portable electrochemical sensor

1. PORTABLE ELECTROCHEMICAL SENSOR
Presented By: Priya Katiyar
(2022PMS5225)
Materials Research Centre
Malaviya National Institute of Technology Jaipur
COURSE SEMINAR

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Outlines
 Introduction
 Basic Components
 Analysis Methods
 Electrode Modification Methods
 Applications
 Advantages
 Disadvantages
 References
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INTRODUCTION
PORTABLE ELECTROCHEMICAL SENSOR
 A compact and portable device that utilizes electrochemical
principles to detect and measure specific pollutants or
compounds in environmental samples.
 Designed to be easy to operate, low-cost, and offer high
sensitivity, selectivity, and accuracy.
 Used for on-site analysis and monitoring of environmental
pollution, providing fast and effective measurements of
compound concentrations in environmental samples.

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BASIC COMPONENTS
 Working Electrode
 Reference Electrode
 Counter Electrode
 Electrolyte
 Transducer
 Power Source
 Measurement and Control Electronics

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Basic principle of electrochemical sensor
Fig. Conductive Hydrogel-Based Electrochemical Sensor: A Soft Platform for Capturing Analyte
Li Fu , Aimin Yu , Guosong Lai

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ANALYSIS METHODS
 Amperometry
 Voltammetry
 Potentiometry
 Impedance spectroscopy
 Chronoamperometry
 Chronopotentiometry

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Fig. Types of portable electrochemical sensors : smart phone based , screen printed , pocket
sized potentiostat , paper based and inkjet printed paper based .

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ELECTRODE MODIFICATION METHODS
Polymer Coating : Conductive Polymers
(polypyrrole, polyaniline, and polythiophene) and
Molecularly Imprinted Polymers (MIPs)
Enzyme Immobilization
Electrodeposition : Metal Deposition and
Nanoparticle Deposition (gold, silver, platinum)
Metal-Organic Frameworks (MOFs)
Chemical Modification: Surface
Functionalization [Chemicals, such as self-
assembled monolayers (SAMs)]
Functionalization with CNTs or Graphene

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APPLICATIONS
Fig. Research on the construction of portable electrochemical sensors for environmental compounds
quality monitoring
Quanguo He, Bing Wang, Jing Liang, Jun Liu, Bo Liang , Guangli Li, Yaohang Long , Gongyou Zhang , Hongmei Liu

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ADVANTAGES
 Portability
 High sensitivity
 Selectivity
 Low cost
 Simple operation
 High accuracy
 Real-time Monitoring
 Miniaturization

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DISADVANTAGES
 Limited detection range
 Limited selectivity
 Calibration requirements
 Sensitivity to environmental conditions
 Limited lifespan
 Response Time
 Interference from Matrix Components

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REFERENCES

13. Thank you !
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