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http://dx.doi.org/10.4150/KPMI.2012.19.4.297

A Study on Voltammetry System Design for Realizing High Sensitivity Nano-Labeled Sensor of Detecting Heavy Metals  

Kim, Ju-Myoung (Nano Technology Inc.)
Rhee, Chang-Kyu (Nuclear Materials Development Division, Korea Atomic Energy Research Institute (KAERI))
Publication Information
Journal of Powder Materials / v.19, no.4, 2012 , pp. 297-303 More about this Journal
Abstract
In this study, voltammetry system for realizing high sensitivity nano-labeled sensor of detecting heavy metals was designed, and optimal system operating conditions were determined. High precision digital to analog converter (DAC) circuit was designed to control applied unit voltage at working electrode and analog to digital converter (ADC) circuit was designed to measure the current range of $0.1{\sim}1000{\mu}A$ at counter electrode. Main control unit (MCU) circuit for controlling voltammetry system with 150 MHz clock speed, main memory circuit for the mathematical operation processing of the measured current value and independent power circuit for analog/digital circuit parts to reduce various noise were designed. From result of voltammetry system operation, oxidation current peaks which are proportional to the concentrations of Zn, Cd and Pb ions were found at each oxidation potential with high precision.
Keywords
Bi nanopowder electrode; Heavy metal detection; Square wave anodic stripping voltammetry system;
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