Correlation of spectral emission intensity in the inductively coupled plasma and laser-induced plasma during laser ablation of solid samples
- Lawrence Berkeley Lab., CA (United States)
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 lCP 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. 32 refs., 10 figs., 1 tab.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 81688
- Journal Information:
- Analytical Chemistry (Washington), Journal Name: Analytical Chemistry (Washington) Journal Issue: 14 Vol. 67; ISSN ANCHAM; ISSN 0003-2700
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
40 CHEMISTRY
42 ENGINEERING
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
66 PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ALUMINIUM
COPPER
EMISSION
LASERS
MASS SPECTRA
MASS SPECTROMETERS
MEASURING INSTRUMENTS
METALS
OXIDES
PLASMA
QUANTITATIVE CHEMICAL ANALYSIS
SOLIDS
USES
ZINC