JP3172745B2 - Method for measuring peroxodisulfuric acid in wastewater - Google Patents
Method for measuring peroxodisulfuric acid in wastewaterInfo
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- JP3172745B2 JP3172745B2 JP12624894A JP12624894A JP3172745B2 JP 3172745 B2 JP3172745 B2 JP 3172745B2 JP 12624894 A JP12624894 A JP 12624894A JP 12624894 A JP12624894 A JP 12624894A JP 3172745 B2 JP3172745 B2 JP 3172745B2
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- peroxodisulfuric acid
- wastewater
- measuring
- concentration
- dpd
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Description
【０００１】[0001]
【産業上の利用分野】本発明は排水中のペルオキソ二硫
酸の測定方法に係り、特に、排水中に含有される低濃度
ペルオキソ二硫酸を短時間で容易かつ高精度に測定する
ことができる方法であって、排煙脱硫排水のＣＯＤ吸着
処理工程において、排水中に含まれる樹脂の劣化原因物
質であるペルオキソ二硫酸濃度の分析、管理に好適な排
水中のペルオキソ二硫酸の測定方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring peroxodisulfuric acid in wastewater, and more particularly to a method for easily and accurately measuring low-concentration peroxodisulfuric acid contained in wastewater. Also, the present invention relates to a method for measuring peroxodisulfuric acid in wastewater, which is suitable for analyzing and controlling the concentration of peroxodisulfuric acid, which is a substance causing deterioration of resin contained in the wastewater, in the COD adsorption treatment process of flue gas desulfurization wastewater.
【０００２】[0002]
【従来の技術及び先行技術】火力発電所等において石炭
・石油を燃焼した際に発生する排ガスの脱硫装置から排
出する排水、いわゆる排煙脱硫排水はフッ素、重金属
類、ＣＯＤ成分を含有するため、これらを除去する必要
がある。2. Description of the Related Art Wastewater discharged from a desulfurization unit of exhaust gas generated when coal and oil are burned in a thermal power plant, so-called flue gas desulfurization wastewater contains fluorine, heavy metals, and COD components. These need to be removed.
【０００３】従来、このような排煙脱硫排水の処理方法
としては、まず、重金属類、フッ素を処理するためにカ
ルシウム塩を添加して酸性排水を中和し、沈殿分離した
後、ｐＨ調整してＣＯＤ成分を吸着除去する方法が採用
されている。しかして、ＣＯＤ成分の除去に当っては、
弱塩基性又は中塩基性アニオン交換樹脂の吸着樹脂に、
重金属類及びフッ素を除去した後の排水を接触させてＣ
ＯＤ成分（主成分：ジチオン酸類（Ｓ2 Ｏ6 ））を選択
的に吸着分離している。Conventionally, as a method for treating such flue gas desulfurization wastewater, first, a calcium salt is added to treat heavy metals and fluorine, the acidic wastewater is neutralized, and the pH is adjusted after precipitation and separation. A method of adsorbing and removing the COD component has been adopted. Thus, in removing the COD component,
Adsorption resin of weak basic or medium basic anion exchange resin,
The wastewater after removing heavy metals and fluorine is brought into contact with C
The OD component (main component: dithionic acids (S 2 O 6 )) is selectively adsorbed and separated.
【０００４】このＣＯＤ成分の吸着分離に当り、排水中
に酸化性物質、例えばペルオキソ二硫酸が含有されてい
ると、吸着樹脂が酸化されて劣化する。[0004] In the adsorption separation of the COD component, if an oxidizing substance, for example, peroxodisulfuric acid is contained in the wastewater, the adsorbing resin is oxidized and deteriorated.
【０００５】そこで、この吸着樹脂の酸化劣化を防止す
るために、排水中のペルオキソ二硫酸を除去した後、Ｃ
ＯＤの吸着除去を行う方法が提案されている（特願平５
−２２３１２７号，同５−２７８４４１号）が、吸着樹
脂の酸化劣化をより一層確実に防止するためには、ペル
オキソ二硫酸除去後の水のペルオキソ二硫酸濃度を分
析、管理することが必要となる。[0005] Therefore, in order to prevent the oxidative deterioration of the adsorption resin, the peroxodisulfuric acid in the wastewater is removed,
A method of performing adsorption removal of OD has been proposed (Japanese Patent Application No. Hei 5 (1999)).
However, in order to more reliably prevent the oxidative deterioration of the adsorption resin, it is necessary to analyze and control the concentration of peroxodisulfate in water after the removal of peroxodisulfuric acid. .
【０００６】ところで、一般に、排水中の酸化性物質、
例えば残留塩素はＯ−トリジン比色法又はＤＰＤ（Ｎ，
Ｎ−ジエチル−ｐ−フェニレンジアミン硫酸塩）比色法
で定量的に測定可能であることはよく知られている。ま
た、これらのモニタリングには酸化還元電位（ＯＲＰ）
測定などが利用されている。In general, oxidizing substances in wastewater,
For example, residual chlorine can be determined by O-tolidine colorimetry or DPD (N,
It is well known that it can be quantitatively measured by an N-diethyl-p-phenylenediamine sulfate) colorimetric method. In addition, redox potential (ORP) is used for these monitoring.
Measurement is used.
【０００７】一方、排水の酸化性物質がペルオキソ二硫
酸である場合には、従来、その定量分析は酸化還元滴定
法（第二鉄塩滴定法）（高木誠司「定量分析の実験と計
算第２巻」（共立出版社 昭和６０年，５月再訂版）
“容量分析法”ＰＰ３７８／４３１参照）或いはイオン
クロマト法が用いられるのが現状であり、Ｏ−トリジン
比色法及びＤＰＤ比色法で測定できることは知られてい
なかった。On the other hand, when the oxidizing substance in the wastewater is peroxodisulfuric acid, its quantitative analysis has conventionally been carried out by a redox titration method (ferric salt titration method) (Seiji Takagi, "Experiment and Calculation of Quantitative Analysis No. 2"). Volume "(Kyoritsu Shuppansha, 1985, revised version in May)
At present, the "capacitance analysis method" (pp. 378/431) or the ion chromatography method is used, and it has not been known that the measurement can be performed by the O-tolidine colorimetric method or the DPD colorimetric method.
【０００８】[0008]
【発明が解決しようとする課題】排水中のペルオキソ二
硫酸の定量においては、ＯＲＰ測定やＯ−トリジン比色
法のような簡単な方法で検出できることが望まれる。ま
た、特に、前述のＣＯＤ吸着樹脂の酸化劣化防止のため
の水質管理においては、迅速な分析法によって測定でき
ることが望まれる。In the quantification of peroxodisulfuric acid in waste water, it is desired that it can be detected by a simple method such as ORP measurement or O-tolidine colorimetry. In particular, in water quality control for preventing the above-mentioned oxidative deterioration of the COD-adsorbing resin, it is desired that measurement can be performed by a rapid analysis method.
【０００９】しかしながら、従来、ペルオキソ二硫酸の
測定に用いられている酸化還元滴定法は容量分析法であ
るため、１０ｍｇ／ｌ以下の精度での分析は困難であ
り、ＣＯＤ吸着樹脂と接触させる低濃度ペルオキソ二硫
酸含有水中のペルオキソ二硫酸の定量には不適当であっ
た。However, since the redox titration method conventionally used for the measurement of peroxodisulfuric acid is a volumetric analysis method, it is difficult to perform the analysis with an accuracy of 10 mg / l or less, and it is difficult to carry out the analysis with a COD adsorption resin. It was not suitable for the determination of peroxodisulfuric acid in water containing the concentration of peroxodisulfuric acid.
【００１０】また、イオンクロマト法は分析操作が複雑
で、測定に長時間を要す上に、低濃度成分の測定では精
度が悪いという欠点がある。In addition, the ion chromatography method has disadvantages that the analysis operation is complicated, the measurement takes a long time, and the measurement of low concentration components is inaccurate.
【００１１】このように、従来の測定方法では、いずれ
も分析操作に長時間を要す、操作が複雑である、分析精
度が悪いなどの問題があった。As described above, in the conventional measuring methods, there are problems such as that the analysis operation requires a long time, the operation is complicated, and the analysis accuracy is poor.
【００１２】本発明は上記従来の問題点を解決し、排水
中のペルオキソ二硫酸を短時間で容易かつ高精度に測定
することができる排水中のペルオキソ二硫酸の測定方法
を提供することを目的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a method for measuring peroxodisulfuric acid in wastewater, which can easily and accurately measure peroxodisulfuric acid in wastewater. And
【００１３】[0013]
【課題を解決するための手段】本発明の排水中のペルオ
キソ二硫酸の測定方法は、排水中のペルオキソ二硫酸濃
度を測定する方法において、該排水中にＮ，Ｎ−ジエチ
ル−ｐ−フェニレンジアミン硫酸塩とヨウ化カリウムと
を添加して反応させ、反応液の発色度合を比色法により
測定することを特徴とする。The method for measuring peroxodisulfuric acid in waste water according to the present invention is a method for measuring the concentration of peroxodisulfuric acid in waste water, wherein N, N-diethyl-p-phenylenediamine is contained in the waste water. A sulfate and potassium iodide are added and reacted, and the degree of color development of the reaction solution is measured by a colorimetric method.
【００１４】即ち、本発明者らは、ペルオキソ二硫酸の
測定方法について検討を行ったところ、ペルオキソ二硫
酸は、Ｎ，Ｎ−ジエチル−ｐ−フェニレンジアミン硫酸
塩（以下「ＤＰＤ」と称す。）試薬を添加して一定時間
反応させると発色し、その発色量はペルオキソ二硫酸濃
度と相関性があること、従って、ランバート・ベールの
法則が適用でき、比色定量できることを見出し、本発明
を完成させた。That is, the present inventors have studied the method for measuring peroxodisulfuric acid, and found that peroxodisulfuric acid is N, N-diethyl-p-phenylenediamine sulfate (hereinafter referred to as "DPD"). When the reagent is added and allowed to react for a certain period of time, the color develops, and the amount of color development is correlated with the concentration of peroxodisulfuric acid. Therefore, Lambert-Beer's law can be applied and colorimetry can be performed, and the present invention has been completed. I let it.
【００１５】なお、本発明における測定対象であるペル
オキソ二硫酸は、過硫酸とも呼称されているが、具体的
にはペルオキソ二硫酸イオン（Ｓ2 Ｏ8 2- ）として分
析、測定される。The peroxodisulfuric acid to be measured in the present invention is also called persulfuric acid, but is specifically analyzed and measured as peroxodisulfate ion (S 2 O 8 2− ).
【００１６】以下に本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【００１７】本発明の方法においては、検水であるペル
オキソ二硫酸を含有する排水、例えば、排煙脱硫排水、
或いは、排煙脱硫排水のＣＯＤ吸着工程におけるＣＯＤ
吸着樹脂塔入口水の一定量を反応容器に採り、これにｐ
Ｈ調整のためのリン酸塩緩衝液、ＤＰＤ及びヨウ化カリ
ウムの一定量を添加して撹拌し、２０〜３０分間反応さ
せる。In the method of the present invention, a wastewater containing peroxodisulfuric acid as a test water, for example, flue gas desulfurization wastewater,
Alternatively, COD in the COD adsorption process of flue gas desulfurization wastewater
A certain amount of water at the inlet of the adsorption resin tower is taken in a reaction vessel, and p
Add a fixed amount of phosphate buffer, DPD and potassium iodide for H adjustment, stir, and react for 20 to 30 minutes.
【００１８】ここで、検水の採取量は、１０〜５０ｍ
ｌ、特に１０〜２０ｍｌの少量で良い。Here, the amount of sampled water is 10 to 50 m.
l, especially a small amount of 10 to 20 ml.
【００１９】また、リン酸塩緩衝液としては、ｐＨ６．
０〜７．０、好ましくはｐＨ６．５のものを０．５〜
２．０ｍｌ添加する。The phosphate buffer may have a pH of 6.0.
0 to 7.0, preferably 0.5 to pH 6.5
Add 2.0 ml.
【００２０】ＤＰＤとしては、市販のＤＰＤ希釈粉末を
用いることができ、ＤＰＤ希釈粉末の添加量は０．１〜
０．５ｇ程度が好ましい。また、ヨウ化カリウムの添加
量は０．１〜０．５ｇとするのが好ましい。As the DPD, a commercially available DPD diluted powder can be used.
About 0.5 g is preferable. Further, the amount of potassium iodide added is preferably 0.1 to 0.5 g.
【００２１】このように検水にリン酸塩緩衝液とＤＰＤ
粉末とヨウ化カリウムとを添加すると、２０〜３０分後
に、反応液は安定した赤色を呈する。この発色の度合
は、検水中のペルオキソ二硫酸濃度に比例するため、こ
の反応液を比色することにより、容易にペルオキソ二硫
酸濃度を求めることができる。Thus, phosphate buffer and DPD were used for the test.
When the powder and potassium iodide are added, the reaction solution shows a stable red color after 20 to 30 minutes. Since the degree of the color development is proportional to the concentration of peroxodisulfuric acid in the test water, the concentration of peroxodisulfuric acid can be easily obtained by comparing the color of the reaction solution.
【００２２】[0022]
【作用】本発明者らの研究により、ペルオキソ二硫酸を
含む排水にＤＰＤ試薬を添加すると２０〜３０分経過
後、ペルオキソ二硫酸濃度に応じた一定の発色量で安定
した赤色を示すことが判明した。According to the study of the present inventors, it has been found that when the DPD reagent is added to the wastewater containing peroxodisulfuric acid, a stable red color is obtained at a constant color development amount according to the peroxodisulfuric acid concentration after 20 to 30 minutes. did.
【００２３】即ち、ＤＰＤフェニレンジアミンは、ペル
オキソ二硫酸によって下記反応式に従って酸化され赤色
を呈すが、この赤色の発色量は、図２に示すペルオキソ
二硫酸の検量線からも明らかなように、ペルオキソ二硫
酸濃度に比例する。That is, DPD phenylenediamine is oxidized by peroxodisulfuric acid according to the following reaction formula to give a red color. It is proportional to the concentration of disulfuric acid.
【００２４】[0024]
【化１】 Embedded image
【００２５】[0025]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。The present invention will be described more specifically with reference to the following examples.
【００２６】実施例１ ＤＰＤ比色法（ＪＩＳ−０１０１ ２８．２、（１）に
準ずる）によりペルオキソ二硫酸の検量線を作製した。
用いた試薬等、並びに操作法は次の通りである。Example 1 A calibration curve of peroxodisulfuric acid was prepared by a DPD colorimetric method (according to JIS-0101 28.2, (1)).
The used reagents and the like and the operation method are as follows.
【００２７】試薬：リン酸塩緩衝液、ＤＰＤ希釈粉末、
ヨウ化カリウム 器具：５０ｍｌ比色管及び比色管立 計器：分光光度計 操作法： リン酸塩緩衝液（ｐＨ＝６．５）０．５ｍｌを２本
の比色管にそれぞれ入れ、これにＤＰＤ希釈粉末約０．
５ｇを加える。１本の比色管には検水の適量（１０ｍ
ｌ）を加え、栓をして振り混ぜる。別の比色管には同様
に純水１０ｍｌを加え、栓をして振り混ぜこれを対象液
用とする。Reagents: phosphate buffer, DPD diluted powder,
Potassium iodide Apparatus: 50 ml colorimeter tube and colorimeter tube instrument: spectrophotometer Operation method: Put 0.5 ml of phosphate buffer (pH = 6.5) into each of the two colorimeter tubes. DPD diluted powder approx.
Add 5 g. One colorimeter tube has an appropriate amount of water sample (10m
Add l), stopper and shake. Similarly, 10 ml of pure water is added to another colorimetric tube, stoppered, shaken, and used as the target liquid.
【００２８】 検水、及び対象液の栓をとり、ヨウ化
カリウム約０．５ｇを加え、手早く栓をして振り混ぜ
る。[0028] Remove the stopper of the test solution and the target solution, add about 0.5g of potassium iodide, quickly stopper and shake.
【００２９】 あらかじめ準備してある分光光度計を
用い、直ちに２つのセル（幅１０ｍｍ）にそれぞれの液
を移す。波長５３０ｎｍにて対象液のセルをゼロ調整し
た後、発色した検水のセルについて５分経過毎に吸光度
を記録する。吸光度が０．９以上に達するときは検水を
希釈調整して再操作する。Using a spectrophotometer prepared in advance, each liquid is immediately transferred to two cells (width 10 mm). After zero-adjusting the cell of the target liquid at a wavelength of 530 nm, absorbance is recorded every 5 minutes with respect to the colored test cell. When the absorbance reaches 0.9 or more, adjust the dilution of the sample and repeat the procedure.
【００３０】 吸光度は発色３０分後の吸光度で測定
し記録する。The absorbance is measured and recorded as the absorbance 30 minutes after color development.
【００３１】その結果、図２に示す検量線が得られ、ペ
ルオキソ二硫酸濃度と発色量が比例し、ペルオキソ二硫
酸のＤＰＤによる比色分析が可能であることが確認され
た。As a result, the calibration curve shown in FIG. 2 was obtained, and it was confirmed that the concentration of peroxodisulfuric acid was proportional to the amount of coloring, and that colorimetric analysis of peroxodisulfuric acid by DPD was possible.
【００３２】実施例２ 図１に示す測定装置により排水中のペルオキソ二硫酸の
自動分析を上記実施例１のＤＰＤ比色法に準じて行っ
た。Example 2 Automatic analysis of peroxodisulfuric acid in waste water was performed according to the DPD colorimetric method of Example 1 using the measuring apparatus shown in FIG.
【００３３】図１中、１は検水定量サンプラー、２は試
薬注入ポンプ、３は反応試薬貯留槽、４はマグネチック
スターラー４Ａを備える反応容器、５はデジタル比色
計、６は流通式セル、Ｖ1 ，Ｖ2 ，Ｖ3 は電磁弁であ
り、１１〜１７の各符号は配管を示す。In FIG. 1, 1 is a sampler for measuring and measuring a sample, 2 is a reagent injection pump, 3 is a reaction reagent storage tank, 4 is a reaction vessel equipped with a magnetic stirrer 4A, 5 is a digital colorimeter, and 6 is a flow cell. , V 1 , V 2 , V 3 are solenoid valves, and reference numerals 11 to 17 indicate pipes.
【００３４】測定方法は次の通りである。The measuring method is as follows.
【００３５】まず、電磁弁Ｖ1 を開として、排水循環ラ
イン１１，１２に組み込まれた排水の一定量を検水とし
て取り出し、配管１３より反応容器４に投入する（な
お、この一定量とは１０〜５０ｍｌが好ましい。本実施
例では１０ｍｌ又は２０ｍｌとした。）。[0035] First, the solenoid valve V 1 is opened, take out a certain amount of waste water incorporated in the waste water circulation line 11 and 12 as test water are charged from line 13 to reaction vessel 4 (Incidentally, this fixed amount is It is preferably 10 to 50 ml, and in this example, it was 10 or 20 ml.)
【００３６】次に、電磁弁Ｖ2 を開として、反応試薬貯
留槽３内の反応試薬の一定量を試薬注入ポンプ２によ
り、配管１４，１５を経て反応容器４に投入し、マグネ
チックスターラー４Ａで撹拌する。Next, the solenoid valve V 2 is opened, and a certain amount of the reaction reagent in the reaction reagent storage tank 3 is charged into the reaction container 4 via the pipes 14 and 15 by the reagent injection pump 2, and the magnetic stirrer 4 A And stir.
【００３７】本実施例において、この一定量とは、リン
酸塩緩衝液０．５ｍｌ及びＤＰＤ希釈粉末０．５ｇ、ヨ
ウ化カリウム０．５ｇである。なお、図１においては反
応試薬貯留槽及び試薬注入ポンプ等の試薬注入設備が１
組のみ示されているがこれらは各試薬毎に設けられてい
る。また、反応容器４のマグネチックスターラー４Ａの
撹拌は例えば５０ｒｐｍで常時作動するものであっても
良く、また、検水が投入されると同時に、電気計装で連
動するものであっても良い。In this embodiment, the predetermined amounts are 0.5 ml of phosphate buffer, 0.5 g of DPD diluted powder, and 0.5 g of potassium iodide. In FIG. 1, one reagent injection facility such as a reaction reagent storage tank and a reagent injection pump is provided.
Although only sets are shown, these are provided for each reagent. Further, the stirring of the magnetic stirrer 4A of the reaction vessel 4 may be always operated at, for example, 50 rpm, or may be interlocked with the electrical instrumentation at the same time as the water sample is supplied.
【００３８】反応容器４内で１５〜３０分の範囲で一定
時間反応させた後は、電磁弁Ｖ3 が開き、反応容器４内
の発色した反応液をデジタル式比色計５の流通式セル６
に流入させて比色する。After reacting for a predetermined time in the range of 15 to 30 minutes in the reaction vessel 4, the solenoid valve V 3 is opened, and the colored reaction solution in the reaction vessel 4 is passed through the flow cell of the digital colorimeter 5. 6
And colorimetrically.
【００３９】上記方法により、下記排水を検水としてペ
ルオキソ二硫酸濃度を求め、結果を表１に示した。The concentration of peroxodisulfuric acid was determined by the above method using the following waste water as a sample, and the results are shown in Table 1.
【００４０】Ｉ：Ａ火力発電所の排煙脱硫排水（ＣＯＤ
吸着塔の入口水） II：Ｂ火力発電所の排煙脱硫排水（シックナーオーバー
フロー水） なお、Ｂ火力発電所の排煙脱硫排水はＳＳを含むため、
排水循環ラインの配管１１に濾過手段を取り付けてＮ
ｏ．５Ｃ濾紙で濾過し、濾過水を検水定量サンプラー１
に受けた。I: Flue gas desulfurization effluent (COD) of thermal power plant A
(Inlet water of adsorption tower) II: Flue gas desulfurization effluent of B thermal power plant (thickener overflow water) Since flue gas desulfurization effluent of B thermal power plant contains SS,
Attach filtration means to pipe 11 of drainage circulation line and
o. Filter with 5C filter paper and filter the water.
Received
【００４１】また、上記排水Ｉ，IIについて、従来の第
二鉄塩滴定法によりペルオキソ二硫酸濃度の測定を行
い、結果を表１に併記した。The concentration of peroxodisulfuric acid in the wastewaters I and II was measured by a conventional ferric salt titration method, and the results are shown in Table 1.
【００４２】[0042]
【表１】 [Table 1]
【００４３】本実施例によるＤＰＤ比色法及び従来の第
二鉄塩滴定法について、検水量、試薬量、測定の難易度
を調べ、結果を表２に示した。With respect to the DPD colorimetric method according to the present embodiment and the conventional ferric salt titration method, the amount of water sample, the amount of reagent, and the difficulty of measurement were examined.
【００４４】[0044]
【表２】 [Table 2]
【００４５】表１，２より、本発明の方法によれば、排
水中のペルオキソ二硫酸濃度を低濃度であっても、短時
間で容易かつ高精度に測定することができることが明ら
かである。From Tables 1 and 2, it is clear that the method of the present invention can easily and accurately measure the concentration of peroxodisulfuric acid in wastewater in a short time even if the concentration is low.
【００４６】[0046]
【発明の効果】以上詳述した通り、本発明の排水中のペ
ルオキソ二硫酸の測定方法によれば、排水中のペルオキ
ソ二硫酸濃度をＤＰＤ比色法により短時間で容易に、し
かも低濃度ペルオキソ二硫酸であっても精度良く測定す
ることができる。As described in detail above, according to the method for measuring peroxodisulfuric acid in wastewater of the present invention, the concentration of peroxodisulfuric acid in wastewater can be easily determined in a short time by a DPD colorimetric method, and a low concentration of peroxodisulfuric acid can be obtained. Even with disulfuric acid, it can be measured accurately.
【００４７】本発明の排水中のペルオキソ二硫酸の測定
方法は、排煙脱硫排水のＣＯＤ吸着除去工程における吸
着樹脂塔入口水の水質管理等に有用であり、ＣＯＤ吸着
樹脂の酸化劣化原因物質である排水中の低濃度ペルオキ
ソ二硫酸の分析を短時間で容易かつ精度良く行って、Ｃ
ＯＤ吸着樹脂の劣化を確実に防止することができる。The method for measuring peroxodisulfuric acid in wastewater according to the present invention is useful for controlling the quality of water at the inlet of an adsorption resin tower in the COD adsorption and removal step of flue gas desulfurization wastewater. Analysis of low-concentration peroxodisulfuric acid in a certain wastewater is performed easily and accurately in a short time, and C
Deterioration of the OD adsorption resin can be reliably prevented.
【００４８】[0048]
【図１】実施例で用いた測定装置を示す系統図である。FIG. 1 is a system diagram showing a measuring device used in an example.
【図２】ペルオキソ二硫酸の検量線を示すグラフであ
る。FIG. 2 is a graph showing a calibration curve of peroxodisulfuric acid.
１ 検水定量サンプラー ２ 試薬注入ポンプ ３ 反応試薬貯留槽 ４ 反応容器 ５ デジタル比色計 ６ 流通式セル DESCRIPTION OF REFERENCE NUMERALS 1 Quantitative sampler for sample 2 Reagent injection pump 3 Reagent storage tank 4 Reaction vessel 5 Digital colorimeter 6 Flow-through cell
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 21/78 G01N 31/00 G01N 31/22 ＣＡ（ＳＴＮ) ＷＰＩ（ＤＩＡＬＯＧ)Continuation of the front page (58) Fields investigated (Int. Cl. 7 , DB name) G01N 21/78 G01N 31/00 G01N 31/22 CA (STN) WPI (DIALOG)
Claims (1)
る方法において、該排水中にＮ，Ｎ−ジエチル−ｐ−フ
ェニレンジアミン硫酸塩とヨウ化カリウムとを添加して
反応させ、反応液の発色度合を比色法により測定するこ
とを特徴とする排水中のペルオキソ二硫酸の測定方法。In a method for measuring the concentration of peroxodisulfuric acid in waste water, N, N-diethyl-p-phenylenediamine sulfate and potassium iodide are added to the waste water and reacted to form a color of the reaction solution. A method for measuring peroxodisulfuric acid in waste water, wherein the degree is measured by a colorimetric method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12624894A JP3172745B2 (en) | 1994-06-08 | 1994-06-08 | Method for measuring peroxodisulfuric acid in wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12624894A JP3172745B2 (en) | 1994-06-08 | 1994-06-08 | Method for measuring peroxodisulfuric acid in wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07333153A JPH07333153A (en) | 1995-12-22 |
| JP3172745B2 true JP3172745B2 (en) | 2001-06-04 |
Family
ID=14930476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12624894A Expired - Fee Related JP3172745B2 (en) | 1994-06-08 | 1994-06-08 | Method for measuring peroxodisulfuric acid in wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3172745B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004271472A (en) * | 2003-03-12 | 2004-09-30 | Suido Kiko Kaisha Ltd | Portable water examination device |
| JP5254672B2 (en) * | 2008-06-13 | 2013-08-07 | アプリシアテクノロジー株式会社 | Chemical supply method and chemical supply device |
| JP5773132B2 (en) * | 2011-02-23 | 2015-09-02 | 栗田工業株式会社 | Persulfuric acid concentration measuring method, persulfuric acid concentration measuring device, and persulfuric acid supplying device |
| CN109060786B (en) * | 2018-08-25 | 2023-12-05 | 成都凯天电子股份有限公司 | Detection method for measuring sulfuric acid concentration content of industrial wastewater |
-
1994
- 1994-06-08 JP JP12624894A patent/JP3172745B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07333153A (en) | 1995-12-22 |
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