Tereszchuk K A, Vadillo J M, Laserna J J
Department of Analytical Chemistry, University of Malaga, 29071 Malaga, Spain.
Appl Spectrosc. 2008 Nov;62(11):1262-7. doi: 10.1366/000370208786401491.
A glow discharge operating in steady-state and pulsed temporal conditions is used to excite the material previously excited by a pulsed laser ablation system. The system provides a simple means by which to potentially excite the material ablated by the incident laser pulse by taking advantage of enhanced collisional excitation. In this way, one can effectively reduce laser pulse energies below the excitation and ionization thresholds to potentially those required solely for laser ablation of the material, reducing sample damage and improving the lateral resolution. Several critical parameters such as the gas pressure, gas type, and discharge voltage were evaluated, demonstrating the potential of the technique for spatially resolved analysis. The new dual glow-discharge laser-induced breakdown spectroscopy (GD-LIBS) synchronous scheme provides significant signal enhancements when compared to LIBS or GD under identical conditions.
在稳态和脉冲时间条件下运行的辉光放电用于激发先前由脉冲激光烧蚀系统激发的材料。该系统提供了一种简单的方法，通过利用增强的碰撞激发来潜在地激发被入射激光脉冲烧蚀的材料。通过这种方式，可以有效地将激光脉冲能量降低到激发和电离阈值以下，潜在地降低到仅用于材料激光烧蚀所需的能量，从而减少样品损伤并提高横向分辨率。评估了几个关键参数，如气体压力、气体类型和放电电压，证明了该技术用于空间分辨分析的潜力。与相同条件下的激光诱导击穿光谱（LIBS）或辉光放电（GD）相比，新的双辉光放电激光诱导击穿光谱（GD-LIBS）同步方案提供了显著的信号增强。
