracetic acid preparation is peracetic acid or acetic acid, hydrogen peroxide, 1-hydroxyethylidene-1,1-diphosphonic acid, or octanoic acid as a raw material in accordance with the standards of the Ministry of Health, Labor and Welfare. , 1-hydroxyethylidene-1,1-diphosphonic acid mixed with hydrogen peroxide or octanoic acid.
試薬はヨウ化カリウムであり、その濃度（質量濃度）は５％以上であることが好ましい。例えば、５ｇのヨウ化カリウムを過酢酸製剤の溶液１００ｍＬに添加するとき、ヨウ化カリウムの濃度が５％となる（”Ｌ”はリットルである）。ヨウ化カリウムの濃度を５％以上にすることにより、対象溶液中の過酢酸製剤の濃度の違いに応じて、対象溶液を透過した透過光の色の違いが明確化しやすくなることから、過酢酸製剤の濃度判定を精度良く行うことが可能となる。これに対して、ヨウ化カリウムの濃度が５％未満であるときは、透過光の色が変動して不安定であるため、色見本表示部１５と対比・同定することが困難となることから、目視によって過酢酸製剤の濃度判定を行うことは難しい。 The reagent is potassium iodide, and its concentration (mass concentration) is preferably 5% or more. For example, when 5 g of potassium iodide is added to 100 mL of a solution of peracetic acid, the concentration of potassium iodide is 5% (“L” is liter). By setting the potassium iodide concentration to 5% or more, it becomes easy to clarify the difference in the color of transmitted light transmitted through the target solution according to the difference in the concentration of the peracetic acid preparation in the target solution. It is possible to accurately determine the concentration of the preparation. On the other hand, when the concentration of potassium iodide is less than 5%, the color of the transmitted light fluctuates and is unstable, which makes it difficult to compare and identify with the color sample display unit 15. It is difficult to determine the concentration of a peracetic acid preparation visually.
さらに、ヨウ化カリウムの濃度は、発色の安定性の観点からは５％を超えた濃度が好ましい。また、濃度１０％以上とすると発色の安定性がより高まるため、さらに好ましい。
また、発色を安定させるための補助剤として亜ジチオン酸ナトリウムと、ｐＨ調整のためクエン酸とリン酸水素二ナトリウムで構成された緩衝剤を微量添加するとよい。また溶液の保存性を高めるためにはエチレンジアミン四酢酸を０．０１％以下の範囲で配合させるとよい。
Furthermore, the concentration of potassium iodide is preferably a concentration exceeding 5% from the viewpoint of color development stability. Further, the concentration of 10% or more is more preferable because the stability of color development is further increased.
A small amount of sodium dithionite as an auxiliary agent for stabilizing color development and a buffer composed of citric acid and disodium hydrogen phosphate for pH adjustment may be added. In order to improve the storage stability of the solution, ethylenediaminetetraacetic acid is preferably blended within a range of 0.01% or less.
光源１３は、容器１２に対して所定範囲の波長の測定光を照射する。測定光の波長範囲を限定することができれば、光源の種類は限定されず、例えば発光ダイオード（ＬＥＤ）を用いることができる。また、フィルタを用いることによって波長を限定できれば、発光波長の広い光源を用いることもできる。上記フィルタは、容器１２の入射面上若しくは近傍に設け、又は、容器１２の入射面に所定の色を付してフィルタ機能を持たせても良い。測定光の波長の範囲は、光源制御部１４によって制御される。光源制御部１４は、波長の制御のほか、光源１３の動作の制御、例えばオン・オフ、出射強度の制御も行う。 The light source 13 irradiates the container 12 with measurement light having a wavelength within a predetermined range. If the wavelength range of measurement light can be limited, the kind of light source will not be limited, for example, a light emitting diode (LED) can be used. If the wavelength can be limited by using a filter, a light source having a wide emission wavelength can be used. The filter may be provided on or near the incident surface of the container 12, or a predetermined color may be given to the incident surface of the container 12 to provide a filter function. The wavelength range of the measurement light is controlled by the light source control unit 14. In addition to controlling the wavelength, the light source control unit 14 also controls the operation of the light source 13, such as on / off and emission intensity control.
試薬としてヨウ化カリウムを用いた対象溶液に対して照射する測定光の波長は、４８０ｎｍ以上６８０ｎｍ以下の範囲にすることが好ましい。この範囲に設定することにより、対象溶液に照射する測定光と、対象溶液を透過した透過光とに基づいて算出される吸光度の変化が、過酢酸製剤の濃度の変化に対して略比例関係となる。このため、透過光の吸光度又は色によって、過酢酸製剤の濃度を正確に判定することができる。これに対して、測定光の波長が４８０ｎｍ未満の範囲、及び、６８０ｎｍを超える範囲では、過酢酸製剤の濃度変化に対する吸光度の変化が比例しないため、透過光における吸光度や色では過酢酸製剤の濃度を判定することは困難である。 The wavelength of the measurement light applied to the target solution using potassium iodide as a reagent is preferably in the range of 480 nm to 680 nm. By setting this range, the change in absorbance calculated based on the measurement light applied to the target solution and the transmitted light transmitted through the target solution is approximately proportional to the change in the concentration of the peracetic acid preparation. Become. For this reason, the density | concentration of a peracetic acid formulation can be correctly determined with the light absorbency or color of transmitted light. On the other hand, in the range where the wavelength of the measuring light is less than 480 nm and in the range exceeding 680 nm, the change in absorbance is not proportional to the change in concentration of the peracetic acid formulation. Is difficult to determine.
さらに、測定光の波長を５３０ｎｍ以上６８０ｎｍ以下とすると、過酢酸製剤の濃度変化に対する吸光度の変化の直線性が高まるため、過酢酸製剤の濃度判定の精度が高まるため好ましい。測定光の波長を５３０ｎｍ以上６３０ｎｍ以下とすると、透過光の強度を一定以上に確保できるため、判定の際に視認し易くなることから、過酢酸製剤の濃度判定を容易かつ高精度で行うことができる。 Furthermore, it is preferable to set the wavelength of the measurement light to be 530 nm or more and 680 nm or less because the linearity of the change in absorbance with respect to the change in concentration of the peracetic acid formulation is increased, and the concentration determination accuracy of the peracetic acid formulation is increased. When the wavelength of the measurement light is 530 nm or more and 630 nm or less, the intensity of the transmitted light can be ensured to be a certain level or more, so that it is easy to visually recognize at the time of determination. it can.
色見本表示部１５は、複数段階の濃度に対応する複数の色見本を示す。例えば、図１（ｂ）に示すように、６つの色見本１５ａ、１５ｂ、１５ｃ、１５ｄ、１５ｅ、１５ｆが、容器１２と並んで設けられている。前記色見本１５ａ〜１５ｆは、目視において互いに識別可能な色を有している。色見本１５ａ〜１５ｆは、例えば、白色で光を透過させない樹脂材料製の板材に印刷を施すことによって、反射色を呈するように形成される。この色見本１５ａ〜１５ｆの色は、例えば、反射光の可視吸収スペクトルを用いて規定することによって、判定者が識別可能に設定することが可能である。 The color sample display unit 15 shows a plurality of color samples corresponding to a plurality of levels of density. For example, as illustrated in FIG. 1B, six color samples 15 a, 15 b, 15 c, 15 d, 15 e, and 15 f are provided side by side with the container 12. The color samples 15a to 15f have colors that can be distinguished from each other visually. The color samples 15a to 15f are formed so as to exhibit a reflected color, for example, by printing on a plate material made of a resin material that is white and does not transmit light. The colors of the color samples 15a to 15f can be set to be discriminable by the determiner, for example, by defining using the visible absorption spectrum of the reflected light.
なお、色見本表示部１５を光透過性材料で構成し、色見本１５ａ〜１５ｆを光透過性のフィルム等で形成することによって透過色を呈するようにした構成も可能である。この場合は、光源１３からの出射光などを筐体１１の内部側から色見本表示部１５へ照射するとよい。 A configuration in which the color sample display unit 15 is made of a light-transmitting material and the color samples 15a to 15f are formed of a light-transmitting film or the like to exhibit a transmitted color is also possible. In this case, the color sample display unit 15 may be irradiated with light emitted from the light source 13 from the inside of the housing 11.
以上の色見本表示部１５の構成により、容器１２からの透過光の色と、色見本表示部１５の色見本１５ａ〜１５ｆの色を容易に比較することができ、色見本表示部１５の色見本１５ａ〜１５ｆのいずれかの色と透過光の色とを簡便に同定することができる。色見本１５ａ〜１５ｆの各色は、予めスペクトル分布を取得してあり、濃度の判明している過酢酸製剤溶液の濃度との対応関係が作成されている。このため、容器１２からの透過光の色を色見本１５ａ〜１５ｆのいずれかの色と同定することで、対応する過酢酸製剤溶液の濃度を特定できるため、濃度判定を簡便かつ精度良く行うことができる。 With the configuration of the color sample display unit 15 described above, the color of the transmitted light from the container 12 and the colors of the color samples 15a to 15f of the color sample display unit 15 can be easily compared. Any one of the colors of the samples 15a to 15f and the color of the transmitted light can be easily identified. For each color of the color samples 15a to 15f, a spectral distribution is acquired in advance, and a correspondence relationship with the concentration of the peracetic acid preparation solution whose concentration is known is created. For this reason, since the concentration of the corresponding peracetic acid preparation solution can be specified by identifying the color of the transmitted light from the container 12 as any one of the color samples 15a to 15f, the concentration determination can be performed easily and accurately. Can do.
なお、色見本表示部１５における色見本の数や形態は、図１（ｂ）に例示した数や形態に限定されない。例えば、６つ未満や７つ以上であってもよい。また、図１（ｂ）のように筐体１１に固定された構成に代えて、回転可能な基材に複数の色見本を配置した構成も可能である。この場合、例えば、円板の表面において外周に沿って複数の色見本を配置し、この円板を平面中心の周りに回転させることによって、各色見本を順次容器１２と並べて配置し、これによって色見本と容器１２からの透過光の比較をし易くすることができる。 Note that the number and form of the color samples in the color sample display unit 15 are not limited to the numbers and forms illustrated in FIG. For example, it may be less than 6 or 7 or more. Moreover, it can replace with the structure fixed to the housing | casing 11 like FIG.1 (b), and the structure which has arrange | positioned the several color sample to the base material which can rotate is also possible. In this case, for example, a plurality of color swatches are arranged along the outer periphery on the surface of the disk, and the color swatches are sequentially arranged side by side with the container 12 by rotating the disk around the plane center. It is possible to easily compare the sample and the transmitted light from the container 12.
また、過酢酸製剤の用途・種類などに応じて、色見本表示部１５の色見本を交換可能とすると、想定される範囲の色見本と透過光を比較できるため、効率良く、精度の高い濃度判定を行うことができる。 In addition, if the color sample of the color sample display unit 15 can be exchanged according to the use and type of the peracetic acid preparation, the color sample in the expected range can be compared with the transmitted light, so that the concentration can be efficiently and highly accurate. Judgment can be made.
次に実施例について説明する。図２〜図５は、対象溶液における過酢酸製剤の濃度（ＰＡＡ濃度）（ｍｇ／Ｌ）（横軸）に対する吸光度（縦軸）の変化を示すグラフである。図２と図３は、ヨウ化カリウムの濃度が２〜５％の場合を示しており、図４と図５は、ヨウ化カリウムの濃度が５〜５０％の場合を示している。図２と図３においては、ヨウ化カリウムの濃度２．０％、３．０％、４．０％、５．０％をそれぞれ示している。図４と図５においては、ヨウ化カリウムの濃度５％、１０％、２０％、５０％をそれぞれ示している。 Next, examples will be described. 2-5 is a graph which shows the change of the light absorbency (vertical axis) with respect to the density | concentration (PAA density | concentration) (mg / L) (horizontal axis) of the peracetic acid formulation in an object solution. 2 and 3 show cases where the concentration of potassium iodide is 2 to 5%, and FIGS. 4 and 5 show cases where the concentration of potassium iodide is 5 to 50%. 2 and 3 show potassium iodide concentrations of 2.0%, 3.0%, 4.0%, and 5.0%, respectively. 4 and 5 show potassium iodide concentrations of 5%, 10%, 20%, and 50%, respectively.
ここで、対象溶液中の過酢酸製剤としては、エンビロテッックジャパン株式会社製のパーサンＭＰ２−Ｊ（商品名）を用いた。この過酢酸製剤の構成は、過酢酸１５％、酢酸４０％、過酸化水素５．５％、安定剤１％未満（質量濃度）である。 Here, Persan MP2-J (trade name) manufactured by Envirotec Japan Co., Ltd. was used as the peracetic acid preparation in the target solution. The composition of this peracetic acid formulation is 15% peracetic acid, 40% acetic acid, 5.5% hydrogen peroxide, and less than 1% stabilizer (mass concentration).
図２〜図５の各図においては、容器１２に照射した測定光の波長は次の通りである。
図２（ａ）：測定光の波長４３０ｎｍ
図２（ｂ）：測定光の波長４８０ｎｍ
図２（ｃ）、図４（ａ）：測定光の波長５３０ｎｍ
図３（ａ）、図４（ｂ）：測定光の波長５８０ｎｍ
図３（ｂ）、図４（ｃ）：測定光の波長６３０ｎｍ
図５（ａ）：測定光の波長６８０ｎｍ
図５（ｂ）：測定光の波長７３０ｎｍ
2 to 5, the wavelength of the measurement light irradiated on the container 12 is as follows.
FIG. 2A: wavelength of measurement light 430 nm
FIG. 2B: wavelength of measurement light 480 nm
2 (c) and 4 (a): wavelength of measurement light 530 nm
3 (a) and 4 (b): wavelength of measurement light 580 nm
3 (b) and 4 (c): wavelength of measurement light 630 nm
FIG. 5A: wavelength of measurement light 680 nm
FIG. 5B: wavelength of measurement light 730 nm
図２（ｂ）、（ｃ）、図３（ａ）、（ｂ）、及び、図４（ａ）、（ｂ）、（ｃ）に示す透過光（波長４８０ｎｍ、５３０ｎｍ、５８０ｎｍ、６３０ｎｍ）においては、ヨウ化カリウムの濃度が５％のときには、過酢酸製剤濃度と吸光度は略比例関係となっている。これに対して、図２（ｂ）、（ｃ）、図３（ａ）、（ｂ）において、濃度５％未満においては、過酢酸製剤濃度と吸光度は比例していないことが分かる。 2 (b), (c), FIGS. 3 (a), (b), and transmitted light (wavelengths 480 nm, 530 nm, 580 nm, 630 nm) shown in FIGS. 4 (a), (b), and (c). When the concentration of potassium iodide is 5%, the concentration of peracetic acid preparation and the absorbance are approximately proportional. In contrast, in FIGS. 2 (b), 2 (c), 3 (a) and 3 (b), it is understood that the concentration of the peracetic acid preparation and the absorbance are not proportional when the concentration is less than 5%.
また、図５（ａ）に示す透過光については、ヨウ化カリウムの濃度が５％を超えた範囲において、過酢酸製剤濃度と吸光度は略比例関係となっている。 For the transmitted light shown in FIG. 5 (a), the concentration of peracetic acid preparation and the absorbance are approximately proportional in the range where the concentration of potassium iodide exceeds 5%.
上述のように、図２（ｂ）、（ｃ）、図３（ａ）、（ｂ）、図４（ａ）、（ｂ）、（ｃ）、及び、図５（ａ）に示す透過光、すなわち、波長４８０ｎｍ以上６８０ｎｍ以下の範囲の透過光においては、ヨウ化カリウムの濃度によって、過酢酸製剤濃度と吸光度とが略比例関係となることが分かった。 As described above, the transmitted light shown in FIGS. 2B, 2C, 3A, 3B, 4A, 4B, 5C, and 5A. That is, it was found that the peracetic acid preparation concentration and the absorbance are approximately proportional to the concentration of potassium iodide in the transmitted light in the wavelength range of 480 nm to 680 nm.
各図を対比すると、測定光の波長が５３０ｎｍ以上６８０ｎｍ以下、さらには５３０ｎｍ以上６３０ｎｍ以下の範囲であると過酢酸製剤濃度と吸光度との変化の直線性が高まることが分かる。
本発明について上記実施形態を参照しつつ説明したが、本発明は上記実施形態に限定されるものではなく、改良の目的又は本発明の思想の範囲内において改良又は変更が可能である。
Comparing the figures, it can be seen that the linearity of the change between the concentration of the peracetic acid preparation and the absorbance increases when the wavelength of the measurement light is in the range of 530 nm to 680 nm, and further 530 nm to 630 nm.
Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or modified within the scope of the purpose of the improvement or the idea of the present invention.
以上のように、本発明に係る過酢酸製剤濃度判定装置は、持ち運びが容易であり、現場で簡便かつ迅速に過酢酸製剤の濃度を精度良く判定することができる点で有用である。 As described above, the peracetic acid preparation concentration determination apparatus according to the present invention is useful in that it is easy to carry and can easily and quickly determine the concentration of a peracetic acid preparation on site.
１０ 過酢酸製剤濃度判定装置
１１ 筐体
１２ 容器
１３ 光源
１４ 光源制御部
１５ 色見本表示部
１５ａ、１５ｂ、１５ｃ、１５ｄ、１５ｅ、１５ｆ 色見本
DESCRIPTION OF SYMBOLS 10 Peracetic acid formulation density | concentration determination apparatus 11 Case 12 Container 13 Light source 14 Light source control part 15 Color sample display part 15a, 15b, 15c, 15d, 15e, 15f Color sample
上記課題を解決するために、本発明の過酢酸製剤濃度判定装置は、過酢酸製剤の溶液に所定濃度の試薬を添加した対象溶液が収容された光透過性の容器と、容器に対して所定範囲の波長の測定光を照射する光源と、測定光の波長を所定範囲に制御する光源制御部と、複数段階の濃度に対応する複数の色見本を示す色見本表示部とを備え、前記容器と前記色見本表示部が並んで設けられており、前記過酢酸製剤は食品用であって、前記過酢酸製剤の濃度は５０ｍｇ／Ｌ〜５００ｍｇ／Ｌの範囲であり、測定光が容器を透過した透過光と複数の色見本のいずれかとを目視により同定することにより、対象溶液に含まれる過酢酸製剤の濃度判定を可能としたことを特徴としている。
In order to solve the above-mentioned problems, the peracetic acid preparation concentration determination device of the present invention includes a light-transmitting container containing a target solution in which a reagent of a predetermined concentration is added to a solution of a peracetic acid preparation, and a predetermined amount for the container. A light source that emits measurement light having a wavelength in the range; a light source control unit that controls the wavelength of the measurement light to a predetermined range; and a color sample display unit that displays a plurality of color samples corresponding to a plurality of levels of density, and the container And the color sample display section are provided side by side, the peracetic acid preparation is for food, the concentration of the peracetic acid preparation is in the range of 50 mg / L to 500 mg / L, and the measurement light is transmitted through the container By identifying the transmitted light and any one of a plurality of color samples with the naked eye , it is possible to determine the concentration of the peracetic acid preparation contained in the target solution.
Claims (15)
前記容器に対して所定範囲の波長の測定光を照射する光源と、
前記測定光の波長を前記所定範囲に制御する光源制御部と、
複数段階の濃度に対応する複数の色見本を示す色見本表示部とを備え、
前記測定光が前記容器を透過した透過光と前記複数の色見本のいずれかを同定することにより、前記対象溶液に含まれる過酢酸製剤の濃度判定を可能としたことを特徴とする過酢酸製剤濃度判定装置。 A light transmissive container containing a target solution in which a reagent of a predetermined concentration is added to a solution of a peracetic acid formulation;
A light source for irradiating the container with measurement light having a predetermined wavelength range;
A light source controller that controls the wavelength of the measurement light within the predetermined range;
A color sample display section showing a plurality of color samples corresponding to multiple levels of density,
A peracetic acid preparation characterized in that the concentration of the peracetic acid preparation contained in the target solution can be determined by identifying either the transmitted light transmitted through the container or the plurality of color samples. Density determination device.
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