TY - JOUR
KW - Environment
KW - Gas
KW - USA
KW - Emission
KW - Efficiency
KW - Behavior
KW - Ions
KW - Ablation
KW - Laser
KW - Laser ablation
KW - Laser ablation
KW - Spectroscopy
KW - Analysis
KW - Vaporization
KW - Intensities
KW - Intensity
KW - Time
KW - Ca
KW - E
KW - Inductively coupled plasma (icp)
KW - Inductively-coupled plasma
KW - Plasma
KW - Sample
KW - Sampling
KW - Atomic emission
KW - Atomic emission spectroscopy
KW - Chemical analysis
KW - Chemical analysis
KW - Emission spectroscopy
KW - Emission spectroscopy
KW - Icp
KW - Mechanism
KW - Noble gases
KW - Excitation
KW - Ga
KW - Ionization
KW - Picosecond
KW - Picosecond laser
KW - Picosecond laser ablation
KW - Laser sampling
KW - Dc
KW - Inductively-coupled plasma
KW - Laser ablation sampling
KW - Sensitivity
KW - Aes
KW - Ar
KW - Atmosphere
KW - Enhancement
KW - Gases
KW - He
KW - High sensitivity
KW - Improvement
KW - Ne
KW - Noble gases
KW - Plasma shielding
KW - Trace
KW - Trace analysis
AU - Amy P. K Leung
AU - Wing-Tat Chan
AU - Xianglei Mao
AU - Richard E Russo
AB - <p>The effects of gas atmosphere on inductively coupled plasma excitation characteristics and picosecond laser ablation sampling are studied for enhancing atomic emission spectroscopy sensitivity. Five noble gases (He, Ne, Ar, Kr, Xe) were used in the laser ablation sampling chamber. The noble gases significantly influence the ICP excitation characteristics and the laser ablation sampling efficiency. There is an enhancement in ICP emission intensity for laser sampling in He and Ne and a decrease for Kr and Xe relative to Ar. Plasma shielding is a possible mechanism to explain the gas effects, as the behavior of laser sampling correlates with the ionization potential of the gas, The significant improvement in AES using He as the sample chamber gas is beneficial to chemical analysis, especially for trace analysis, which requires high sensitivity</p>
AD - <p>Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong Lawrence Berkeley Lab, Berkeley, CA 94720 USA</p>
AN - 105
BT - Analytical Chemistry
C2 - LBNL-42474
LA - eng
LB - Laser
N1 - <p>LBNL-42474 NOT IN FILE</p>
N2 - <p>The effects of gas atmosphere on inductively coupled plasma excitation characteristics and picosecond laser ablation sampling are studied for enhancing atomic emission spectroscopy sensitivity. Five noble gases (He, Ne, Ar, Kr, Xe) were used in the laser ablation sampling chamber. The noble gases significantly influence the ICP excitation characteristics and the laser ablation sampling efficiency. There is an enhancement in ICP emission intensity for laser sampling in He and Ne and a decrease for Kr and Xe relative to Ar. Plasma shielding is a possible mechanism to explain the gas effects, as the behavior of laser sampling correlates with the ionization potential of the gas, The significant improvement in AES using He as the sample chamber gas is beneficial to chemical analysis, especially for trace analysis, which requires high sensitivity</p>
PY - 1998
SP - 4709
EP - 4716
T2 - Analytical Chemistry
TI - Influence of gas environment on picosecond laser ablation sampling efficiency and ICP conditions
VL - 70
ER -