TY - JOUR KW - Energy KW - Temperature KW - Emission KW - Power KW - Behavior KW - Material KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Induced breakdown spectroscopy KW - Analysis KW - Intensities KW - Intensity KW - Oxide KW - Time KW - Beam KW - Composition KW - Inductively coupled plasma (icp) KW - Inductively-coupled plasma KW - Mass KW - Mass spectrometry KW - Plasma KW - Sample KW - Samples KW - Sampling KW - Ablation rate KW - Atomic emission KW - Chemical analysis KW - Chemical analysis KW - Dependence KW - Icp KW - Process KW - Ratio KW - Spectral emission intensity KW - Elemental analysis KW - Metals KW - Plasmas KW - Density KW - Laser sampling KW - Ablation process KW - Energies KW - Laser ablation process KW - Solid samples KW - Correlation KW - Dc KW - Ha KW - Inductively-coupled plasma KW - Iron-ore KW - Laser ablation sampling KW - Laser beam KW - Laser-induced plasma KW - Laser power density KW - Laser-induced plasma KW - Laser-induced plasmas KW - Melting KW - Metallic KW - Size AU - Alberto J Fernández AU - Xianglei Mao AU - Wing-Tat Chan AU - Mark A Shannon AU - Richard E Russo AB -

Spectral atomic emission intensity from laser-induced plasmas (LIPs) exhibits excellent correlation with atomic emission intensity in the inductively coupled plasma (ICP) for a wide variety of materials and laser powers. Laser ablation sampling with introduction into an ICP for chemical analysis has, among other factors, a strong nonlinear dependence on laser energy, spot size, and material composition. The LIP emission also has a similar nonlinear dependence and is shown to correspond with the ICP behavior. The correlation is demonstrated for several homogeneous metallic and oxide materials during laser ablation sampling over a range of power densities and incident laser beam spot sizes. The correlation is best for higher melting temperature materials and moderate laser power density. The LIP and ICP emission intensities both show similar dependence for mass ablation rate versus power density and laser beam spot size. A normalized ICP/area over LIP emission ratio shows that a functional relationship can be found for changes in ICP intensity with changes in laser power density. The correlation shows that the ICP intensity accurately reflects changes in the laser ablation process and that the LIP may possibly be used for internal monitoring during laser sampling with the ICP

AD -

LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

AN - 63 BT - Analytical Chemistry C2 - LBNL-37391 LA - eng LB - Laser N1 -

LBNL-37391 NOT IN FILE

N2 -

Spectral atomic emission intensity from laser-induced plasmas (LIPs) exhibits excellent correlation with atomic emission intensity in the inductively coupled plasma (ICP) for a wide variety of materials and laser powers. Laser ablation sampling with introduction into an ICP for chemical analysis has, among other factors, a strong nonlinear dependence on laser energy, spot size, and material composition. The LIP emission also has a similar nonlinear dependence and is shown to correspond with the ICP behavior. The correlation is demonstrated for several homogeneous metallic and oxide materials during laser ablation sampling over a range of power densities and incident laser beam spot sizes. The correlation is best for higher melting temperature materials and moderate laser power density. The LIP and ICP emission intensities both show similar dependence for mass ablation rate versus power density and laser beam spot size. A normalized ICP/area over LIP emission ratio shows that a functional relationship can be found for changes in ICP intensity with changes in laser power density. The correlation shows that the ICP intensity accurately reflects changes in the laser ablation process and that the LIP may possibly be used for internal monitoring during laser sampling with the ICP

PY - 1995 SP - 2444 EP - 2450 T2 - Analytical Chemistry TI - Correlation of Spectral Emission Intensity in the Inductively-Coupled Plasma and Laser-Induced Plasma During Laser-Ablation of Solid Samples VL - 67 ER -