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Method for detecting hydrogen peroxide in water samples

A hydrogen peroxide and detection method technology, applied in the field of hydrogen peroxide detection, can solve the problems of detection error, deviation of test results, cumbersome measurement process, etc., and achieve the effect of convenient use, accurate measurement, and strong anti-interference

Inactive Publication Date: 2018-08-17
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can accurately detect the concentration of hydrogen peroxide in water samples, but it needs to add a variety of additional chemical reagents, and the measurement process is relatively cumbersome
And if there are other chromogenic, oxidative or reductive interferences in the sample, the test results will be deviated
Wang Kaixiong et al. analyzed hydrogen peroxide by using ion chromatography to measure sulfate after the reaction of sulfite and hydrogen peroxide, but this method is an indirect measurement method, and other oxidizing or reducing substances in the method will interfere or hinder Persulfate reacts with hydrogen peroxide, or reacts directly with hydrogen peroxide, causing detection errors

Method used

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  • Method for detecting hydrogen peroxide in water samples
  • Method for detecting hydrogen peroxide in water samples
  • Method for detecting hydrogen peroxide in water samples

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The ion chromatographic conditions adopted are: the ion chromatograph is IC2010 of Tosoh Company; the guard column is AG-15 of Dion Company; the analytical column is AS-15 chromatographic column of Dion Company; The detector is Shenghan electrochemical membrane suppressor SHY-A-Ⅲ, the detector is Shimadzu SPD 20A ultraviolet detector, the wavelength of the ultraviolet detector is 210nm; the eluent is potassium hydroxide eluent, and its concentration is 10mmol / L; the eluent flow rate is 0.5mL / min; the sample injection volume is 100μL.

[0046] Specific steps include:

[0047] (1) configure hydrogen peroxide standard solution stock solution

[0048] Weigh 33.3333 g of 30% hydrogen peroxide (analytical pure) into a 1000 ml volumetric flask, and obtain 10 g / L hydrogen peroxide standard solution S1 after constant volume.

[0049] Weigh 3.3333 g of 30% hydrogen peroxide (analytical pure) into a 1000 ml volumetric flask, and obtain 1 g / L hydrogen peroxide standard solution ...

Embodiment 2

[0064] The ion chromatographic conditions adopted are the same as those in Example 1.

[0065] Standard curve drawing process is identical with embodiment 1.

[0066] Rainwater samples R1 and R2 were collected at different times and filtered with a 0.45 μm filter membrane. The standard solution S2 prepared in Example 1 and the rainwater sample were used to prepare the rainwater solutions R11, R12, and R21 added with hydrogen peroxide external standard. Among them, R11 is the sample with 0.5 mg / L hydrogen peroxide added to the rainwater sample R1, wherein R12 is the sample with 1 mg / L hydrogen peroxide added to the rainwater sample R1, and R21 is the sample with 1 mg / L hydrogen peroxide added to the rainwater sample R2 / L sample of hydrogen peroxide.

[0067] Measure the content of hydrogen peroxide in R1, R2, R11, R12, R21 by ion chromatography respectively.

[0068] The result is as Figure 4 shown. Figure 4 The method of the present invention is compared with the metho...

Embodiment 3

[0070] The ion chromatographic conditions adopted are: the ion chromatograph is IC2010 of Tosoh Company, the guard column is AG-15 of Diane Company; the analytical column is AS-15 chromatographic column of Diane Company, and the AZ chromatographic column of Tosoh Company; the chromatographic column thermostat The temperature is 30 degrees Celsius; the suppressor is Shenghan electrochemical membrane suppressor SHY-A-Ⅲ; the detector is Shimadzu SPD 20A ultraviolet detector, and the wavelength of the ultraviolet detector is 200-230nm; two eluents, one One is a sodium hydroxide eluent with a concentration of 10mmol / L, and the other is a mixed eluent with 1.9mmol / L sodium bicarbonate and 3.2mmol / L sodium carbonate; the sample injection volume is 100μL.

[0071] (1) The eluent is selected as 10mmol / L sodium hydroxide eluent, the wavelength of the ultraviolet detector is 210nm, and when the flow rate is 0.5ml / min, AS-15 chromatographic column and AZ chromatographic column are used res...

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Abstract

The invention provides a detection method for precisely measuring hydrogen peroxide in water samples through an ion chromatograph. Hydrogen peroxide is a common chemical raw material and can be used for oxidization, bleaching, sterilization and the like, so that accurate and convenient detection of hydrogen peroxide in the water samples has an important practical application significance, but an existing hydrogen peroxide detection method is complicated in operation and high in time consumption and requires addition of chemical substances for reaction with hydrogen peroxide to obtain detectionsignals, which brings inconvenience to practical application of the detection method. The detection method for precisely measuring hydrogen peroxide in the water samples through the ion chromatographincludes steps: converting hydrogen peroxide in alkaline leacheate into an ionic state; separating hydrogen peroxide ions from other ions and neutral substances through an ion chromatographic column;converting hydrogen peroxide in the ionic state into a molecular state through a suppressor; finally, adopting an ultraviolet detector for quantitative detection. Since adding other chemical substances into the water samples is avoided, the detection method has advantages of simplicity and convenience in operation and high interference resistance.

Description

technical field [0001] The invention relates to the detection of hydrogen peroxide, in particular to a method for detecting hydrogen peroxide in water samples. Background technique [0002] Hydrogen peroxide is a commonly used chemical raw material with multiple uses such as oxidation and bleaching. The detection of hydrogen peroxide has attracted much attention in many fields such as food science, industrial process, and environmental chemistry. Existing detection techniques for hydrogen peroxide in water samples include: titration, spectrophotometry, fluorescence, chemiluminescence, electrochemical and liquid chromatography. These methods will encounter some problems in actual use, such as cumbersome operation, long time-consuming, need to add a variety of additional agents, etc., which is not conducive to practical application. [0003] A method for detecting hydrogen peroxide in water samples is disclosed in Chinese invention patent application publication CN 201310154...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/96
CPCG01N30/96G01N30/74
Inventor 不公告发明人
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL