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Summary

This summary is machine-generated.

This study details a microcomputer system for graphite furnace atomic absorption spectrometry data acquisition. The system enhances trace metal analysis by improving data handling and storage for accurate results.

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Area of Science:

Analytical Chemistry
Spectroscopy
Environmental Science

Background:

Atomic absorption spectrometry (AAS) is a key technique for trace metal analysis.
Graphite furnace AAS offers high sensitivity but requires advanced data handling due to transient signals.
Commercial AAS systems often have limited data processing and storage capabilities.

Purpose of the Study:

To describe a microcomputer-based system for data acquisition and analysis in graphite furnace atomic absorption spectrometry.
To overcome limitations of built-in microprocessors in commercial AAS instruments.
To provide a flexible platform for trace metal analysis and data integration.

Main Methods:

Utilized an Apple IIe microcomputer interfaced with a Pye Unicam SP9 graphite furnace AAS.
Developed an interface using an in-house designed analog-to-digital converter.
Employed Pascal and assembler programs for data recording, storage, graphical display, and analysis.
Implemented a moving quadratic fit routine for calibration curve construction.
Demonstrated data transfer to an Amstrad PC 1512 for further processing.

Main Results:

The system successfully recorded, stored, and displayed furnace signals.
Peak height and area data were formatted into spreadsheets for analysis.
Calibration graphs were constructed, and analyte concentrations in unknown samples were calculated.
An analytical method for silver in plant material was developed using the system.
Data export capabilities facilitated integration with other analytical schemes.

Conclusions:

The developed Apple IIe microcomputer system effectively enhances data acquisition and processing for graphite furnace atomic absorption spectrometry.
This approach provides a flexible and powerful alternative to limitations in commercial instrument software.
The system facilitates accurate trace metal analysis and integration into broader analytical workflows.