Atomic-absorption spectrometry of laser-nebulized samples

Area of Science:

• Analytical Chemistry
• Materials Science
• Spectroscopy

Background:

• Traditional methods for analyzing nickel-base alloys and other materials can be complex.
• Efficient aerosol generation is crucial for accurate flame atomic absorption spectroscopy.

Purpose of the Study:

• To develop and evaluate a laser-induced thermal nebulization technique for solid samples.
• To assess the analytical performance for elemental analysis in an acetylene-air flame.

Main Methods:

• Laser beam was used for thermal nebulization of nickel-base alloys, corundum plates, and solution residues.
• Generated solid aerosol was aspirated into an acetylene-air flame using an ejector.
• Elemental concentrations were determined using flame atomic absorption spectroscopy.

Main Results:

• Linear analytical curves were obtained over wide concentration ranges.
• An average relative standard deviation of 10% was achieved.
• Detection limits in the nanogram (ng) range were observed for iron and copper, with even lower limits for zinc, cadmium, and sodium.

Conclusions:

• Laser-induced thermal nebulization is a viable method for preparing solid samples for flame analysis.
• The technique provides good linearity and sensitivity for the determination of multiple elements.
• This approach offers a promising alternative for the elemental analysis of challenging matrices.