Matsuta Hideyuki, Naeem Tariq M, Wagatsuma Kazuaki
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan.
Anal Sci. 2003 Jun;19(6):813-4. doi: 10.2116/analsci.19.813.
A novel emission excitation source comprising a high repetition rate diode-pumped Q-switched Nd:YAG laser and a Grimm-style glow-discharge lamp is described. Laser-ablated atoms are introduced into the He glow discharge plasma, which then give emission signals. By using phase-sensitive detection with a lock-in amplifier, the emission signal modulated by the pulsed laser can be detected selectively. It is possible to estimate only the emission intensity of sample atoms ablated by laser irradiation with little interference from the other species in the plasma.
