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

Hexavalent chromium detection indicator fluid as well as preparation method and use method thereof

A hexavalent chromium and indicator solution technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problem of low dissolution efficiency and the preparation process of diphenylcarbazide Complicated and other problems, to achieve the effect of no strong corrosion, easy to observe color phenomenon, and good corrosion

Active Publication Date: 2017-07-07
CHINA FIRST AUTOMOBILE
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a hexavalent chromium detection indicator solution, its preparation method and its use method, which effectively solve the technical problems of cumbersome preparation process of diphenylcarbazide and low dissolution efficiency in the prior art, and at the same time improve the hexavalent chromium indicator. Increase the concentration of diphenylcarbazide in the solution and increase its shelf life

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
  • Hexavalent chromium detection indicator fluid as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A method for preparing a hexavalent chromium detection indicating liquid, comprising the following steps: step 1, dissolving diphenylcarbazide in a solvent to obtain an initial solution; step 2, dispersing a pH regulator in a diluent to obtain Mix the solution uniformly; step 3, add the mixed solution to the initial solution, and shake until the solution is evenly mixed to obtain the hexavalent chromium detection indicator solution.

[0023] A method for using a hexavalent chromium detection indicator solution, comprising the following steps: when the hexavalent chromium detection indicator solution is used to detect whether there is hexavalent chromium in a metal coating, take the hexavalent chromium detection indicator solution with a dropper, and pour the hexavalent chromium detection indicator solution into the metal coating Drop 1-2 drops of hexavalent chromium detection indicator solution on it, and observe whether the liquid appears purple. If purple appears on th...

Embodiment 1

[0026] The organic solvent is dimethylacetamide, and the mass ratio of each component is 0.5% of diphenylcarbazide; 30% of organic reagent; 60% of orthophosphoric acid, and the rest is ultrapure water. Add diphenylcarbazide to dimethylacetamide, shake it by hand for a few seconds to dissolve, then add the mixture of orthophosphoric acid and ultrapure water, shake evenly. The prepared hexavalent chromium detection indicator solution was added dropwise to the metal coating surface containing hexavalent chromium, and the dripped liquid was observed after 2 min. It changed from colorless and transparent to purple, which proved that the hexavalent chromium detection indicator solution was effective.

Embodiment 2

[0028] The organic solvent is dimethylformamide, and the mass ratio of each component is 3% of diphenylcarbazide; 10% of organic reagent; 20% of orthophosphoric acid, and the rest is ultrapure water. Add diphenylcarbazide to dimethylformamide, shake it by hand for a few seconds to dissolve, then add orthophosphoric acid, mix well, add ultrapure water and shake evenly. The prepared hexavalent chromium detection indicator solution was added dropwise to the metal coating surface containing hexavalent chromium, and the dripped liquid was observed after 2 min. It changed from colorless and transparent to purple, which proved that the hexavalent chromium detection indicator solution was effective.

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 belongs to the field of rapid hexavalent chromium detection and particularly relates to a hexavalent chromium detection indicator fluid as well as a preparation method and a use method thereof. The hexavalent chromium detection indicator fluid comprises diphenylcarbazide, a solvent, a pH adjusting agent and a diluting agent; the solvent is one of or a mixture of two of any percent mass ratio of dimethylacetamide and dimethylformamide. The hexavalent chromium detection indicator fluid provided by the invention effectively solves the technical problems of tedious current dibenzoyl diglyhydrazine preparation process, low dissolution efficiency and the like; meanwhile, the concentration of diphenylcarbazide in the hexavalent chromium detection indicator fluid is improved, and the shelf life of the hexavalent chromium detection indicator fluid is prolonged.

Description

technical field [0001] The invention belongs to the field of rapid detection of hexavalent chromium, in particular to a hexavalent chromium detection indicator liquid, a preparation method and a use method thereof. Background technique [0002] Hexavalent chromium is highly toxic and extremely harmful to human health. In modern industry, hexavalent chromium widely exists in metal materials or pollutes the environment in the form of solutions. The hexavalent chromium indicator solution is used to detect whether there is hexavalent chromium in metal materials, coating materials, etc., and can qualitatively and quantitatively measure the hexavalent chromium content in various media. [0003] In the prior art, relevant reports have been made on hexavalent chromium indicator liquids. For example, Chinese patent CN104483307A provides a method for configuring hexavalent chromium color developing liquids, dissolving diphenylcarbazide in methanol, ethanol, and acetone , adding a lip...

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
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 应坤凤鹏举王慧娟王静姜伟男
Owner CHINA FIRST AUTOMOBILE
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