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A potentiometric sensor of phosphate ion and its application

A phosphate ion and potential-type technology, which is applied in the field of analysis and testing, can solve problems such as the difficulty in detecting the potential of phosphate ions, and achieve the effects of easy miniaturization, low cost, and simple production

Active Publication Date: 2019-02-19
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potentiometric detection of phosphate ions in aqueous phases is difficult due to the lack of effective phosphate ionophores

Method used

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  • A potentiometric sensor of phosphate ion and its application
  • A potentiometric sensor of phosphate ion and its application
  • A potentiometric sensor of phosphate ion and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take Cu 2+ -BPMP is an example for the detection of phosphate ion as a molecular recognition body. The operation steps are as follows:

[0025] (1) Preparation of polymer membrane electrodes

[0026] Weigh 196mg of polyvinyl chloride, 196mg of o-nitrophenyloctyl ether, and 4.0mg of tridodecylmonomethylammonium chloride, dissolve them in 3.0mL of tetrahydrofuran, stir them evenly, and pour them into a glass plate with an inner diameter of 3.5cm in the glass ring. After the tetrahydrofuran was volatilized, the membrane was cut into small discs with an inner diameter of 3 mm using a puncher and pasted on the tip of a pipette with a PVC tube at the bottom. Use HEPES solution (containing 10 mM NaCl) with pH = 7.0 as the inner filling solution and activation solution to activate the electrode, ready for use.

[0027] (2) Assembly of molecular recognition body and indicator molecule

[0028] Use 20mM HEPES buffer solution to prepare 200μM copper perchlorate solution and 1...

Embodiment 2

[0036] With Zn 2+ -BPMP is an example for the detection of phosphate ion as a molecular recognition body. The operation steps are as follows:

[0037] (1) Preparation of polymer membrane electrodes

[0038] Weigh 196mg of polyvinyl chloride, 196mg of o-nitrophenyloctyl ether, and 4.0mg of tridodecylmonomethylammonium chloride, dissolve them in 3.0mL of tetrahydrofuran, stir them evenly, and pour them into a glass plate with an inner diameter of 3.5cm in the glass ring. After the tetrahydrofuran was volatilized, the membrane was cut into small discs with an inner diameter of 3 mm using a puncher and pasted on the tip of a pipette with a PVC tube at the bottom. Use HEPES solution (containing 10 mM NaCl) with pH = 7.0 as the inner filling solution and activation solution to activate the electrode, ready for use.

[0039] (2) Assembly of molecular recognition body and indicator molecule

[0040] Use 20mM HEPES buffer solution to prepare 200μM zinc perchlorate solution and 100...

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Abstract

The invention belongs to the technical field of analytical tests, and particularly relates to a potential sensor for phosphate anions and application of the potential sensor.According to the potential sensor, the complex (Cu2+-BPMP and Zn2+-BPMP) of Cu2+ or Zn2+ and 2,6-bis{[bis(2-pyridyl methyl)amino]methyl}-4-methylphenol is used as a molecular recognition body, catechol, o-mercaptophenol and derivatives of catechol and o-mercaptophenol are used as indication molecules, and a polymer film electrode doped with anion exchanger is used as an indication electrode.The sensor is high in sensitivity, good in selectivity and free of turbidity and chromaticity interference and has quite good actual application prospects.

Description

technical field [0001] The invention belongs to the technical field of analysis and testing, and in particular relates to a potentiometric sensor of phosphate ions and an application thereof. Background technique [0002] Phosphate ion has important physiological and environmental significance. Abnormal concentration of phosphate ions in body fluids can be used as a sign of disease and metabolic dysfunction, and excessive phosphate ions in environmental waters can cause eutrophication. The traditional method for detecting phosphate is ammonium molybdate spectrophotometry, which has high accuracy but is easily interfered by turbidity and chromaticity. In addition, most of the currently developed phosphate detection methods need to rely on large-scale laboratory instruments. These problems lead to the fact that the existing methods cannot be widely used in the field rapid detection of environmental water bodies. It is still a challenge to develop a simple, selective and non...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00G01N27/26G01N27/333
CPCG01N27/00G01N27/26G01N27/3335
Inventor 秦伟李龙
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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