Abstract
The possibilities of hot hollow cathode atomization combined with laser-excited fluorescence detection for analysis of solutions and powdered samples are discussed. Optimum analytical conditions (discharge gas, its pressure and cathode temperature) were chosen. Significant improvement of signal-to-background ratio was provided by switching off the discharge current with excitation of fluorescence in the resulting afterglow. Detection limits of Co and Ni in dry residues of aqueous solutions were 15 pg ml and 5 ng ml , respectively. The possibility of Co trace determination in powdered Al 2O 3 and SiO 2 was shown.
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