Glow discharge source atomization for the laser-excited atomic fluorescence spectrometric studies of indium

A demountable glow discharge source has been used for the atomization of the analyte solutions deposited on graphite and copper rod cathodes. Indium atoms are sputtered-atomized from the cathode surface and are excited by a pulsed, frequency-doubled dye laser pumped by the nitrogen laser. Atomic fluorescence measurements were performed using the non-resonance fluorescence transition. The detection limits of indium in aqueous solutions (10μl) deposited on graphite and copper electrodes were 8 × 10⁻⁹ and 11 × 10⁻⁹g, respectively (8 ng and 11ng).