Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Instrumentation for a "foodsafe analyser"

Instrumentation development for a "FOODSAFE ANALYSER" was initiated by creating a block diagram incorporating the significant analogue and digital requirements of the instrumentation. To ensure the maximum speed and performance of the microprocessor the assembly language was chosen for the software development. For the same reasons, the direct memory access mode (DMA) microprocessor ADC operation was used. In order to broaden the functional characteristics of the instrument there are two algorithms of working signal generation were implemented: staircase, and differential pulse techniques. For the purposes of visualisation of electrochemical measurements and their comparison with the measurement from standard industrial equipment the PC software using Delphi 6 programming system was developed. Development of amperometric measurement mode and integration prototype of stand alone instrument with microfluidic system. As a part of instrumentation activities the amperometric measurement mode and means for integration with immunosensor microfluidic system has been introduced into developing prototype of the standalone instrument "FOODSAFE ANALYSER".

This enhancement of instrumentation capabilities demanded of hardware modernisation (microcontroller port extending, using additional microcontroller ADC input and DAC output) and development of special software. PRELIMINARY TESTING OF SYSTEM WITH ELECTROCHEMICAL IMMUNOSENSOR DEVICE Amperometric electrochemical data sets involving carbon electrodes were used to define suitable signal processing algorithms, which will be of generic interest to biosensors based on amperometric measurements, NMRC will continue verification of these methods as further amperometric data sets become available.

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Reported by

NMRC, Lee Maltings, Prospect Row