TY - JOUR KW - Surfaces KW - Deposition KW - Energy KW - Surface KW - Emission KW - Power KW - Behavior KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Spectroscopy KW - Analysis KW - Vaporization KW - Time KW - Composition KW - Glass KW - Inductively coupled plasma (icp) KW - Inductively-coupled plasma KW - Mass KW - Mass spectrometry KW - Plasma KW - Precise KW - Sample KW - Sampling KW - Ablated mass KW - Ablation rate KW - Atomic emission KW - Atomic emission spectroscopy KW - Chemical analysis KW - Chemical analysis KW - Constant KW - Emission spectroscopy KW - Emission spectroscopy KW - Direct solid sampling KW - Icp-aes KW - Density KW - Energies KW - Solid samples KW - Laser ablation sampling KW - Laser power density KW - Laser-induced plasma KW - Area KW - Region KW - Removal AU - Xianglei Mao AU - Wing-Tat Chan AU - Richard E Russo AB -

The influence of sample surface condition on chemical analysis was investigated when using laser ablation sampling with inductively coupled plasma atomic emission spectroscopy (ICP-AES), The ablated mass quantity and composition were found to be significantly different from original vs, pre-ablated surfaces. The ablated mass quantity from original surfaces was much greater than that from pre-ablated surfaces, and the ablation rate (mass per unit area and time) was constant or independent of power density below 0.3 GW/cm2. For pre-ablated surfaces, the mass ablation rate follows exponential behavior in the same power density region. The measured composition of the ablated mass was found to be dependent on the surface condition and laser power density, for both original and pre-ablated surfaces. Understanding the influence of laser energy and surface conditions on mass ablation is essential for accurate and precise chemical analysis

AD -

UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

AN - 80 BT - Applied Spectroscopy C2 - LBNL-40372 DA - 07/1997 IS - 7 LA - eng LB - Laser N1 -

LBNL-40372 NOT IN FILE

N2 -

The influence of sample surface condition on chemical analysis was investigated when using laser ablation sampling with inductively coupled plasma atomic emission spectroscopy (ICP-AES), The ablated mass quantity and composition were found to be significantly different from original vs, pre-ablated surfaces. The ablated mass quantity from original surfaces was much greater than that from pre-ablated surfaces, and the ablation rate (mass per unit area and time) was constant or independent of power density below 0.3 GW/cm2. For pre-ablated surfaces, the mass ablation rate follows exponential behavior in the same power density region. The measured composition of the ablated mass was found to be dependent on the surface condition and laser power density, for both original and pre-ablated surfaces. Understanding the influence of laser energy and surface conditions on mass ablation is essential for accurate and precise chemical analysis

PY - 1997 SP - 1047 EP - 1054 T2 - Applied Spectroscopy TI - Influence of sample surface condition on chemical analysis using laser ablation inductively coupled plasma atomic emission spectroscopy UR - http://www.opticsinfobase.org/as/abstract.cfm?URI=as-51-7-1047 VL - 51 ER -