Development of a computer interfaced potentiostat for electroanalytical applications

Date

4-2002

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Macario P. Catahan

Co-adviser

Jose Rene L Micor

Abstract

A computer interfaced potentiostat was constructed using an existing analog, non-computer interfacable potentiostat and an IBM compatible personal computer. Application of the potential excitational signal for voltamtnetric processes is controlled by the personal computer through the digital-to-analog converter (DAC), which converts numeric values applied to the computer memory into voltage. The potentiostat converts the measured current response of a voltammetric process into a proportional voltage value that is automatically gathered by the personal computer through the analog-to-digital converter (ADC). The ADC converts an analog voltage signal into digitized form. which is the form of data that the computer can understand. To recreate the real world data in the computer, the relationship of the actual voltage with the response of the computer was determined through calibration. For the user to be able to control the functions of the computer interfaced potentiostat. the Potentiostat Control Program was constructed using LabVIEW RT version 5.1. Cyclic voltattnnetry and differential pulse voltammetry were performed using the computer interfaced potentiostat and the results were comparable with the voltammograms obtained from the Metrohm 693VA Processor controlled potentiostat.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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