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Polymer-based detection agent for fast detection of heavy metal lead and its preparation method and use

A technology for detecting reagents and polymers, applied in the field of analysis, can solve the problem that the heavy metal lead analysis method is not suitable for rapid detection or use, etc., and achieves the effects of good use prospects, simple operation and low cost.

Active Publication Date: 2012-11-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing commonly used analysis methods for heavy metal lead in water are not suitable for rapid detection or the use is limited to a certain extent, and to provide a preparation method of a polymer-based detection reagent for rapid detection of heavy metal lead with a wide range of application and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of polymer-based detection reagents, including:

[0022] (1) Photografting on the polymer film surface: take benzophenone as photoinitiator, use the aqueous solution of N-vinylpyrrolidone, N, N'-methylenebisacrylamide as water phase, 3-(methyl Acryloyloxy)propyltrimethoxysilane and n-decane are the oil phase, and Span 20 and Tween 60 are the inverse microemulsions composed of surfactants, wherein the mass concentration of benzophenone in the emulsion is 0.5 %, the concentration of N-vinylpyrrolidone in the water phase is 20%, the molar ratio of N-vinylpyrrolidone to N, N'-methylenebisacrylamide is 30:1, and the oil phase contains 3-(methacryloyl The mol ratio of oxygen) propyltrimethoxysilane and N-vinylpyrrolidone is 1: 1, and the concentration of surfactant in the oil phase is 20%, and the mass ratio of Span 20 and Tween 60 is 2: 1, The ratio of oil to water is 6: 4, and a uniform microemulsion is formed through mechanical stirring, and the ethylene terep...

Embodiment 2

[0030] According to the preparation method of Example 1, the concentration of the monomer in the water phase in the microemulsion is 30%, and the other conditions remain unchanged, and a polymer-based detection reagent for rapid detection of heavy metal lead is prepared.

Embodiment 3

[0032] According to the preparation method of Example 1, the molar ratio of 3-(methacryloyloxy)propyltrimethoxysilane to N-vinylpyrrolidone in the oil phase of the microemulsion is 1:2, and the other conditions are unchanged, and the fast A polymer-based detection reagent for the detection of heavy metal lead.

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Abstract

The invention discloses a polymer-based detection agent for fast detection of a heavy metal lead and its preparation method and use, and belongs to the technical field of analysis. The polymer-based detection agent is characterized in that a layer of N-vinylpyrrolidone and hydroxylated 3-(methylacryloxy)propyltrimethoxysilane nano-particles are coated on the surface of a PET polymer as a base material film by surface photografting; a mixture of dodecyltrimethylammonium bromide, polyving akohol and citric acid is loaded on the nano-particles; and dithizone and glutaraldehyde color-developing agents are loaded on the mixture. The preparation method comprises the following step of coating a layer of unhydroxylated nano-particles on the surface of a base material film, and carrying out hydrolysis, pre-treatment and color-developing agent loading. In use, a standard solution and the polymer-based detection agent undergo a reaction so that standard color gradation is obtained; a solution needing to be detected and the polymer-based detection agent undergo a reaction; and a color of the solution needing to be detected is compared with the standard color gradation. The polymer-based detection agent has the advantages of high detection precision, good repeatability, simple operation and low cost.

Description

technical field [0001] The invention relates to a polymer-based detection reagent for detecting lead, a preparation method and an application, and belongs to the field of analysis technology. Background technique [0002] Lead is a heavy metal that widely exists in the living environment. From mining to finished product use, there are more than 100 professions related to it. The pollution of lead to the environment is mainly caused by industrial and mining enterprises that smelt, manufacture and use lead products, especially from the lead-containing wastewater, waste gas and waste residue discharged from the non-ferrous metal smelting process. In addition, tetraethyl lead in automobile exhaust It has also become the main source of lead pollution in the atmosphere. In addition, lead used in paint coatings in the construction industry, food processing industry and beauty and skin care products also poses a threat to human survival and health. [0003] Lead is a highly toxic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杨万泰吴万玲赵京波马育红
Owner BEIJING UNIV OF CHEM TECH
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