A polyporphyrin/nano-gold modified glassy carbon electrode, preparation method and application thereof

Abstract

The invention discloses a polyporphyrin / nano-gold modified glassy carbon electrode, a preparation method and an application thereof. The polyporphyrin / nano-gold modified glassy carbon electrode comprises a glassy carbon electrode, and nano-gold particles are deposited on the surface of the glassy carbon electrode, and are also covered with a polymerized tetraphenylporphyrin film layer; the electrode preparation method includes steps: 1, synthesis and Prepare tetraphenylporphyrin solution; 2. Prepare chloroauric acid solution; 3. Prepare nano-gold modified glassy carbon electrode; 4. Prepare polyporphyrin / nano-gold modified glassy carbon electrode; 5. Dry the electrode at room temperature. The electrode can be applied to the detection of trace lead ions. The invention has the advantages of high detection sensitivity, good reproducibility, wide linear range and low detection limit when the electrode is used for detecting metal 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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