Polyporphyrin/nanogold modified glassy carbon electrode as well as preparation method and application thereof

Abstract

The invention discloses a polyporphyrin / nanogold modified glassy carbon electrode as well as a preparation method and application thereof. The polyporphyrin / nanogold modified glassy carbon electrode comprises a glassy carbon electrode, wherein nanogold particles are deposited on the surface of the glassy carbon electrode, and the surface of the glassy carbon electrode is coated with a polymerized tetraphenylporphyrin film layer. The preparation method comprises the following steps: 1, synthesizing and preparing a tetraphenylporphyrin solution; 2, preparing a chloroauric acid solution; 3, preparing a nanogold modified glassy carbon electrode; 4, preparing the polyporphyrin / nanogold modified glassy carbon electrode; 5, airing the electrode at the room temperature. The electrode can be applied to detection of a trace amount of lead ions. The electrode has the advantages that the electrode is high in detection sensitivity, good in repeatability, wide in linear range and low in detection limit in a process of detecting lead ions.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis, in particular to a polyporphyrin / nano-gold modified glassy carbon electrode, a preparation method and its application to the detection of lead ions. Background technique [0002] Lead is a widely used but toxic metal. Although the lead content in the earth's crust itself is relatively low, and most of it exists stably in the form of lead sulfide; however, due to the large amount of lead used in human activities, such as mining and metallurgy, leaded petroleum, leaded batteries and pigments, jewelry manufacturing, etc., the world's There are very serious lead pollution and lead-induced health problems in many areas. Once lead is released into the environment it persists. After lead is absorbed into the human body, it will cause multiple damages to the nervous system, blood circulation system, digestive system and urinary system. In recent years, there have been frequent reports...

AI Technical Summary

Problems solved by technology

Low detection limit of mass spectrometry, up to ng.g -1 level; but the mass spectrometer detection instrument is more expensive, and the processing of the original sample is very troublesome and prone to human error

Spectroscopic detection is prone to spectral interference problems of other impurity metals

Magnetic resonance imaging can be detected in opaque media, but like mass spectrometry, the detection equipment is more expensive and the sensitivity is not high enough

The anti-interference ability of chemical sensors is weak

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