Preparation method of nanogold colorimetric sensor and application of nanogold colorimetric sensor in detection of divalent nickel ions

A colorimetric sensor and nano-gold technology, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of strict sample preservation conditions, high cost of analysis methods, and strong operation expertise, and achieve low cost and operability. The effect of strong sex and good application prospect

Pending Publication Date: 2021-08-27
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
View PDF0 Cites 0 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 solution for the problems of strict sample storage conditions, high cost of analysis methods, long analysis time, and strong professionalism in most existing methods for nickel ion detection such as ICP, AAS, and AFS. A kind of preparation method of nano-gold colorimetric sensor, its prepared sensor and application

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
  • Preparation method of nanogold colorimetric sensor and application of nanogold colorimetric sensor in detection of divalent nickel ions
  • Preparation method of nanogold colorimetric sensor and application of nanogold colorimetric sensor in detection of divalent nickel ions
  • Preparation method of nanogold colorimetric sensor and application of nanogold colorimetric sensor in detection of divalent nickel ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Add 100mL of 0.24mM chloroauric acid tetrahydrate to a 250mL Erlenmeyer flask (soak overnight in fresh aqua regia, wash with ultrapure water, dry, and set aside), heat to boiling, add 4mL of 0.034M sodium phytate solution under magnetic stirring, Heat to reflux for 45-60 minutes, the solution turns from light yellow to wine red, stop heating, keep stirring to room temperature, and store at room temperature away from light.

[0073] Measure the ultraviolet-visible absorption spectrum of the nano-gold solution modified by sodium phytate salt prepared in this embodiment, such as figure 1 shown. From figure 1 It can be seen that a characteristic absorption peak appears at 524 nm.

Embodiment 2

[0075] The phytic acid sodium salt modified nano-gold colorimetric sensor prepared above was mixed with an equal volume of 1×10 -5 The nickel chloride aqueous solution of M is mixed, and uses ultraviolet-visible spectrometer (Uv-Vis) to detect the change of corresponding ultraviolet-visible spectrum in 1~25min, and experimental result is as follows figure 2 shown. From figure 2 It can be seen that the UV-visible absorption peak of the nano-gold solution began to decrease significantly at 1 min.

[0076] Observe the ratio of the absorption value corresponding to the characteristic absorption wavelength (A 650 / A 524 ) changes with time, such as image 3 shown. From image 3 It can be seen that the value is basically stable after 15 minutes, so the nano-gold probe modified by sodium phytate can quickly detect Ni 2+ .

Embodiment 3

[0078] The nano-gold colorimetric sensor modified by sodium phytate salt prepared in Example 1 was used for 1×10 -5 M Ni 2+ For detection, take 1.5mL concentration as 2×10 -5 M nickel chloride aqueous solution, and then measure 1.5mL containing other metal ions (FeCl 3 , FeCl 2 ,KCl,CuCl 2 ,MnCl 2 ,CdCl 2 ,CoCl 2 ,NiCl 2 ,Pb(NO 3 ) 2 ,ZnCl 2 ,MgCl 2 ,CaCl 2 ,AlCl 3 ,Cr 2 O7 2- ) concentration is 4×10 -5 M aqueous solution, the above-mentioned nano-gold modified by sodium phytate salt was mixed with the solution containing the above-mentioned metal ions, and 100 μL of 0.2M acetic acid-sodium acetate buffer solution (pH=3.6) was added, and the color change was observed. The experimental results were as follows: Figure 4 shown. It was found that only Ni 2+ The nano-gold solution turns from red to blue.

[0079] Simultaneously, measure the ultraviolet-visible absorption spectrum of the nanogold modified by phytic acid sodium salt and the mixed solution containi...

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
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a nanogold colorimetric sensor and application of the nanogold colorimetric sensor in colorimetric detection of bivalent nickel ions (Ni<2+>), and aims to solve the problems that most of existing nickel ion detection methods such as ICP, AAS, AFS and the like have the defects of strict sample preservation conditions, high analysis method cost, long analysis time, strong operation specialty and the like. According to the invention, a stable and water-soluble sodium phytate modified nanogold colorimetric sensor is obtained by taking a gold salt as a gold nanoparticle source and sodium phytate as a reducing agent and a ligand at the same time to react under the condition that the gold salt solution is boiled; and the sensor disclosed by the invention has a series of advantages of convenience in carrying, high sensitivity, strong selectivity, good stability and the like, can realize rapid detection of Ni<2+>, has the advantages of high detection speed, high sensitivity and the like, and has a wide application prospect and a relatively high market application value.

Description

technical field [0001] The invention relates to the fields of environmental science, laboratory chemistry and analytical chemistry, specifically a preparation method of a nano-gold colorimetric sensor and its application in the detection of divalent nickel ions. The invention provides a fast sensor for divalent nickel ions A sensitive, visual detection and analysis sensor and its application have good results. Background technique [0002] Nickel is an essential trace element for the human body, and plays an important clinical role in the synthesis and metabolism of enzymes required by the body. Nickel in soil mainly comes from rock weathering, atmospheric dust, irrigation water, fertilizer, and rotting corpses. Severe nickel pollution of water bodies and soils will destroy the ecosystem and directly result in the reduction of crops and aquatic products. The human body usually accumulates nickel in the body through oral cavity, breathing, and epidermal absorption. Injury ...

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): G01N21/78G01N21/82G01N21/33G01N21/31B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCG01N21/78G01N21/82G01N21/31G01N21/33B22F9/24B82Y40/00B82Y30/00G01N2021/825B22F1/0545B22F1/102
Inventor 黄德顺赵鹏翔张林杉岳国宗朱婧
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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