Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for rapidly determining content of sulfite in industrial sulfuric acid

A technology of industrial sulfuric acid and sulfite, which is applied in the field of chemical analysis and detection, can solve the problems of unsatisfactory detection requirements, high detection limit, and poor measurement accuracy, so as to avoid low analysis results, expand the detection limit, and overcome system errors. Effect

Pending Publication Date: 2020-11-03
武汉钢铁有限公司
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has two limitations, one is the high detection limit, and the other is the poor measurement accuracy, which can no longer meet the current detection needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for rapidly determining content of sulfite in industrial sulfuric acid
  • Method for rapidly determining content of sulfite in industrial sulfuric acid
  • Method for rapidly determining content of sulfite in industrial sulfuric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Clean the Erlenmeyer flask, add 5mL of sulfite standard solution (1.00mg / mL), add water to 200mL, and slowly add 2g of industrial sulfuric acid sample (accurate to 0.0001g when weighing) while shaking the flask. Add 5mL of starch-potassium iodide indicator, and add a magnetic stirring bar. Install the experimental device (see figure 2 ). Place the Erlenmeyer flask above the magnetic stirrer, and close the rubber stopper on the mouth of the Erlenmeyer flask. The rubber plugs are respectively connected to two glass air guide tubes (one for air intake and one for air outlet) and a burette. The inlet pipe is connected to nitrogen, and the height of the inlet pipe is controlled to be completely submerged in the liquid but does not touch the magnetic stirring bar in operation. Add potassium iodate standard titration solution into the burette, adjust to zero, then extend the burette vertically into the rubber stopper, and fix the Erlenmeyer flask and the burette with a tit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention particularly relates to a method for rapidly determining the content of sulfite in industrial sulfuric acid, which belongs to the technical field of chemical analysis and detection, andcomprises the following steps: taking an industrial sulfuric acid sample with the mass of m, and performing preparing to obtain a solution to be detected; titrating the to-be-detected solution by adopting a closed titration device to obtain the volume V of a standard titration solution consumed at a titration end point; setting a blank test group, and obtaining the volume V0 of the standard titration solution consumed at the titration end point; obtaining the content of sulfite in the industrial sulfuric acid according to m, V and V0; the closed titration device comprises a conical flask, a rubber plug, a glass gas-guide tube, a burette and a magnetic stirrer, wherein the rubber plug is tightly plugged at the opening of the conical flask; the glass gas-guide tube and the burette respectively penetrate through the rubber plug, so that one end of the glass gas-guide tube and one end of the burette extend into the conical flask and are respectively used for introducing nitrogen, discharging oxygen and titrating a solution of the conical flask; and the magnetic stirrer is positioned at the bottom of the conical flask and is used for stirring the solution in the conical flask.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, in particular to a method for quickly measuring the content of sulfite in industrial sulfuric acid. Background technique [0002] The high content of sulfite in industrial sulfuric acid is one of the main reasons for the inconsistency of its color, especially the redness of sulfuric acid. The chromaticity of industrial sulfuric acid is an important detection index in the current national standard. As one of the delivery indicators, if this indicator is not met, it means that the sulfuric acid cannot be shipped. The common chromaticity incompatibility mainly refers to the redness, blackness or greenness of sulfuric acid. The redness of sulfuric acid is due to the reducing property of sulfite, which can reduce selenous acid dissolved in sulfuric acid to amorphous selenium, which is caused by the scarlet color of selenium. Therefore, by optimizing the detection technology o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/162
Inventor 郑凤余卫华周郑李杰于录军张穗忠卢文琪潘菁
Owner 武汉钢铁有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com