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Method for rapidly determining content of hydrogen peroxide

A hydrogen peroxide, rapid determination technology, applied in the direction of material analysis by observing the influence of chemical indicators, color/spectral characteristic measurement, analysis by making materials undergo chemical reactions, etc., can solve the problems of accelerating the reaction speed, etc. Achieve the effect of speeding up the reaction speed, eliminating the deposition phenomenon, and eliminating the error

Inactive Publication Date: 2018-04-24
SHANGHAI YIDIAN SCI INSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for quickly measuring the content of hydrogen peroxide aimed at the technical defects of the existing hydrogen peroxide concentration determination method, which is complicated to calibrate and easily produce measurement errors. , without titration and other operations, eliminating the error caused by the titration operation; adding divalent manganese ions to speed up the reaction speed; using sulfuric acid-phosphoric acid mixed acid to eliminate the deposition of low-valent manganese oxides, and eliminate its color contrast. influences

Method used

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Examples

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Embodiment

[0024] a) Preparation method of reagent

[0025] In this example, unless otherwise stated, the reagents used are analytical reagents that meet national standards.

[0026] (1) Preparation of experimental water

[0027] The water used for reagent preparation is water without reducing substances, or water of equivalent purity. Its preparation method is as follows:

[0028] Put 1L of distilled water in an all-glass still, add 2.5mL of concentrated sulfuric acid (ρ=1.84g / mL) and a small amount of potassium permanganate, and distill. Discard 100mL of the initial distillate, and store the remaining distillate in a narrow-mouth bottle with a glass stopper. During the distillation process, the purple red color of potassium permanganate should not disappear, otherwise potassium permanganate should be added in time.

[0029] (2) Hydrogen peroxide calibration solution: ρ=100mg / L

[0030] Accurately pipette 0.3mL of fresh commercially available 30% hydrogen peroxide solution, dilute ...

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Abstract

The invention provides a method for rapidly determining the content of hydrogen peroxide. Determining steps are simple and convenient. Colorimetric determination can be directly performed after reaction without titration and other operations, so that errors caused by titration operation are eliminated; the reaction speed is increased with addition of divalent manganese ions; with adoption of mixedacid of sulfuric acid and phosphoric acid, deposition of low-valence manganese oxides is eliminated, and the influence of deposition on colorimetry is eliminated.

Description

technical field [0001] The invention belongs to the technical field of material component analysis, and in particular relates to a method for quickly measuring hydrogen peroxide content. Background technique [0002] The aqueous solution of hydrogen peroxide, commonly known as hydrogen peroxide, is a colorless and transparent liquid with strong oxidizing properties. It is often used as a disinfectant, bleach, oxidant, etc. It is widely used in the fields of medicine, food, national defense, textile, chemical industry, and environmental protection. In order to safely and effectively control the application of hydrogen peroxide in these fields, it is necessary to quickly and accurately determine the concentration of hydrogen peroxide. [0003] At present, the common analytical methods for determining the concentration of hydrogen peroxide mainly include the following: titration, spectrophotometry, chemiluminescence, fluorescence photometry, chromatography, enzymatic chemistry,...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
CPCG01N21/31G01N21/78
Inventor 马丽
Owner SHANGHAI YIDIAN SCI INSTR