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

Method for detecting high-concentration copper ions by spectrophotometric method

A technology of spectrophotometry and copper ions, which is applied in the direction of color/spectral characteristic measurement, measuring devices, and analysis materials, can solve problems such as low absorbance value, decreased measurement accuracy, measurement interference, etc., and achieves a good linear relationship, Simple operation and sensitive detection effect

Pending Publication Date: 2022-05-27
QILU UNIV OF TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the copper reagent method, when the concentration of copper ions is high, its absorbance value is not high and has no linear relationship with the concentration, that is, it does not conform to the Lambert-Beer law, and is not suitable for the detection of high-concentration copper ion aqueous solutions, which limits the application. scope
[0007] 2. The UV spectral lines of the chromogenic agent and the complex overlap, causing serious measurement interference
Although the measurement of the copper ion concentration can be carried out according to the difference between the two, the amount of xylenol orange in the measurement will be strictly controlled to reduce the error, otherwise the accuracy of the measurement will be reduced (see figure 1 shown)

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 high-concentration copper ions by spectrophotometric method
  • Method for detecting high-concentration copper ions by spectrophotometric method
  • Method for detecting high-concentration copper ions by spectrophotometric method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Spectrophotometric method to detect high concentrations of copper ions:

[0033] Add imidazole solution to the water body containing copper ions, the concentration of imidazole solution is 60g / L, the volume ratio of copper ion-containing water and imidazole solution is 1:1, mix well and let stand to obtain the sample solution to be tested, directly use Spectrophotometry, at the wavelength of 610nm, use UV spectrophotometry to measure the absorbance of the sample solution to be tested.

experiment example

[0035] 1. Determination of the working range of the standard curve

[0036] (1) Preparation of known copper ion solution: dissolve 2.014g, 1.343g, 0.671g, 0.134g, 0.067g of CuCl in deionized water, respectively 2 ·2H 2 O in a 1L volumetric flask, dilute to volume with deionized water to obtain 750mg / L, 500mg / L, 250mg / L, 50mg / L, 25mg / L copper ion aqueous solutions, and use deionized aqueous solution as the reference solution;

[0037] (2) Preparation of imidazole aqueous solution: Accurately weigh 3 g of imidazole, and dilute to volume with deionized water in a 50 mL volumetric flask to obtain a 60 g / L imidazole solution.

[0038] (3) preparation of the aqueous solution of imidazole-copper complex: respectively take 2 mL of copper ion aqueous solutions of different concentrations, add 2 mL of imidazole solution, mix well and let stand for 5 min to obtain an aqueous solution of imidazole-copper complex;

[0039] (4) Measuring instruments and methods:

[0040] Instrument: UV-5...

Embodiment 2

[0076] The method for detecting high-concentration copper ions with the spectrophotometry described in Example 1, the difference is:

[0077] The concentration of the imidazole solution was 40 g / L.

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

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for detecting high-concentration copper ions by spectrophotometry, which comprises the following steps: adding an imidazole or substituted imidazole solution into a water body containing copper ions, uniformly mixing and standing to obtain a sample solution to be detected, and directly measuring the concentration of the copper ions by spectrophotometry according to the absorbance of the sample solution to be detected, the detection method provided by the invention realizes rapid, timely and sensitive detection of copper ions in a solution, the detection is accurate, the sensitivity is high, the operation is simple, the imidazole-copper ion complex has an obvious absorption peak at 610nm, the linear response interval of the peak is relatively large, UV spectral lines before and after coordination are not overlapped, and the detection result is accurate. After imidazole and copper ions are coordinated, the absorbance and the concentration are both in a linear relationship, and R2gt; the linear relation of a standard curve is good, and the method is suitable for quantitative measurement in a relatively large copper ion concentration range.

Description

technical field [0001] The invention relates to a method for detecting high-concentration copper ions by spectrophotometry, and belongs to the technical field of water body detection. Background technique [0002] With the rapid growth of the world's population and the increasing scarcity of available freshwater resources, as well as stricter regulations from environmental regulators, there is an increasing need to improve the performance of water treatment technologies. However, industrial activities discharge a large amount of wastewater containing heavy metal ions, resulting in degraded water quality and even harmful effects on living organisms. After heavy metal ions enter the human body and accumulate to a certain limit, it may cause serious diseases. Therefore, the establishment of a fast and efficient heavy metal ion detection method is not only conducive to grasping the paths and characteristics of the transmission and migration of heavy metals, but also provides th...

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): G01N21/78G01N21/33
CPCG01N21/78G01N21/33G01N2021/775
Inventor 马烽侯王旭杨鹏飞李俊英田浩然陈光许
Owner QILU UNIV OF TECH
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