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High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

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Operator-free flow injection analyser.

C Pasquini¹, L C de Faria

¹Instituto de Quimica - Universidade Estadual de Campinas C.P. 6154 Campinas SP CEP 13081 Brazil.

The Journal of Automatic Chemistry

|January 1, 1991

Summary

This summary is machine-generated.

A new flow injection analyser (FIA) enables automated, operator-free sample analysis for up to 40 samples. This system demonstrates high precision for chromium(VI) determination, achieving a 0.5% relative standard deviation.

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Area of Science:

Analytical Chemistry
Instrumentation Science

Background:

Automated analytical systems reduce manual labor and improve reproducibility.
Flow Injection Analysis (FIA) offers rapid and efficient sample throughput.

Purpose of the Study:

To develop and evaluate an automated, operator-free flow injection analyser.
To assess the performance of the developed system for trace metal determination.

Main Methods:

Construction of a novel sample introduction device using electromechanical valves.
Integration of an auto-sampler with a microcomputer control system (SDK-8085).
Development of an interface for coupling analyser components to the microcomputer.

Main Results:

The automated FIA system successfully analyzed up to 40 samples without operator intervention.
Excellent performance was demonstrated for chromium(VI) determination.
A relative standard deviation of 0.5% was achieved for Cr(VI) analysis.

Conclusions:

The developed flow injection analyser provides a robust and precise platform for automated chemical analysis.
The system's design facilitates operator-free operation and high sample throughput.
The validated Cr(VI) determination showcases the system's analytical capabilities.