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Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin

A chelating resin and electrochemical technology, which is applied in the synthesis field of melamine-formaldehyde-ethylenediaminetetraoxaloacetate chelating resin, can solve the problem of no Ni(II) sensor research report, etc., and achieve excellent electrical conductivity, process Simple and reliable, stable performance

Inactive Publication Date: 2014-06-25
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the resin is non-conductive, it cannot be directly used as an electrode modification. So far, there has been no research report on the use of MFT for the preparation of Ni(II) sensors.

Method used

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  • Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin
  • Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin
  • Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 0.8g of sodium lauryl sulfate solid, add it into 100mL of water, add 34.8g of ethylenediaminetetraoxaloacetic acid, 37wt% (mass percentage concentration, the same below) formaldehyde 50mL, 12.6g of melamine, 0.06g of polyvinyl alcohol, 0.02g of phenol and 0.4g of sodium sulfate were adjusted to pH 5.0 with 0.1mol / L HCl solution; deoxygenated with nitrogen for 10 minutes, and ultrasonicated for 30 minutes at room temperature (power 12.5Wcm -1 ); add 0.025g of o-toluic acid terminator, and continue ultrasonication for 5min to end the reaction; place the obtained polymeric emulsion at 4°C for 2 hours to break the emulsion, and after solid-liquid separation, vacuum dry at 60°C for 3 hours to obtain Crude chelating resin dry glue: the crude chelating resin dry glue is washed with water, acetone and ethanol in sequence, and then dried to obtain melamine-formaldehyde-ethylenediaminetetraoxaloacetic acid chelating resin.

[0042] Get a certain amount of MFT chelating resi...

Embodiment 2

[0045] Weigh 1g of sodium lauryl sulfate solid, add 100mL of water, add 52.2g of ethylenediaminetetraoxaloacetic acid, 70mL of 37wt% formaldehyde, 12.6g of melamine, 0.08g of polyvinyl alcohol, 0.09g of acetone and 1g of sodium chloride, adjusted to pH 4.2 with 0.1mol / L HCl solution; deoxygenated by nitrogen for 10 minutes, ultrasonic at room temperature for 20 minutes (power 5.5Wcm -1 ); add 0.06g triethanolamine terminator, continue ultrasonication for 5min to end the reaction; place the obtained polymeric emulsion at 4°C for 2 hours, then break the emulsion, and after solid-liquid separation, vacuum dry at 50°C for 5 hours to obtain crude chelate Resin dry glue: the crude chelating resin dry glue is washed with water, acetone and ethanol in sequence, and then dried to obtain melamine-formaldehyde-ethylenediaminetetraoxaloacetic acid chelating resin.

[0046]Get a certain amount of MFT chelating resin prepared in step 1, adjust to suspension with formic acid solution, centri...

Embodiment 3

[0049] Weigh 0.5g of sodium lauryl sulfate solid, add it to 100mL of water, add 43.5g of ethylenediamine tetraoxaloacetic acid, 30mL of 37wt% formaldehyde, 6.3g of melamine, and 0.08g of polyvinyl alcohol into the sodium lauryl sulfate solution , 0.1g polyethylene glycol and 0.8g sodium chloride, adjusted to pH 4.0 with 0.1mol / L HCl solution; deoxygenated by nitrogen gas for 15 minutes, ultrasonic at room temperature for 20 minutes (power 8.0Wcm -1 ); add 0.05g triethanolamine terminator, continue ultrasonication for 5min to end the reaction; place the obtained polymeric emulsion at 10°C for 2 hours, then break the emulsion, and after solid-liquid separation, vacuum dry at 70°C for 3 hours to obtain crude chelate Resin dry glue: the crude chelating resin dry glue is washed with water, acetone and ethanol in sequence, and then dried to obtain melamine-formaldehyde-ethylenediaminetetraoxaloacetic acid chelating resin.

[0050] Get the MFT chelating resin that a certain amount of...

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Abstract

A nickel ion electrochemical sensor comprises a reaction tank (6), an electrode support (5), a reference electrode (3), a work electrode (2) and an auxiliary electrode (1), and is characterized in that a modified electrode with a tripolycyanamide-formaldehyde- ethylenediamine-tetra-oxaloacetic acid chelating resin / carboxylation carbon nano-tube composite modified layer (4) on the end surface of a wax-filled graphite electrode is used as the work electrode (2); and the mass ratio of the chelating resin to a carboxylation carbon nano-tube is 10:1-100:1. The chelating resin is formed by using tripolycyanamide, formaldehyde and ethylene dinitrilotetra oxaloacetic acid as monomers, and performing ultrasonic polymerization at normal temperature under the condition that aqueous solution has a dispersing agent, a colloid protecting agent, porogen and an anti-blocking agent. The sensor is stable in performance, high in anti-interference ability, long in service life and low in detection limit, and can reach 1X10<-13>mol*L<-1>.

Description

1. Technical field [0001] The present invention relates to a kind of preparation method of electrochemical sensor and electrode material thereof, specifically the nickel that adopts melamine-formaldehyde-ethylenediaminetetraoxaloacetic acid chelating resin and carboxylated carbon nanotube compound modified electrode as working electrode An ion electrochemical sensor, and a synthesis method of melamine-formaldehyde-ethylenediaminetetraoxaloacetate chelate resin. 2. Background technology [0002] Heavy metal nickel mainly exists in the water environment in the form of ions and complexes. Once ingested into the human body, it can accumulate and cause a series of diseases such as kidney and cardiovascular system poisoning, tumor canceration, etc., and endanger human health (E.Denkhaus, K. Salnikow, Crit Rev Oncol Hematol., 2002, 42, 35; R. Segura, M. Pradena, D. Pinto, F. Godoy, E. Nagles, V. Arancibia, Talanta, 2011, 85, 2316). Therefore, it is of great significance to accurat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/28G01N27/30C08G12/40C08G12/32C08G69/26
Inventor 晋冠平何翡翡朱晓辉
Owner HEFEI UNIV OF TECH