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Organic multi-component carrier lead ion selective electrode and preparation method thereof

A technology of selecting electrodes and multi-components, which is applied in the field of analysis and measurement, and achieves the effects of simple preparation, good linearity and improved performance

Inactive Publication Date: 2012-09-19
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing deficiencies in the production of lead ion selective electrodes by chemical modification methods, and to provide an organic multi-component composite carrier lead ion selective electrode produced by physical methods

Method used

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  • Organic multi-component carrier lead ion selective electrode and preparation method thereof
  • Organic multi-component carrier lead ion selective electrode and preparation method thereof
  • Organic multi-component carrier lead ion selective electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of a single component of tetraphenylporphyrin as a carrier and its membrane (blank control)

[0031] Dissolve 0.006g tetraphenylporphyrin in 5mL THF, ultrasonically disperse for 5min, then add 0.006g NaTPB, 0.2mL DBP, 0.2g PVC powder, and ultrasonically disperse intermittently for 10min. The above solution was poured into a glass ring with a diameter of 80 mm stuck on a glass sheet, and dried naturally at room temperature for 24 hours to obtain a flexible and elastic selective membrane.

Embodiment 2

[0032] Example 2: Preparation of Tetraphenylporphyrin and Dimethyl Sulfide Blend as Carrier and Film

[0033] Dissolve 0.003g tetraphenylporphyrin, 0.003g dimethyl sulfide in 5mL THF, ultrasonically disperse for 5min, then add 0.006g NaTPB, 0.2mLDBP, 0.2gPVC powder, intermittently ultrasonically disperse for 10min. The above solution was poured into a glass ring with a diameter of 80 mm stuck on a glass sheet, and dried naturally at room temperature for 24 hours to obtain a flexible and elastic selective membrane.

Embodiment 3

[0034] Example 3: Preparation of Tetraphenylporphyrin and Triphenylphosphine Blend as a Carrier and Its Membrane

[0035] Dissolve 0.003g tetraphenylporphyrin and 0.003g triphenylphosphine in 5mL THF, ultrasonically disperse for 5min, then add 0.006g NaTPB, 0.2mLDBP, 0.2gPVC powder in sequence, and ultrasonically disperse intermittently for 10min. The above solution was poured into a glass ring with a diameter of 80 mm stuck on a glass sheet, and dried naturally at room temperature for 24 hours to obtain a flexible and elastic selective membrane.

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Abstract

The invention discloses an organic multi-component carrier lead ion selective electrode and a preparation method thereof. The organic multi-component carrier lead ion selective electrode comprises a selective film, a polrvinyl chloride pipe, an Ag / AgCl internal reference electrode, internal filled liquid and an electrode lead. The preparation method is characterized by comprising the following steps of: sufficiently mixing macrocyclic compounds such as calixarene, tetraphenylporphyrin and 18-crown ether-6 and organic matters containing soft active atoms (O, S, P), such as triphenylphosphine and dimethyl sulfide, to prepare a physical blending carrier; and dissolving the blending carrier, polrvinyl chloride powder, dibutyl phthalate and sodium tetraphenylborate into tetrahydrofuran, and carrying out ultrasonic dispersion to obtain a lead ion selective film. The purpose of carrier modification is achieved through physical mixing, so that the property of the lead ion selective electrode is extremely high, and the carrier is avoided being subjected to chemical modification with a complicated chemical synthesis process and a large quantity of organic reagents. The organic multi-component carrier lead ion selective electrode has the advantages of simple manufacturing, Nernst response, good selectivity and high stability and can be used for quickly and accurately detecting lead ions in a solution.

Description

technical field [0001] The invention belongs to the field of analysis and measurement, in particular to a preparation method of a selective electrode for detecting lead ions. Background technique [0002] Lead exceeding the standard can cause harm to the environment, animals, human body, etc., so quantitative detection of lead ion concentration is of great significance. Common lead ion detection methods include atomic absorption method, spectrophotometry, inductive coupling method, voltammetry and so on. However, these methods are cumbersome to operate, expensive instruments, high cost, and cannot achieve rapid and on-line detection of lead ions. The other is the lead ion selective electrode method, which is cheap, easy to carry, easy to operate, and is not affected by the color and turbidity of the sample. Therefore, it is of great significance to develop lead ion selective electrodes. [0003] Most of the lead ion selective electrodes that have been researched at home a...

Claims

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Application Information

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IPC IPC(8): G01N27/333
Inventor 叶健陈义旺杨业丰邓士成高升平
Owner BENGBU COLLEGE
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