Method for detecting chromium content in a chromium passivation waste liquid

A detection method and a technology of chromium content, which are applied in the field of chemical analysis, can solve the problems that the chromium content of chromium passivation waste liquid cannot be detected, and achieve the effect of simple operation and strong operability

Active Publication Date: 2018-09-25
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a detection method for the chromium content in the chromium passivation waste liquid, which mainly solves the technical problem that the chromium content in the chromium passivation waste l

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 detecting chromium content in a chromium passivation waste liquid
  • Method for detecting chromium content in a chromium passivation waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] A method for detecting chromium content in chromium passivation waste liquid, comprising the following steps:

[0015] 1) Prepare the solution to be tested, weigh 10.0053g of chromium passivation waste solution and place it in a platinum crucible, first remove the moisture and organic resin in the sample, specifically, first heat the sample from 20°C at a heating rate of 4°C / min Heat to 105°C and hold for 180 minutes; then heat the sample from 105°C to 250°C at a heating rate of 8°C / min and hold for 15 minutes; then heat the sample from 250°C to 500°C at a heating rate of 8°C / min and hold for 30 minutes ; Finally, heat the sample from 500°C to 815°C at a heating rate of 10°C / min, and keep it warm for 120min; then add 3g of a mixed reagent of sodium carbonate and boric acid with a mass ratio of 2:1 to the platinum crucible; then put the platinum crucible Place in a high-temperature furnace and melt at 1000°C for 15 minutes, take out the platinum crucible from the high-te...

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 discloses a method for detecting the chromium content in a chromium passivation waste liquid. In the prior art, the chromium content in the chromium passivation waste liquid cannot be detected in the prior art. A purpose of the present invention is mainly to solve the technical problem in the prior art. The technical scheme is that the method comprises: preparing a to-be-detected solution; sequentially adding a phosphoric acid solution, a silver nitrate solution and an ammonium persulfate solution to the to-be-detected solution; adding a hydrochloric acid solution to the mixed solution containing the to-be-detected solution; adding an N-phenylanthranilic acid solution to the mixed solution containing the to-be-detected solution, carrying out titration on the mixed solution containing the to-be-detected solution by using an ammonium iron(II) sulfate standard solution until the solution is completely bright green, stopping the titration, and reading the titration volume; and calculating the chromium content in the to-be-detected chromium passivation waste liquid. With the method of the present invention, the chromium content in the chromium passivation waste liquid canbe accurately determined, the interference caused by a large amount of organic resins can be avoided, the detection data is accurate and reliable, and the scientific basis can be provided for the harmless disposal and effective utilization of the chromium passivation waste liquid.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and relates to a method for detecting chromium content in chromium passivation waste liquid, in particular to a method for detecting chromium in chromium passivation waste liquid produced in the production process of cold-rolled hot-dip (aluminum) zinc products content detection method. Background technique [0002] In the production process of cold-rolled hot-dip (aluminum) zinc sheet, in order to improve the anti-corrosion performance of cold-rolled hot-dip (aluminum) zinc sheet, it is usually necessary to passivate the surface of cold-rolled hot-dip (aluminum) zinc, and the chromium passivation solution It has the advantages of simple operation, low cost, easy control, bright color of the formed passivation film, outstanding weather resistance and wear resistance, and self-repair function, so it is widely used. However, a large amount of chromium passivation waste liquid will inevit...

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): G01N31/16G01N1/44
CPCG01N1/44G01N31/16
Inventor 周桂海王海军何晓丽
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap