Laser-Excited Atomic Fluorescence of Eu, Y, and Tm in a Miniature Glow Discharge Atom Reservoir

摘要: A miniature glow discharge (GD) is evaluated as an atom reservoir for laser-excited atomic fluorescence spectrometric measurements of Eu, Y, and Tm. Nanoliter-sized aqueous samples are deposited dried on the Ni cathode atomized upon ignition GD. The population probed by a copper vapor laser pumped dye laser, direct-line detected. optimum chamber pressures operating currents 1 Torr 10 mA 2 3 40 temporal profiles found to consist short (~20-ms duration) transient spikes, followed long tails which last more than 60 s result sample redeposition surface. limits detection (3σ) fg, 1.2 pg, 0.08 fg Tm, respectively, with use signal area integration over 6-s duration. Theoretically simulated signals particular mass, considering geometry GD atomizer, were fall within one order magnitude those obtained experiment.