TY - JOUR KW - Comparison KW - Energy KW - Transportation KW - USA KW - Standards KW - Efficiency KW - Calibration KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Analysis KW - Applications KW - State KW - Time KW - Ca KW - E KW - Fractionation KW - Glass KW - Glasses KW - Icp-ms KW - Icp-ms KW - Icp-ms KW - Liquid KW - Matrix KW - Nebulization KW - Sample KW - Chemical analysis KW - Chemical analysis KW - Lasers KW - Ratio KW - Science KW - Crater KW - England KW - Excimer KW - Linear KW - Volume KW - Interference KW - Mixture KW - 266 nm KW - Energies KW - Nm KW - 213 nm KW - Ablation icp-ms KW - Laser ablation icp-ms KW - Laser ablation icp-ms KW - Nist KW - Nist glass KW - Standard KW - Wavelength KW - 193 nm KW - Arf KW - Bond KW - Crater geometry KW - Depth KW - Geometry KW - M KW - Microanalysis KW - Microprobe KW - Ms KW - Nd KW - Penetration KW - Penetration-depth KW - Plasma-mass spectrometry KW - Transport efficiency KW - Wavelengths KW - White-light KW - Yag AU - Jhanis J Gonzalez AU - Xianglei Mao AU - John Roy AU - Samuel S Mao AU - Richard E Russo AB -

There is a widespread discussion concerning the 'better' wavelength for laser ablation chemical analysis. Wavelength is believed to be an important parameter based on the sample's optical penetration depth as well as photon energy for bond breaking. The lasers most widely employed for analytical applications are the excimer, based on an ArF mixture with a wavelength of 193 nm, and the solid state Nd: YAG, with wavelengths of 266 nm and 213 nm. NIST glasses were ablated to test the effects of these wavelengths on fractionation and transport efficiency. Crater geometry and volume were measured by using a white-light interference microscope. For all three wavelengths, linear calibration curves were obtained using NIST glasses as standards. The 208Pb/238U ratio in a tuff rock sample was measured using all three wavelengths; the value obtained using the NIST-glass calibration was compared to that measured using liquid nebulization

AD -

Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

BT - Journal of Analytical Atomic Spectrometry C2 - LBNL-51125 DO - 10.1039/B202122F IS - 9 LA - eng LB - Laser N2 -

There is a widespread discussion concerning the 'better' wavelength for laser ablation chemical analysis. Wavelength is believed to be an important parameter based on the sample's optical penetration depth as well as photon energy for bond breaking. The lasers most widely employed for analytical applications are the excimer, based on an ArF mixture with a wavelength of 193 nm, and the solid state Nd: YAG, with wavelengths of 266 nm and 213 nm. NIST glasses were ablated to test the effects of these wavelengths on fractionation and transport efficiency. Crater geometry and volume were measured by using a white-light interference microscope. For all three wavelengths, linear calibration curves were obtained using NIST glasses as standards. The 208Pb/238U ratio in a tuff rock sample was measured using all three wavelengths; the value obtained using the NIST-glass calibration was compared to that measured using liquid nebulization

PY - 2002 SP - 1108 EP - 1113 ST - J. Anal. At. Spectrom. T2 - Journal of Analytical Atomic Spectrometry TI - Comparison of 193, 213 and 266 nm laser ablation ICP-MS VL - 17 ER -