Ion imprinted material for rapid color development and detection of copper ions and preparation method and application thereof

An ion imprinting and copper ion technology, which is applied in the direction of chemical reaction of materials for analysis, material analysis by observing the impact on chemical indicators, and improvement of process efficiency, which can solve problems such as low sensitivity and coexisting ion interference. , to achieve the effect of strong anti-interference ability, low detection conditions and low price

Active Publication Date: 2021-04-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has fast response and simple operation, but the sensitivity is relatively low, and the coexisting ions will cause some interference

Method used

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  • Ion imprinted material for rapid color development and detection of copper ions and preparation method and application thereof
  • Ion imprinted material for rapid color development and detection of copper ions and preparation method and application thereof
  • Ion imprinted material for rapid color development and detection of copper ions and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Diphenylsemicarbazide and CuCl 2 Dissolve in ethanol solution at a molar ratio of 2:1, sonicate until completely dissolved, stir for pre-polymerization at room temperature for 3 hours, and prepare solution 1;

[0028] (2) Add 20mmol ethylene glycol dimethacrylate (EGDMA) and 0.05g azobisisobutyronitrile (AIBN) to the toluene solution, fully dissolve and mix it as solution 2;

[0029] (3) Mix the solution 1 obtained in step (1) with the solution 2 obtained in step (2), then add 35 mL of hydroxyethyl cellulose (HEC) solution, pass through nitrogen for 15 minutes to remove oxygen, and shake and polymerize at 70 ° C for 6 hours, to obtain polymerized products;

[0030] (4) washing the polymer product obtained in step (3) with methanol until clarification, to wash away unreacted functional monomers and cross-linking agents; then eluting with HCl solution to remove template copper ions until it cannot be detected by flame atomic absorption spectrometer then washed with ...

Embodiment 2

[0032] The copper ion rapid color development detection ion imprint material (material hereinafter referred to as material) obtained in embodiment 1 is carried out each performance index measurement:

[0033] Add 10mg of material to 50mL for a concentration of 100mg L -1 In different pH values ​​of copper ion solutions, shake at 25°C for 120 minutes to measure the adsorption effect of materials on copper ions at different pH values. The results show that when the pH value is 5, the adsorption capacity of the material to copper ions can reach 23.54 mg g -1 , and the color effect of the material tends to be stable at this pH value. Therefore, subsequent adsorption experiments will be carried out at this pH value.

[0034] Add 10mg of material to 50mL, pH 5, concentration 100mg L -1 In the copper ion solution, the adsorption performance was measured at different adsorption times (5-300min), and the temperature was controlled at 25°C. The results showed that the adsorption rea...

Embodiment 3

[0043] The rapid chromogenic detection of copper ion imprinted material was used for the on-site detection of copper ion in environmental water samples. Collect river water, lake water, pond water and well water samples. The pH value of each water sample is within 6-7, and there is no need to adjust the pH. Take 10mg of the material and add it to 5mL of water sample, shake it for 30s and let it stand until the material settles, the total time required is about 1 minute. The material is compared with the standard color scale of copper ions to obtain the corresponding concentration, and the result is compared with the measurement results of the atomic absorption spectrometer, as shown in Table 1 below. It can be seen that the color detection results are basically consistent with the instrument measurement results, and the accuracy is high. And in multiple parallel experiments, it can maintain stable color detection results with good reproducibility.

[0044] Table 1 The detect...

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PUM

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Abstract

The invention belongs to the technical field of rapid detection of heavy metals, and discloses an ion imprinted material for rapid color development and detection of copper ions and a preparation method and application thereof. The preparation method comprises the following steps: dissolving diphenyl semicarbazide and CuCl2 in a proper amount of an ethanol solution according to a molar ratio of 2:1, carrying out ultrasonic treatment until the diphenyl semicarbazide and CuCl2 are completely dissolved, and stirring and pre-polymerizing at room temperature for 3 hours to obtain a solution 1; adding azodiisobutyronitrile and ethylene glycol dimethacrylate into the toluene solution, and mixing and dissolving to obtain a solution 2; mixing the two solutions, and adding a hydroxyethyl cellulose solution; oscillating for 6 hours at the temperature of 70 DEG C under the oxygen-free condition of introducing N2; and washing, eluting and drying to obtain the target material. According to the invention, an ion imprinting technology and a chemical developing technology are organically combined to obtain the developing imprinting material capable of rapidly and specifically detecting trace copper ions. The preparation method is simple, good in selectivity and reusable; and the method is high in color development speed, can complete detection within one minute, is reliable in result, and can be used for quickly detecting copper ions in an actual water sample.

Description

technical field [0001] The invention belongs to the technical field of rapid detection of heavy metals, in particular to a copper ion (Cu 2+ ) rapid chromogenic detection ion imprinted material and its preparation method and application. Background technique [0002] Copper is an indispensable metal element in industrial production because of its good physical and chemical properties. With the widespread use of copper and its alloy materials in various industries, a large amount of copper-containing waste and metal dust are discharged into the environment. Copper will be enriched in a large amount in the human body through direct respiratory contact and the cumulative effect of the food chain. Excessive intake will cause protein denaturation, vomiting, abdominal pain, etc., and in severe cases, it will also cause kidney failure, uremia, and cause neonatal deformity. In view of the above hazards, my country's "Drinking Water Source Water Quality Standards" stipulates that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78Y02P10/20
Inventor 马晓国彭雨琦王颖
Owner GUANGDONG UNIV OF TECH
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