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Chemically modified electrode array sensor for detecting heavy metal ions in water body

A heavy metal ion and electrode array technology, applied in scientific instruments, material electrochemical variables, instruments, etc., can solve problems such as slow analysis speed, inability to monitor online, expensive equipment, etc., achieve high sensitivity, improve adsorption capacity, and wide measurement range Effect

Active Publication Date: 2021-04-02
HUAZHONG UNIV OF SCI & TECH +1
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  • Description
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Problems solved by technology

Most of the conventional methods for heavy metal ion detection use large-scale analysis equipment, which has the advantages of high analysis accuracy and strong reliability, but the disadvantage is that the analysis speed is slow, online monitoring is not possible, and the equipment is expensive, which is not conducive to large-scale deployment

Method used

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  • Chemically modified electrode array sensor for detecting heavy metal ions in water body
  • Chemically modified electrode array sensor for detecting heavy metal ions in water body

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Embodiment 1

[0031] This embodiment comprises the following steps:

[0032] (1) Preparation of planar array electrodes. Using an alumina ceramic plate with a thickness of 1 mm, print the working electrode, counter electrode, and reference electrode on the alumina ceramic plate according to the above graphic structure, and use gold paste as the printing paste. The printed electrodes were sintered in a muffle furnace at 650 °C for 30 min to obtain stable bare electrodes.

[0033] (2) Chemically modified electrodes. SnO 2 Quantum wire material, WO 3 Quantum dot materials, PbS quantum dot materials, and pollen carbon materials modify different working electrode arrays.

[0034] (3) Multi-channel performance test. A multi-channel electrochemical workstation was used to test the performance of the sensor, and anodic stripping voltammetry was used to detect mercury ions, cadmium ions, lead ions, and chromium ions at a deposition voltage of -0.7V; among them, SnO 2 The loop enables specific de...

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Abstract

The invention belongs to the technical field of heavy metal ion detection, and discloses a chemically modified electrode array sensor for detecting heavy metal ions in a water body. The sensor is characterized by comprising a counter electrode, a reference electrode and a plurality of working electrodes, wherein on a working electrode array formed by the plurality of working electrodes, differentworking electrodes are modified with different electrode modification materials, and a three-electrode system can be formed among the counter electrode, the reference electrode and any one of the working electrodes; the sensor can detect various heavy metal ions at the same time through the selectivity of different electrode modification materials to the heavy metal ions. According to the invention, the structure and arrangement mode of the key components of the sensor are improved, the plurality of working electrodes are arranged, and different functional materials are modified on different working electrodes to obtain the chemically modified array electrodes, so that various heavy metal ions in a water body can be monitored at the same time, and good detection precision is achieved.

Description

technical field [0001] The invention belongs to the technical field of detection of heavy metal ions, and more specifically relates to a chemically modified electrode array sensor for detection of heavy metal ions in water bodies. Background technique [0002] Heavy metal ions such as lead, cadmium, mercury, and chromium in water seriously threaten human health. The World Health Organization and the Environmental Protection Organization have clear regulations on the content of heavy metal ions in water. Most of the conventional methods for heavy metal ion detection use large-scale analysis equipment, which has the advantages of high analysis accuracy and strong reliability, but the disadvantage is that the analysis speed is slow, cannot be monitored online, and the equipment is expensive, which is not conducive to large-scale deployment. The use of chemically modified electrodes for the detection of heavy metal ions has the advantages of low cost, fast analysis speed, and o...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 古瑞琴刘欢付会兵李华曜杨剑弦
Owner HUAZHONG UNIV OF SCI & TECH
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