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Electrochemical detection method for dihydrogen phosphate ions in water system

A dihydrogen phosphate and detection method technology, applied in the direction of material electrochemical variables, etc., to achieve simple detection process, good detection effect, and good curve correlation

Inactive Publication Date: 2009-11-18
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

It not only solves the problem of developing anion receptors in aqueous media; at the same time, it makes our recognition system more sensitive and specific than some other recognition systems

Method used

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  • Electrochemical detection method for dihydrogen phosphate ions in water system
  • Electrochemical detection method for dihydrogen phosphate ions in water system
  • Electrochemical detection method for dihydrogen phosphate ions in water system

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Embodiment Construction

[0032] In order to illustrate content of the present invention more clearly, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0033] The water used in the experiment process is double distilled water, the reagents used in the experiment are all analytical pure, and the oxidation of the gold electrode surface uses 0.5M sulfuric acid solution.

[0034] (1), the instrument and reagent used in this embodiment

[0035] Multi-channel electrochemical workstation (VMP2, Princeton Instruments, USA) was used for AC impedance experiments, Ag / AgCl reference electrode (CHI111, CH Instruments, USA), quartz tube heating automatic double pure water distiller (1810B, Asia Pacific, Shanghai) Technical Glass Company) for distilling double-distilled water. Electronic balance (Beijing Sartorius Instrument Co., Ltd.), used for weighing medicines. ML-902 magnetic stirrer (Shanghai Pujiang Analytical Instrument Factory) alumin...

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Abstract

The invention provides an electrochemical detection method for dihydrogen phosphate ions in a water system, which comprises the steps: inserting a gold electrode the surface of which is self-assembled with a porphyrin monolayer, a reference electrode and a counter electrode into an electrochemical detection cell of potassium hexafluorophosphate electrolyte solution containing red potassium prussiate / potassium ferrocyanide probe molecules, performing scanning by an electrochemical workstation, and obtaining a charge transfer resistance value (Rct) of the self-assembled porphyrin monolayer; and then jointly inserting the gold electrode modified by porphyrin, the reference electrode and the counter electrode into the electrochemical detection cell of the electrolyte solution which contains an object to be detected, namely the dihydrogen phosphate ions, performing scanning by the electrochemical workstation, and obtaining a charge transfer resistance value (Rct) of the self-assembled porphyrin monolayer, wherein the charge transfer resistance values (Rct) and the concentrations (C) of the dihydrogen phosphate ions have corresponding relation. The method detects the dihydrogen phosphate ions on the surface of the gold electrode modified by thiol-porphyrin, is convenient and quick, and realizes the selective detection of the dihydrogen phosphate ions in the water system.

Description

technical field [0001] The invention relates to a simple, sensitive and rapid electrochemical method for detecting dihydrogen phosphate ions in a water system. Background technique [0002] Anions are ubiquitous in biological systems and play important roles in a wide range of biochemical processes, and their effects on environmental pollution are now also recognized. The corresponding artificial anion receptors have attracted great interest due to their potential value in medicine, catalysis and environmental science, especially in the past 20 years. Significant efforts have been devoted to the development of abiotic receptors for anionic species, leading to the design of various sensors for anions. In this way, great possibility and convenience are provided for the determination of anions in biological systems and environments, and they have great practical value in the fields of catalysis, medicine, biology, environmental science, nutrition and the like. [0003] In aci...

Claims

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Application Information

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IPC IPC(8): G01N27/27G01N27/42
Inventor 卢小泉智福鹏尚慧王晓燕宋正思薛中华杨建东徐学锋范静媛
Owner NORTHWEST NORMAL UNIVERSITY
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