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Metal ion indicating film, and preparation method and use thereof

A metal ion and indicator technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of inconvenient operation, little significance, and high detection limit of chemical methods. Achieve low cost, short response time and good stability

Active Publication Date: 2014-08-06
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inconvenient operation, low sensitivity and high detection limit of the chemical method, it is usually only used in the laboratory and has little significance in actual production
Although the instrument detection method has a low detection limit and can detect trace amounts of metal ions in the solution, the cost is relatively high

Method used

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  • Metal ion indicating film, and preparation method and use thereof
  • Metal ion indicating film, and preparation method and use thereof
  • Metal ion indicating film, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example provides a method for preparing a metal ion indicating membrane, which includes the following steps:

[0033] (1) 0.5g, acrylonitrile 0.5g, benzoin ethyl ether 0.001g, divinylbenzene 0.008g, mix the above substances, ultrasonic evenly, apply on the mold, UV irradiation (wavelength 240nm-400nm) for 40min to form a film (thickness 0.5mm, colorless and transparent).

[0034] (2) Take a 5.0mg polyionic liquid membrane and soak it in 0.1mol / L Rhodamine B aqueous solution, soak it for 15min at room temperature, take it out and wash it repeatedly with ethanol to get the metal ion indicating membrane, and the color of the membrane at this time is red.

[0035] Take 5.0 mg of the metal ion indicating membrane prepared above and place it on Cu 2+ In an aqueous copper chloride solution with a concentration of 0.001mol / L, the color of the film turns pink. Put 5.0mg of metal ion indicating membrane in 0.1mol / L Fe 3+ 、Na + 、K + , Ca 2+ , Mn 2+ , Zn 2+ 、Al 3+ ...

Embodiment 2

[0037] This example provides a method for preparing a metal ion indicating membrane, which includes the following steps:

[0038] (1) 0.5g, acrylonitrile 0.5g, benzoin ethyl ether 0.001g, divinylbenzene 0.008g, mix the above substances, ultrasonic evenly, apply on the mold, UV light (wavelength 240nm-400nm) 40min polymerization film (thickness 2mm, no color transparent), the infrared absorption curve of the film can be found infigure 1 Line B.

[0039] (2) Soak a 5.0mg polyionic liquid membrane in a 10mol / L rhodamine B aqueous solution, soak it for 5 minutes at room temperature, take it out and wash it repeatedly with ethanol to obtain a metal ion indicating membrane, and the color of the membrane is red at this time , its infrared absorption curve see figure 1 Line C, compared with the polyionic liquid membrane, which is at 1644cm -1 ,1371cm -1 ,1095cm -1 and970cm -1 A new infrared absorption peak appeared at , indicating the binding of rhodamine B molecules on the pol...

Embodiment 3

[0043] This example provides a method for preparing a metal ion indicating membrane, which includes the following steps:

[0044] (1) 0.5g, acrylonitrile 0.5g, benzoin ethyl ether 0.001g, divinylbenzene 0.008g, mix the above substances, ultrasonic evenly, apply on the mold, UV irradiation (wavelength 240nm-400nm) for 40min to form a film (thickness 0.5mm, colorless and transparent).

[0045] (2) Take a polyionic liquid membrane with a mass of 5.0 mg and soak it in an aqueous solution of 1mol / L rhodamine B, soak it for 10 minutes at room temperature, take it out and wash it repeatedly with ethanol to obtain a metal ion indicating membrane, and the color of the membrane is red at this time .

[0046] Take 5.0 mg of the metal ion indicating membrane prepared above and place it on the Ag + In the silver nitrate aqueous solution with a concentration of 0.0001mol / L, the color of the film turns brown.

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Abstract

The invention relates to a metal ion indicating film, and a preparation method and use thereof. The metal ion indicating film is obtained by soaking a special polyionic liquid film in a Rhodamine B aqueous solution. Different chromogenic reactions occur when the indicating film is placed in a Cu<2+> or Ag<+> ion containing solution, and the color of the film changes differently, so that Cu<2+> ions and Ag<+> ions in the solution can be very conveniently tested qualitatively. Meanwhile, the metal ion indicating film provided by the invention is the polyionic liquid film, is simple and environment-friendly in preparation process, and is good in mechanical property and stability. In general, the metal ion indicating film provided by the invention can be used to qualitatively analyze Cu<2+> ions and Ag<+> ions quickly and is low in cost.

Description

technical field [0001] The invention relates to a metal ion indicating membrane, its preparation method and application. Background technique [0002] The detection of metal ions is often involved in the chemical industry, materials and electronics industries. There are many existing detection methods for metal ions. Different metal ions have different detection methods. These detection methods can be roughly divided into chemical detection methods and instrumental detection methods. For example, for copper ions, it can be identified by chemical methods such as flame reaction (green), black insoluble black precipitate produced by hydrogen sulfide, and dark blue copper ammonium ions formed with excess ammonia water. For silver ions, it can be identified by its chemical method of forming yellow and yellow precipitates with sodium bromide or sodium iodide. However, due to the inconvenient operation, low sensitivity and high detection limit of the chemical method, it is usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/00C08L39/04C08L33/20C08L33/14C08F226/06C08F220/44C08F212/36C08F220/34C08F212/14G01N21/78
Inventor 严锋袁超邓之俊郭江娜
Owner SUZHOU UNIV
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