Method for detecting concentration of lead ions in solution

A lead ion and solution technology, applied in the field of heavy metal content detection, can solve the problems of inaccurate identification and detection of related ions, unclear electrochemical signals, poor recognition ability, etc., and achieve good electron transfer performance and thermal stability, large Effect of deposition surface area and high sensitivity

Active Publication Date: 2015-04-29
连云港长运纺织材料有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the voltammetric method for detecting metal ions, due to the limitation of the types of electrodes, the detected electrochemical signals are not obvious, the recognition ability is poor, the sensitivity is low, and the detection limit is high, and related ions cannot be accurately identified and detected, such as lead ions.

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 concentration of lead ions in solution
  • Method for detecting concentration of lead ions in solution
  • Method for detecting concentration of lead ions in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Use 5% HNO in all utensils before use 3 Soak overnight, rinse, and dry for later use; the reagents used are of analytical grade, and the experimental water is ultrapure water.

[0047] A method for detecting lead ions in solution, comprising:

[0048] Step 1, modifying the electrode: dissolving the aminated graphene and β-cyclodextrin in water, and ultrasonically treating it to form a mixed solution; dropping the mixed solution onto the surface of a polished glassy carbon electrode, drying it in infrared and cooling it to obtain the working electrode.

[0049] Step 2, establish the lead ion concentration standard curve: prepare multiple standard solutions containing different lead ion concentrations, the lead ion concentrations in the multiple standard solutions are respectively 0mol / L, 1.5×10 -7 mol / L, 2.0×10 -7 mol / L, 3.0×10 -7 mol / L and 1.0×0 -6 mol / L, the auxiliary electrode and the working electrode are inserted into the above-mentioned standard solution, an ele...

Embodiment 2

[0060] The deposition time in embodiment 2 is 420s, and the deposition time in embodiment 3 is 240s, and all the other operation steps are identical with embodiment 1, and wherein, used standard curve is lead ion concentration standard curve, also all does not detect experimental The concentration of lead ions in indoor tap water.

Embodiment 4

[0062] Lead ion concentration standard curve is with the lead ion concentration standard curve in embodiment 1: Y=3.76X-0.14, linear correlation coefficient is 0.995, and detection limit is 9 * 10 -8 mol / L. Namely the operation in step 1 to step 2 is identical with embodiment 1, also includes:

[0063] Step 3. Pretreat the solution to be tested: take river water as the solution to be tested:

[0064] The collected sample is pretreated to remove copper ions to obtain the solution to be tested, and the pretreatment includes:

[0065] After the sample solution was left to stand at 4°C for 2 days, the upper layer solution was taken for testing;

[0066] Cut the charcoal into strips of 1cm-3cm, and wrap it into a filter bag with polyester filter cloth;

[0067] Add the filter bag into the upper layer solution, and after standing for 12 hours, take out the filter bag to obtain the first filtrate;

[0068] After paving 1.0 g of asparagus-sea stone flower mixture modified filter a...

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 content detection of heavy metals and particularly relates to a method for detecting the concentration of lead ions in a solution. The method comprises the following steps: by taking an aminated graphene and beta-cyclodextrin modified glassy carbon electrode as a working electrode, reducing metal ions in the solution by adopting the working electrode and utilizing a square wave stripping voltammetry method, and then performing oxidation detection to obtain a square wave stripping voltammetry curve of the metal ions; reading a current value according to the square wave stripping voltammetry curve of the metal ions, obtaining the concentration of the lead ions in the solution by utilizing a lead ion concentration standard curve. By utilizing the aminated graphene and beta-cyclodextrin modified glassy carbon electrode for detecting the lead ions, the method disclosed by the invention is simple and convenient in detection process, high in sensitivity, low in detection limit and capable of realizing rapid sensitive detection of the lead ions in an actual sample.

Description

technical field [0001] The invention belongs to the field of detection of heavy metal content, and in particular relates to a method for detecting the concentration of lead ions in a solution. Background technique [0002] The heavy metal lead is a harmful environmental pollutant and can be enriched in organisms through the food chain. Lead ions are one of the main environmental pollutants, which are carcinogenic and can cause great harm to human health and the ecological environment. Long-term repeated exposure will cause serious harm to the body, especially the consequences of accidental ingestion are extremely serious. [0003] The detection of lead ions mainly uses techniques such as chromatography and mass spectrometry, but these methods are cumbersome to operate and expensive precision instruments limit their wide application. Therefore, the establishment of a simple, rapid and highly sensitive lead ion detection method has gradually become a research focus. At pres...

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): G01N27/48
Inventor 肖琦黄珊卢双燕
Owner 连云港长运纺织材料有限公司
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