Electrochemical sensor used for bisphenol A detection

An electrochemical and sensor technology, applied in the field of electrochemical sensors for bisphenol A detection, to achieve the effects of good reproducibility, easy operation and high sensitivity

Inactive Publication Date: 2012-02-01
XIANGTAN UNIV
View PDF6 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiency of a single carbon nanotube or β-cyclodextrin on the modified electrode, the ...

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
  • Electrochemical sensor used for bisphenol A detection
  • Electrochemical sensor used for bisphenol A detection
  • Electrochemical sensor used for bisphenol A detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The electrochemical sensor of the present invention includes glassy carbon electrodes, and a sensitive film is coated on the glassy carbon substrate.

[0055] The preparation method of electrochemical sensor of the present invention is as follows:

[0056] (1) Preparation of mono-(6-hexamethylenediamine)-β-cyclodextrin: add 10 g of hexamethylenediamine and 30 mL of refined DMF to 5 g of mono-(6-p-toluenesulfonyl)-β-cyclodextrin React at 75°C for 4h, settle with acetone, dissolve the precipitate with 10mL water-methanol (volume ratio 3:1), and then settle-dissolve, repeat 5 times and then dry under vacuum at 50°C for 72h to obtain mono-(6-hexyl diamino)-β-cyclodextrin.

[0057] (2) Place 200 mg of dry single-walled carbon nanotubes in a 100 mL round bottom flask, slowly add 20 mL of mixed acid (98% concentrated sulfuric acid and 65% concentrated nitric acid, volume ratio is 3:1) solution, and ultrasonically disperse for 30 min Transfer to a 20°C oil bath for constant t...

Embodiment 2

[0065] Dissolve 1 mg of the prepared carbon nanotube / β-cyclodextrin complex in 2 mL of twice-distilled water, and then disperse it fully by ultrasonic dispersion to obtain a carbon nanotube / β-cyclodextrin complex dispersion , the concentration of the aqueous dispersion is 0.0005mg / L;

[0066] Take 20 μL carbon nanotube / β-cyclodextrin complex dispersion liquid and drop it on the surface of glassy carbon electrode, and the electrochemical sensor covered with sensitive film is obtained after solvent volatilization.

[0067] With the electrochemical sensor gained in the present embodiment to 10 -8 mol / L bisphenol A is detected, and its oxidation peak current is close to that of Example 1.

Embodiment 3

[0069] Dissolve 10 mg of the prepared carbon nanotube / β-cyclodextrin complex in 2 mL of twice-distilled water, and then disperse it fully by ultrasonic dispersion to obtain a carbon nanotube / β-cyclodextrin complex dispersion , the concentration of the aqueous dispersion is 0.005mg / L;

[0070] Take 2 μL carbon nanotube / β-cyclodextrin complex dispersion liquid and drop it on the surface of glassy carbon electrode, and the electrochemical sensor covered with sensitive film is obtained after the solvent evaporates.

[0071] Use this electrochemical sensor for 10 -8 mol / L bisphenol A is detected, and its oxidation peak current is close to that of Example 1.

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
Concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses an electrochemical sensor used for bisphenol A detection, which belongs to the technical field of electrochemical analysis detection. The invention also discloses a preparation method for the electrochemical sensor and an application of detecting bisphenol A in a single pattern. The preparation method for the electrochemical sensor comprises the following steps: grafting beta-cyclodextrin to the surface of a carbon nano tube, wherein the beta-cyclodextrin can be easily dispersed into secondary distilled water; dropwise adding a dispersion to a glassy carbon electrode; and evaporating to dry a solvent to obtain the electrochemical sensor constructed by a sensitive film and the glassy carbon electrode. The electrochemical sensor has high sensitivity on detecting the bisphenol A and high stability, and the detection lower limit reaches 1*10-9mol/L.

Description

technical field [0001] The invention relates to an electrochemical sensor for detecting bisphenol A, a preparation method and application thereof. Background technique [0002] Bisphenol A (Bisphenol A, BPA) is a phenolic environmental estrogen and is the main raw material for the production of polycarbonate (PC) and epoxy resin (EP). The exposure dose of bisphenol A in the population will have certain effects on the body, mainly including the reproductive system, embryonic development, central nervous system, tumor occurrence, etc. Even trace concentrations of bisphenol A have negative effects on human reproduction and the viability of offspring . A British study (The Journal of the American Medical Association, 2008, 300: 1303) showed that bisphenol A, which is widely present in plastic products including baby bottles, is associated with increased incidence of diabetes and heart disease; the US Environmental Protection Agency Bisphenol A has long been included in the bla...

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): G01N27/26G01N27/30C08B37/16
Inventor 黎华明高勇曹宇宋桂玲罗旭俊杨端光陈红飙
Owner XIANGTAN UNIV
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