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New developments in flow injection separation and preconcentration techniques for electrothermal atomic absorption

Z Fang¹, G Tao

¹Institute of Applied Ecology, Chinese Academy of Sciences, Box 417, 110015, Shenyang, People's Republic of China.

Analytical and Bioanalytical Chemistry

|June 1, 1996

Summary

This review covers flow injection (FI) online separation and preconcentration for electrothermal atomic absorption spectrometry (ETAAS). It highlights advancements in column techniques, solvent extraction, coprecipitation, and hydride sequestration.

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Area of Science:

Analytical Chemistry
Spectroscopy

Background:

Electrothermal atomic absorption spectrometry (ETAAS) is a powerful technique for elemental analysis.
On-line separation and preconcentration methods enhance ETAAS sensitivity and selectivity.
Flow injection (FI) systems offer automated sample handling for improved analytical efficiency.

Purpose of the Study:

To review developments in flow injection (FI) on-line separation and preconcentration systems for electrothermal atomic absorption spectrometry (ETAAS) since 1990.
To highlight specific advancements achieved in the authors' laboratory.
To discuss the advantages, limitations, and future potential of FI-ETAAS combinations.

Main Methods:

Review of scientific literature focusing on FI-ETAAS systems.
Detailed examination of on-line preconcentration techniques including column methods, solvent extraction, coprecipitation, and hydride sequestration.

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Analysis of system performance, including sensitivity, selectivity, and automation aspects.

Main Results:

Significant progress has been made in FI-ETAAS systems since 1990, particularly in on-line preconcentration.
Column techniques, solvent extraction, coprecipitation, and hydride sequestration have been successfully integrated with FI-ETAAS.
These integrated systems demonstrate improved analytical performance and broader applicability.

Conclusions:

FI-ETAAS systems offer substantial advantages for trace element analysis.
Continued development in on-line separation and preconcentration techniques is crucial for advancing ETAAS.
The FI-ETAAS combination holds significant potential for various analytical applications.