A new atomization cell for trace metal determinations by tungsten coil atomic spectrometry

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Environmental Analysis

Background:

• Trace metal determination is crucial for environmental monitoring.
• Existing atomization cells can limit sensitivity and precision.
• Tungsten coil atomization offers potential for enhanced elemental analysis.

Purpose of the Study:

• To develop and evaluate a new metallic atomization cell for trace metal analysis.
• To optimize protecting gas mixtures and operational parameters for atomic absorption spectrometry (AAS) and atomic emission spectrometry (AES).
• To determine the figures of merit and assess the performance of the new cell for elemental quantification.

Main Methods:

• Utilized a novel metallic atomization cell with tungsten coil AAS and AES.
• Investigated various protecting gas mixtures (Ar, N(2), CO(2), He) and solutes (H(2), C(2)H(2)).
• Optimized protecting gas flow rate and atomization current, then determined limits of detection (LODs) for selected metals.

Main Results:

• A H(2)/Ar protecting gas mixture yielded optimal atomic emission signals.
• The new cell provided a more controlled, isothermal environment, leading to concentrated atomic clouds and reduced background signals.
• Achieved low LODs for Cu, Cd, Sn (AAS) and Cr, Eu, Sr (AES), with successful determination in a water standard reference material.

Conclusions:

• The new metallic atomization cell significantly improves sensitivity and lowers detection limits for trace metal analysis by AAS and AES.
• Optimized conditions and gas mixtures enhance the performance of tungsten coil atomization techniques.
• The method demonstrates accuracy and reliability for quantifying trace metals in environmental water samples.