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

Method for determining titanium content in copper alloy

A measurement method, copper alloy technology, applied in the preparation of test samples, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., can solve the problem of decreased accuracy and color development. Insufficient stability of the agent hydrogen peroxide, color interference and other problems

Inactive Publication Date: 2010-05-19
上海电气集团上海电机厂有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection limit of titanium content in hydrogen peroxide spectrophotometry is 0.30%, increasing the detection limit will reduce the accuracy of the method
Moreover, this method has certain limitations: nickel, cobalt, iron and trivalent chromium ions in copper alloys all have color interference, which must be eliminated by using a test solution without hydrogen peroxide as a reference; Agent hydrogen peroxide itself is not stable enough, it will decompose and disproportionate at normal temperature (2H 2 o 2 =2H 2 O+O 2 ↑), when the solution contains trace impurities or some heavy metal ions such as: Cu 2+ 、Cr 3+ , Fe 2+ and Mn 2+ etc. can accelerate its decomposition and affect the stability of color development

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 determining titanium content in copper alloy
  • Method for determining titanium content in copper alloy
  • Method for determining titanium content in copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (verify the best assay condition of the assay method of titanium content in the copper alloy of the present invention):

[0033] Pipette 10.00ml of titanium standard solution into a 50ml measuring flask, add 10.00ml of bottom solution, and add water to about 30ml.

[0034] Then add 1ml of ascorbic acid solution, drop a drop of bromophenol blue indicator, adjust to just blue with ammonia water, immediately adjust to yellow with hydrochloric acid and add 1 drop, add 6ml of acetic acid solution, shake well; accurately add 2.00ml of color-changing acid solution , dilute with water to the mark of the measuring bottle, and shake well.

[0035] Pour the color-developing solution into a 1cm cuvette, add 1-2 drops of ammonium fluoride solution to the remaining solution to remove the color of the complex, and use this as the reference solution.

[0036] Use a photometer to read the absorbance of the above-mentioned chromogenic solution and reference solution at diff...

Embodiment 2

[0039] Embodiment 2 (verify the measurement range of the assay method of titanium content in the copper alloy of the present invention is wide):

[0040] Pipette 0.00ml, 2.00ml, 4.00ml, 6.00ml, 8.00ml, 10.00ml titanium standard solution, place in 6 50ml volumetric flasks, add 10.00ml of bottom solution respectively, operate according to the test procedure of embodiment 1 respectively, read Measure the absorbance and draw the working curve.

[0041] as table 1 and figure 2 As shown, the test results show that under the test conditions, the titanium content obeys Beer's law in the range of 0-100 μg, and it can be concluded that the method for measuring the titanium content in the copper alloy of the present invention has the advantage of a wide range of measurement. However, as shown in Table 2, other measuring methods have relatively narrow measuring ranges.

[0042] Table 1: Ti content / ug~absorption A relationship table

[0043] Ti content / ug

0

20

...

Embodiment 3

[0046] Embodiment 3 (verify the accuracy of the assay method of titanium content in the copper alloy of the present invention is high)

[0047] Weigh 0.2000 g of the copper alloy standard sample (the standard value of titanium in the copper alloy standard sample is 0.51%) and place it in a 100 ml measuring bottle, add 15 ml of nitric acid, heat to dissolve, add 5 ml of urea solution, cool, and dilute to the scale of the measuring bottle , shake well. Pipette 10.00ml of this solution into a 50ml measuring bottle, add water to about 30ml, then add 1ml of ascorbic acid solution, drop a drop of indicator, adjust to just blue with ammonia water, immediately adjust to yellow with hydrochloric acid and add 1 drop in excess, Add 6ml of acetic acid solution and shake well. Accurately add 2.00ml of color-changing acid solution, dilute with water to the mark of the measuring bottle, and shake well. Pour the chromogenic solution into a 1cm cuvette. Add 1 to 2 drops of ammonium fluoride...

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 titanium content measuring method of copper alloys, which comprises the following steps: A. a copper alloy sample is weighed and dissolved; B. a solution that is obtained from step A is added into an ascorbic acid solution, pH value of the solution is adjusted between 1.5 and 2.5, and a chromotropic acid solution is further added; C. the solution that is obtained from step B is partly poured into a cuvette and taken as a visualization reagent, a complex compound formed by the titanium and the chromotropic acid is removed from the residue solution, and the residue solution is taken as a reference liquid; and D. a photometer is used for simultaneously measuring the visualization reagent and the reference liquid, absorbency values are measured and read, and the titanium content in the copper alloy is computed according to the absorbency values. The titanium content measuring method of the copper alloys has the advantages of stable color development, good result repeatability, high accuracy and wide measurement range.

Description

technical field [0001] The invention relates to metal detection and inspection, in particular to a method for measuring titanium content in copper alloys. Background technique [0002] The determination of titanium is mainly based on photometry. Existing spectrophotometric methods for the determination of titanium include hydrogen peroxide spectrophotometry and diantipyridine spectrophotometry, both of which have relatively narrow measurement ranges. The detection limit of titanium content in hydrogen peroxide spectrophotometry is 0.30%, increasing the detection limit will reduce the accuracy of the method. Moreover, this method has certain limitations: nickel, cobalt, iron and trivalent chromium ions in copper alloys all have color interference, which must be eliminated by using a test solution without hydrogen peroxide as a reference; Agent hydrogen peroxide itself is not stable enough, it will decompose and disproportionate at normal temperature (2H 2 o 2 =2H 2 O+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 Patents(China)
IPC IPC(8): G01N21/78G01N1/28
Inventor 袁萍陈娥
Owner 上海电气集团上海电机厂有限公司
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