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Malachite green selective electrode and manufacturing method thereof

A malachite green, selective technology, applied in the direction of material analysis, instruments, and analysis materials by electromagnetic means, can solve the problems of poor reproducibility and precision, prone to false positive results, unsuitable for on-site detection, etc. Achieve the effect of simple equipment, lower ion diffusion coefficient in the membrane, and low analysis cost

Inactive Publication Date: 2013-07-24
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The primary technical problem to be solved by the present invention is to overcome the deficiencies of several methods for detecting malachite green content in the above-mentioned existing samples, including: poor reproducibility and precision, high detection limit, prone to false positive results, pre-sample The processing is complicated, professional operators are required, the equipment is expensive, the analysis cost is high, the detection time is long, and it is not suitable for on-site detection, etc., to provide a two-dimensional functional material based on restricted medium-molecularly imprinted polymers (RAM-MIPs) Malachite green selective electrode, which has high sensitivity and high selectivity, fast detection speed, high precision and accuracy, simple instruments and low analysis cost

Method used

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  • Malachite green selective electrode and manufacturing method thereof
  • Malachite green selective electrode and manufacturing method thereof
  • Malachite green selective electrode and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step: the preparation of polystyrene seed aqueous solution:

[0040] Dissolve 2.0g dispersion stabilizer polyvinylpyrrolidone (PVP) in the mixed solution that is made up of 60.4mL ethanol and 7.6mL water, put it into the 250mL four-necked bottle that thermometer, stirrer and condenser are housed, stir to form After the homogeneous system, under the protection of nitrogen, stir and pre-disperse at 70°C for 30min, then add 30.0g of monomer styrene and 0.3g of initiator azobisisobutyronitrile, and react at 70°C for 24h under stirring and nitrogen protection. The polymer dispersion was washed repeatedly with ethanol, dried, and diluted with water to a concentration of 0.5 g / mL to obtain an aqueous solution of polystyrene seeds;

[0041] The second step: the preparation of RAM-MIPs, the steps are as follows:

[0042] Mix 0.17mL 0.5g / mL polystyrene seed aqueous solution with 0.48mL DBP, 0.02g sodium dodecylsulfonate and 10mL distilled water ultrasonically, stir at ...

Embodiment 2

[0058] The first step: the preparation of polystyrene seed aqueous solution:

[0059] Dissolve 2.0g of the dispersion stabilizer polyvinylpyrrolidone (PVP) in 68mL of ethanol, put it into a 250mL four-necked bottle equipped with a thermometer, agitator and condenser, stir to form a homogeneous system, and then protect it with nitrogen. Stir and pre-disperse at 70°C for 30min, then add 30.0g of monomer styrene and 0.3g of initiator azobisisobutyronitrile, react at 70°C for 24h under stirring and nitrogen protection, and wash the polymer dispersion repeatedly with ethanol Dry and dilute with water to a concentration of 0.5g / mL to obtain an aqueous solution of polystyrene seeds;

[0060] Others are the same as embodiment 1, such as Figure 2-b .

Embodiment 3

[0062] The first step: the preparation of polystyrene seed aqueous solution:

[0063] Dissolve 4.0g of the dispersion stabilizer polyvinylpyrrolidone (PVP) in a mixed solution composed of 60.4mL of ethanol and 7.6mL of water, put it into a 250mL four-necked bottle equipped with a thermometer, a stirrer and a condenser, and stir until uniform After the phase system, under the protection of nitrogen, stir and pre-disperse at 70°C for 30min, then add 28.0g of monomer styrene and 0.3g of initiator azobisisobutyronitrile, react at 70°C for 24h under stirring and nitrogen protection, and polymerize The dispersion was washed repeatedly with ethanol, dried, and diluted with water to a concentration of 0.5 g / mL to obtain an aqueous solution of polystyrene seeds;

[0064] Others are the same as embodiment 1, such as Figure 2-c .

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Abstract

The invention provides a malachite green selective electrode and a manufacturing method thereof. The electrode is formed by combining a sensitive membrane, internal filling liquid, an internal ratiometric electrode, an electrode pole and an epoxy resin, wherein the sensitive membrane contains an electric active substance and a restricted-access media-molecularly imprinted polymer two-dimension functional material (RAM-MIPs). The RAM-MIPs two-dimension functional material introduced in the invention has the advantages of reducing diffusion coefficient of ions in the membrane and improving electrode selectivity and the like; simultaneously the internal filling liquid is optimized; the transmembrane ion flux can be inhibited effectively; and the detecting limit of the electrode is reduced tothe magnitude of 10 to 9mol / L. By taking the malachite green selective electrode as an indicator electrode and by adopting a potential analysis method, the malachite green can be detected with high sensitivity and high selectivity; and the detecting speed is quicker, the required equipment is simple, the analysis cost is low, and the field detection on malachite green can be realized.

Description

technical field [0001] The invention relates to the technical fields of electroanalytical chemistry, polymer materials, and chemical sensors, in particular to a malachite green selective electrode based on a restricted access medium-molecularly imprinted polymer two-dimensional functional material and a preparation method thereof. Background technique [0002] Malachite Green (Malachite Green, MG) is a green crystal with metallic luster, belonging to triphenylmethane industrial dyes, which can be used as insecticides and fungicides to kill fish ectoparasites and eggs. Mold to control infections such as bacteria, tapeworms, nematodes and flukes. However, MG is a fat-soluble compound, which remains in the fish body and the environment for a long time, has the risk of mutagenesis, teratogenicity and carcinogenicity, and seriously threatens human health. Therefore, many countries and regions such as the United States, the European Union, Canada and my country have banned its use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/333C08F222/14C08F220/06C08F226/06C08F2/44C08J9/26C08F112/08
Inventor 郭智勇盖盼盼张会娜段静王邃魏丹毅
Owner NINGBO UNIV
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