CN102590117A - Method for fast detecting concentration of ozone in water - Google Patents
Method for fast detecting concentration of ozone in water Download PDFInfo
- Publication number
- CN102590117A CN102590117A CN2012100433437A CN201210043343A CN102590117A CN 102590117 A CN102590117 A CN 102590117A CN 2012100433437 A CN2012100433437 A CN 2012100433437A CN 201210043343 A CN201210043343 A CN 201210043343A CN 102590117 A CN102590117 A CN 102590117A
- Authority
- CN
- China
- Prior art keywords
- ozone
- water
- concentration
- abts
- water 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
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
本发明提供了一种快速检测水中臭氧浓度的方法，利用臭氧氧化ABTS（2,2-联氮-双-（3-乙基苯并噻唑啉-6-磺酸）），形成稳定的绿色自由基产物，包括以下步骤：于规格为25mL的比色管中加入一定体积的水样，用去离子水定容至25mL，依次加入1mL硫酸（0.05mol/L）和2mLABTS（1g/L）溶液，摇匀混合、静置1分钟，于405nm处测量吸光度值ΔA，通过计算公式求得水样臭氧浓度。本发明检测水中臭氧浓度不仅灵敏度高、线性范围宽，而且快速、重现性好，可以在环境分析等领域得到发展。
The invention provides a method for quickly detecting the concentration of ozone in water, using ozone to oxidize ABTS (2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid)) to form a stable green free Base product, including the following steps: add a certain volume of water sample to a 25mL colorimetric tube, dilute to 25mL with deionized water, add 1mL of sulfuric acid (0.05mol/L) and 2mL of ABTS (1g/L) solution in sequence , shake to mix, let it stand for 1 minute, measure the absorbance value ΔA at 405nm, and obtain the ozone concentration of the water sample through the calculation formula. The invention detects the ozone concentration in water not only with high sensitivity and wide linear range, but also with high speed and good reproducibility, and can be developed in the fields of environmental analysis and the like.
Description
技术领域 technical field
本发明属于环境监测技术领域，具体地说是利用ABTS试剂被臭氧氧化产生稳定绿色自由基的原理，在405nm处绿色自由基有强吸收，吸光度与臭氧浓度在一定范围内呈线性关系，从而达到测量水中臭氧浓度的目的。 The invention belongs to the technical field of environmental monitoring, and specifically utilizes the principle that the ABTS reagent is oxidized by ozone to generate stable green free radicals. Green free radicals have strong absorption at 405nm, and the absorbance and ozone concentration are in a linear relationship within a certain range, thereby achieving The purpose of measuring the ozone concentration in water.
背景技术 Background technique
臭氧在冷却水除垢、饮用水和污水氧化消毒处理等领域广泛应用。水中微量臭氧的定量检测是臭氧投加量确定、优化和臭氧尾气控制的前提条件。目前，水中臭氧的常用检测方法有碘量法和比色法。 Ozone is widely used in the fields of cooling water descaling, drinking water and sewage oxidation and disinfection treatment. Quantitative detection of trace amounts of ozone in water is a prerequisite for the determination and optimization of ozone dosage and the control of ozone tail gas. At present, the common detection methods of ozone in water include iodometric method and colorimetric method.
碘量法利用臭氧将碘化钾氧化为游离碘，游离碘显色，再用硫代硫酸钠标准液滴定，游离碘变为碘化钠，反应终点为溶液完全褪色。碘量法检测限较高（一般>0.5mg/L），同时水中各种氧化剂均可干扰测定。比色法主要有N,N-二乙基-对-苯二胺（DPD）和靛蓝法，臭氧与DPD溶液反应，生成红色化合物，在510nm处有最佳吸收，但使用DPD法，吸光度在10分钟后略微下降，之后愈加明显，因此需在显色10分钟内测定吸光度，给现场操作带来不便。靛蓝法是较为通用的方法，已被列入国家标准《生活饮用水标准检验方法-消毒剂指标》（GB/T5750.11-2006），其最主要的缺点是靛蓝溶液易失效，且价格昂贵，配制过程繁琐。 The iodometric method uses ozone to oxidize potassium iodide into free iodine, and the free iodine develops color, and then titrates with sodium thiosulfate standard solution, the free iodine becomes sodium iodide, and the reaction end point is complete discoloration of the solution. The detection limit of the iodometric method is relatively high (generally >0.5mg/L), and various oxidants in water can interfere with the determination. Colorimetric methods mainly include N,N-diethyl-p-phenylenediamine (DPD) and indigo method. Ozone reacts with DPD solution to generate a red compound, which has the best absorption at 510nm, but when using DPD method, the absorbance is at After 10 minutes, it decreased slightly, and then became more obvious. Therefore, it is necessary to measure the absorbance within 10 minutes of color development, which brings inconvenience to the on-site operation. The indigo method is a relatively common method, which has been included in the national standard "Standard Test Method for Drinking Water-Disinfectant Index" (GB/T5750.11-2006), and its main disadvantage is that the indigo solution is prone to failure and expensive , the preparation process is cumbersome.
发明内容 Contents of the invention
本发明提供了一种快速检测水中臭氧浓度的方法，解决了传统比色法测定水中臭氧浓度的不足。 The present invention provides a method for quickly detecting the ozone concentration in water, which solves the shortcomings of the traditional colorimetric method for measuring the ozone concentration in water.
为了达到解决上述技术问题的目的，本发明的技术方案是： In order to achieve the purpose of solving the problems of the technologies described above, the technical solution of the present invention is:
一种快速检测水中臭氧浓度的方法，具有以下的过程和步骤： A method for rapidly detecting ozone concentration in water has the following processes and steps:
a)、将一定体积含臭氧水样加入25mL比色管中，去离子水定容至25mL； a) Add a certain volume of ozone-containing water sample into a 25mL colorimetric tube, and dilute to 25mL with deionized water;
b)、依次向比色管中加入1mL硫酸（0.05mol/L）和2mLABTS（1g/L）溶液，摇匀混合、静置1分钟，于405nm处测量吸光度值ΔA； b) Add 1mL of sulfuric acid (0.05mol/L) and 2mL of ABTS (1g/L) solution to the colorimetric tube in sequence, shake well to mix, let stand for 1 minute, measure the absorbance value ΔA at 405nm;
c)、通过计算公式求得水样臭氧浓度。 c) Obtain the ozone concentration of the water sample by calculating the formula.
本发明的原理、特点和优点Principles, features and advantages of the present invention
根据本发明，方法测定臭氧溶液浓度范围为0.03~1.00mg/L，方法检测限为0.023mg/L。 According to the present invention, the concentration range of the ozone solution determined by the method is 0.03-1.00 mg/L, and the detection limit of the method is 0.023 mg/L.
根据本发明，方法ΔA范围为0.01~0.258。 According to the present invention, the method ΔA ranges from 0.01 to 0.258.
根据本发明，ABTS氧化形成的较为稳定的绿色自由基在400-410nm范围内有较高吸收，选取405nm波长。 According to the present invention, relatively stable green free radicals formed by oxidation of ABTS have higher absorption in the range of 400-410nm, and the wavelength of 405nm is selected.
根据本发明，方法所涉试剂均为分析纯。 According to the present invention, the reagents involved in the method are all analytically pure.
根据本发明，臭氧在酸性环境较稳定，本发明在pH=2~4范围内稳定性好。 According to the present invention, ozone is relatively stable in an acidic environment, and the present invention has good stability in the range of pH=2-4.
根据本发明，浑浊水样检测前需使用0.45μm孔径滤膜过滤，较清洁的水样（地表水）无需预处理。 According to the present invention, the turbid water sample needs to be filtered with a 0.45 μm pore size filter membrane before detection, and the cleaner water sample (surface water) does not need pretreatment.
在本发明中，方法测定原理为在酸性条件下（pH=2）ABTS与氧化剂反应，ABTS被氧化形成较为稳定的绿色自由基，反应式为 In the present invention, the determination principle of the method is that ABTS reacts with an oxidizing agent under acidic conditions (pH=2), ABTS is oxidized to form relatively stable green free radicals, and the reaction formula is
O3+ABTS+2H+→H2O+2ABTS++O2 O 3 +ABTS+2H + →H 2 O+2ABTS + +O 2
在本发明中，还具有以下技术特征，计算方法是 In the present invention, it also has the following technical characteristics, the calculation method is
Co3(mg/L)=ΔA×V1/(0.27×V2×L)， C o3 (mg/L)=ΔA×V 1 /(0.27×V 2 ×L),
式中 ΔA为水样吸光度与空白吸光度之差 cm-1；V1为25 mL；0.27为系数；V2为含臭氧水样体积 mL；L为比色皿光程cm。 In the formula, ΔA is the difference in cm -1 between the absorbance of the water sample and the absorbance of the blank; V 1 is 25 mL; 0.27 is the coefficient; V 2 is the volume of the ozone-containing water sample in mL; L is the light path of the cuvette in cm.
本方法与靛蓝法的比较Comparison between this method and the indigo method
根据本发明，取未知臭氧浓度水样（去离子水），分别使用本发明方法和靛蓝法（生活饮用水检验方法—消毒剂指标GB/T5750.11-2006）测定臭氧浓度，随机多次取样，得到图2去离子水样ABTS方法与靛蓝法相关性曲线，R2>0.98，k=1.0478。 According to the present invention, water samples (deionized water) with unknown ozone concentration are taken, and the ozone concentration is measured using the method of the present invention and the indigo method (drinking water test method-disinfectant index GB/T5750.11-2006) respectively, and random multiple sampling , the correlation curve between ABTS method and indigo method for deionized water samples in Figure 2 was obtained, R 2 >0.98, k=1.0478.
根据本发明，取任意未知臭氧浓度水样（自来水），分别使用本发明方法和靛蓝法（生活饮用水检验方法—消毒剂指标GB/T5750.11-2006）测定臭氧浓度，随机多次取样，得到图3自来水样ABTS方法与靛蓝法相关性曲线，R2>0.98，k=0.9037。 According to the present invention, any water sample (tap water) with unknown ozone concentration is taken, and the ozone concentration is measured by the method of the present invention and the indigo method (drinking water test method-disinfectant index GB/T5750.11-2006) respectively, and random multiple sampling, The correlation curve between the ABTS method and the indigo method for the tap water sample in Figure 3 was obtained, R 2 >0.98, k=0.9037.
附图说明 Description of drawings
图1是ABTS标准曲线。 Figure 1 is the ABTS standard curve.
图2是去离子水样ABTS方法与靛蓝法比较。 Figure 2 is a comparison between the ABTS method and the indigo method for deionized water samples.
图3是自来水样ABTS方法与靛蓝法比较。 Figure 3 is a comparison between the ABTS method and the indigo method for tap water samples.
具体实施方式 Detailed ways
以下结合具体实施例，对本发明做进一步说明。 The present invention will be further described below in conjunction with specific embodiments.
于规格为25mL的比色管中加入一定体积的任意含臭氧水样，去离子水定容至25mL，再依次加入1mL硫酸（0.05mol/L）和2mLABTS（1g/L）溶液，摇匀混合、静置1分钟；使用紫外-可见分光光度计（元析UV-5300PC）于405nm处，使用1cm光程比色皿测量吸光度值ΔA，按照公式Co3(mg/L)=ΔA×V1/(0.27×V2×L)计算水样中臭氧浓度，式中 ΔA为水样吸光度与空白吸光度之差 cm-1；V1为25mL；0.27为系数；V2为含臭氧水样体积 mL；L为比色皿光程cm。 Add a certain volume of any ozone-containing water sample into a 25mL colorimetric tube, dilute to 25mL with deionized water, then add 1mL of sulfuric acid (0.05mol/L) and 2mL of ABTS (1g/L) solution in turn, shake well and mix , Stand still for 1 minute; use an ultraviolet-visible spectrophotometer (Yuanyan UV-5300PC) at 405nm, use a 1cm optical path cuvette to measure the absorbance value ΔA, according to the formula C o3 (mg/L)=ΔA×V 1 /(0.27×V 2 ×L) to calculate the ozone concentration in the water sample, where ΔA is the difference cm -1 between the absorbance of the water sample and the absorbance of the blank; V 1 is 25mL; 0.27 is the coefficient; V 2 is the volume of the ozone-containing water sample in mL ; L is the light path cm of the cuvette.
实施例 Example
1.1 标准曲线的绘制 1.1 Drawing of standard curve
a. 臭氧使用液的制备：使用氧气源臭氧发生器产生臭氧和氧气混合气体，通过硅胶管进入反应柱底部的气泡扩散器，含臭氧混合气体与去离子水（Mill-Q超纯水，电导率>10MΩ·cm）充分混合，曝气一定时间，于取样口取出高浓度臭氧水样。 a. Preparation of ozone use liquid: Use an oxygen source ozone generator to generate a mixed gas of ozone and oxygen, which enters the bubble diffuser at the bottom of the reaction column through a silicone tube, mixed gas containing ozone and deionized water (Mill-Q ultrapure water, conductivity rate>10MΩ·cm), fully mixed, aerated for a certain period of time, and a high-concentration ozone water sample was taken from the sampling port.
b. 臭氧使用液的标定：高浓度臭氧水样的标定采用直接分光光度法。直接分光光度法：使用紫外-可见分光光度计（元析UV-5300PC）测量水样258nm处吸光度值A（cm-1，扣除空白值），使用公式C(mol/L)=A(cm-1)÷3000（摩尔吸光系数ε258nm=3000M-1s-1）计算臭氧浓度。本方法中臭氧使用液的浓度为4.76mgO3/L。 b. Calibration of ozone-using liquid: the calibration of high-concentration ozone water samples adopts direct spectrophotometry. Direct spectrophotometry: Use an ultraviolet-visible spectrophotometer (Yuanyan UV-5300PC) to measure the absorbance value A (cm -1 , deducting the blank value) of the water sample at 258nm, and use the formula C(mol/L)=A(cm - 1 )÷3000 (molar absorptivity ε258nm=3000M -1 s -1 ) to calculate the ozone concentration. The concentration of the ozone use liquid in this method is 4.76mgO 3 /L.
c. ABTS分光光度法测定过程：于规格为25mL的比色管中加入不同体积（V2）的臭氧使用液：0、0.05、0.25、0.5、1、2.5和5mL，去离子水定容至25mL，此时各比色管中臭氧浓度为0.000、0.010、0.048、0.095、0.190、0.476、0.952mg/L，再依次加入1mL硫酸（0.05mol/L）和2mLABTS（1g/L）溶液，测试水样最终体积为28mL（V1），摇匀混合、静置1分钟；使用紫外-可见分光光度计（元析UV-5300PC）于405nm处，使用1cm光程比色皿测量吸光度值；实验重复数次，得到标准曲线为C（mg/L）=3.738ΔA（cm-1），即ΔA（cm-1）=12771C（mol/L），其中ΔA为扣除空白吸光度（cm-1），范围在0.002-0.25cm-1之间；C为臭氧浓度，R 2>0.99，ε=12771/(48*1000)，其中12771为标准曲线斜率，48为臭氧摩尔分子量（g/mol），1000为单位换算系数，因此ε=0.27，Co3(mg/L)=ΔA×V1/(0.27×V2×L)计算水样中臭氧浓度。 c. ABTS spectrophotometric measurement process: add different volumes (V 2 ) of ozone use solution: 0, 0.05, 0.25, 0.5, 1, 2.5 and 5mL into a 25mL colorimetric tube, and dilute to At this time, the ozone concentration in each colorimetric tube is 0.000, 0.010, 0.048, 0.095, 0.190, 0.476, 0.952mg/L, and then add 1mL of sulfuric acid (0.05mol/L) and 2mL of ABTS (1g/L) solution in sequence to test The final volume of the water sample is 28mL (V 1 ), shake well and mix, and let it stand for 1 minute; use a UV-Vis spectrophotometer (Yuan Analysis UV-5300PC) to measure the absorbance value at 405nm with a 1cm optical path cuvette; the experiment Repeat several times to obtain a standard curve of C (mg/L) = 3.738ΔA (cm -1 ), that is, ΔA (cm -1 ) = 12771C (mol/L), where ΔA is the absorbance after subtracting the blank (cm -1 ), The range is between 0.002-0.25cm -1 ; C is the ozone concentration, R 2 >0.99, ε=12771/(48*1000), where 12771 is the slope of the standard curve, 48 is the molar molecular weight of ozone (g/mol), 1000 is the unit conversion factor, so ε=0.27, C o3 (mg/L)=ΔA×V 1 /(0.27×V 2 ×L) to calculate the ozone concentration in the water sample.
式中 ΔA为水样吸光度与空白吸光度之差 cm-1；V1为25 mL；0.27为系数；V2为含臭氧水样体积 mL；L为比色皿光程cm。 In the formula, ΔA is the difference in cm -1 between the absorbance of the water sample and the absorbance of the blank; V 1 is 25 mL; 0.27 is the coefficient; V 2 is the volume of the ozone-containing water sample in mL; L is the light path of the cuvette in cm.
1.2 方法检测限 1.2 Method detection limit
本实施例中，取某一低臭氧浓度点，连续测定7次，求得七次标准偏差SD，方法检测限为SD*3.14，计算求得本方法检测限为0.023mg/L。 In this example, a certain low ozone concentration point was taken and measured 7 times in a row, and the standard deviation SD of the seven times was obtained. The detection limit of the method was SD*3.14, and the detection limit of the method was calculated to be 0.023mg/L.
1.3 方法稳定性的检测 1.3 Detection of method stability
本实施例中，反应后的绿色自由基具有较好的稳定性，取低、中、高浓度3个样品，每个样品分别测定1min、30min和60min的浓度值，不同时间测得的浓度标准偏差分别为0.466%、1.177%、1.383%。 In this embodiment, the green free radicals after the reaction have good stability. Three samples with low, medium and high concentrations are taken, and the concentration values of each sample are measured for 1min, 30min and 60min respectively. The concentration standards measured at different times The deviations are 0.466%, 1.177%, and 1.383%, respectively.
1.4 方法精密度的检测 1.4 Detection of method precision
本实施例中，测试方法具有较高精密度，取低、中、高浓度3个样品，每个样品分别测定10次，标准偏差分别为1.175%、3.417%、6.452%。 In this example, the test method has relatively high precision. Three samples with low, medium and high concentrations were taken, and each sample was measured 10 times, and the standard deviations were 1.175%, 3.417%, and 6.452%, respectively.
1.5 任意水样中臭氧浓度的测定 1.5 Determination of ozone concentration in any water sample
本实施例中，于规格为25mL的比色管中加入不同体积（V2）的臭氧使用液，去离子水定容至25mL，再依次加入1mL硫酸（0.05mol/L）和2mLABTS（1g/L）溶液，摇匀混合、静置1分钟，使用紫外-可见分光光度计（元析UV-5300PC）于405nm处，使用比色皿测量吸光度值ΔA，按照公式Co3(mg/L)=ΔA×V1/(0.27×V2×L)计算水样中臭氧浓度。式中 ΔA为水样吸光度与空白吸光度之差 cm-1；V1为25 mL；0.27为系数；V2为含臭氧水样体积 mL；L为比色皿光程cm。 In this example, add different volumes (V 2 ) of ozone solution into a 25mL colorimetric tube, set the volume to 25mL with deionized water, and then add 1mL of sulfuric acid (0.05mol/L) and 2mL of ABTS (1g/ L) solution, shake it well, let it stand for 1 minute, use a UV-visible spectrophotometer (Yuanjie UV-5300PC) at 405nm, use a cuvette to measure the absorbance value ΔA, according to the formula C o3 (mg/L)= ΔA×V 1 /(0.27×V 2 ×L) to calculate the ozone concentration in the water sample. In the formula, ΔA is the difference in cm -1 between the absorbance of the water sample and the absorbance of the blank; V 1 is 25 mL; 0.27 is the coefficient; V 2 is the volume of the ozone-containing water sample in mL; L is the light path of the cuvette in cm.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100433437A CN102590117A (en) | 2012-02-24 | 2012-02-24 | Method for fast detecting concentration of ozone in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100433437A CN102590117A (en) | 2012-02-24 | 2012-02-24 | Method for fast detecting concentration of ozone in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102590117A true CN102590117A (en) | 2012-07-18 |
Family
ID=46479058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100433437A Pending CN102590117A (en) | 2012-02-24 | 2012-02-24 | Method for fast detecting concentration of ozone in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102590117A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937577A (en) * | 2012-10-10 | 2013-02-20 | 上海大学 | Method for detecting trace hydroxylamine in water through ABTS free radical fading spectrophotometry method |
| CN103674872A (en) * | 2012-09-03 | 2014-03-26 | 仓敷纺织株式会社 | Method and apparatus for measuring concentration of advanced-oxidation active species |
| CN106153559A (en) * | 2015-04-16 | 2016-11-23 | 王涛 | A kind of method of ozone content in quick mensuration water body |
| CN109668848A (en) * | 2019-02-27 | 2019-04-23 | 苏州奥特福环境科技有限公司 | A kind of ozone concentration on-line detecting system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57191536A (en) * | 1981-05-22 | 1982-11-25 | Toshiba Corp | Residual ozone concentration meter |
| CN2384218Y (en) * | 1998-11-24 | 2000-06-21 | 武汉大学 | Tester for ozone concentration in water |
| CN1930464A (en) * | 2004-03-12 | 2007-03-14 | Mks仪器股份有限公司 | Ozone concentration sensor |
| CN101004385A (en) * | 2007-01-15 | 2007-07-25 | 山东省科学院海洋仪器仪表研究所 | Method for measuring concentration of liquid phase ozone by mode of oxidizing floating injected ozone |
-
2012
- 2012-02-24 CN CN2012100433437A patent/CN102590117A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57191536A (en) * | 1981-05-22 | 1982-11-25 | Toshiba Corp | Residual ozone concentration meter |
| CN2384218Y (en) * | 1998-11-24 | 2000-06-21 | 武汉大学 | Tester for ozone concentration in water |
| CN1930464A (en) * | 2004-03-12 | 2007-03-14 | Mks仪器股份有限公司 | Ozone concentration sensor |
| CN101004385A (en) * | 2007-01-15 | 2007-07-25 | 山东省科学院海洋仪器仪表研究所 | Method for measuring concentration of liquid phase ozone by mode of oxidizing floating injected ozone |
Non-Patent Citations (2)
| Title |
|---|
| ULRICH PINKERNELL: "METHODS FOR THE PHOTOMETRIC DETERMINATION OF REACTIVE BROMINE AND CHLORINE SPECIES WITH ABTS", 《WAT. RES.》, vol. 34, no. 18, 31 December 2000 (2000-12-31) * |
| YUNHO LEE: "Spectrophotometric determination of ferrate (Fe(VI)) in water by ABTS，Yunho Lee，Water Research", 《WATER RESEARCH》, 31 December 2005 (2005-12-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674872A (en) * | 2012-09-03 | 2014-03-26 | 仓敷纺织株式会社 | Method and apparatus for measuring concentration of advanced-oxidation active species |
| CN103674872B (en) * | 2012-09-03 | 2018-07-06 | 仓敷纺织株式会社 | The method for measurement of concentration and concentration measurement apparatus of advanced oxidation active specy |
| CN102937577A (en) * | 2012-10-10 | 2013-02-20 | 上海大学 | Method for detecting trace hydroxylamine in water through ABTS free radical fading spectrophotometry method |
| CN106153559A (en) * | 2015-04-16 | 2016-11-23 | 王涛 | A kind of method of ozone content in quick mensuration water body |
| CN109668848A (en) * | 2019-02-27 | 2019-04-23 | 苏州奥特福环境科技有限公司 | A kind of ozone concentration on-line detecting system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439267B (en) | A kind of test reagent combination and detection method of dimercurion | |
| CN101806715B (en) | Variable-volume microfluidic chip for colorimetric assay | |
| CN107037045B (en) | Method for rapidly measuring content of hydrogen peroxide in solution | |
| CN105102976B (en) | Micro-fluidic chip for chromium in continuous monitoring water and the survey chromium device comprising it | |
| CN102590117A (en) | Method for fast detecting concentration of ozone in water | |
| CN103411956A (en) | Method for rapidly detecting iodate by surface enhanced Raman spectroscopy and application of method | |
| CN104614370B (en) | A method for rapid detection of nitrite based on nano-gold | |
| CN112697739A (en) | Calibration and calibration method for seawater COD sensor by spectrometry and COD sensor | |
| CN103439279B (en) | Spectrophotometry quantitative analysis method of iodine-starch color-developing system | |
| CN101261231A (en) | A method for measuring the concentration of nitrite nitrogen in solution by nitroaniline fading method | |
| CN113916812A (en) | A kind of determination method of total nitrogen concentration in fresh water | |
| CN102539352A (en) | Determination method of cyanogen in thiocyanate | |
| CN110174397A (en) | A kind of application of colorimetric probe | |
| CN113588803B (en) | Method for rapidly determining sulfite by micro-extraction-ion chromatography | |
| CN107271380A (en) | A kind of method of permanganate concentration in measure water | |
| WO2024007482A1 (en) | Solid reagent for detection of ammonia nitrogen and detection method therefor | |
| CN209961681U (en) | A New Type of Sealed Acidizing Aeration Hydrogen Sulfide Tester | |
| CN107727586A (en) | A kind of method that permanganate indices in water is determined with DPD | |
| CN102539367B (en) | Method for measuring content of protein nitrogen in liquid | |
| CN112945873A (en) | Method for measuring permanganate index of water | |
| RU2567844C1 (en) | Method of determining selenium(iv) | |
| CN104165888A (en) | Method for determining content of sodium chlorate in industrial alkali liquor | |
| CN107764755A (en) | A kind of method that permanganate indices in water is determined with ABTS | |
| CN217846060U (en) | Device for measuring concentration of manganese ions in water | |
| Smart | Measurement of chlorine dioxide with a membrane chemiluminescence cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120718 |