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The effect of ultrafast laser wavelength on ablation properties and implications on sample introduction in inductively coupled plasma mass spectrometry.

Authors
LaHaye-NL; Harilal-SS; Diwakar-PK; Hassanein-A; Kulkarni-P
Source
J Appl Physi 2013 Jul; 114(2):023103
NIOSHTIC No.
20042996
Abstract
We investigated the role of femtosecond (fs) laser wavelength on laser ablation (LA) and its relation to laser generated aerosol counts and particle distribution, inductively coupled plasma-mass spectrometry (ICP-MS) signal intensity, detection limits, and elemental fractionation. Four different NIST standard reference materials (610, 613, 615, and 616) were ablated using 400 nm and 800 nm fs laser pulses to study the effect of wavelength on laser ablation rate, accuracy, precision, and fractionation. Our results show that the detection limits are lower for 400 nm laser excitation than 800 nm laser excitation at lower laser energies but approximately equal at higher energies. Ablation threshold was also found to be lower for 400 nm than 800 nm laser excitation. Particle size distributions are very similar for 400 nm and 800 nm wavelengths; however, they differ significantly in counts at similar laser fluence levels. This study concludes that 400 nm LA is more beneficial for sample introduction in ICP-MS, particularly when lower laser energies are to be used for ablation.
Keywords
Mass-spectrometry; Aerosol-generators; Aerosols; Particle-counters; Lasers; Analytical-instruments; Sampling-equipment; Signaling-systems; Heat-treatment; Spectroscopes; Author Keywords: aerosols; high-speed optical techniques; laser ablation; mass spectra
CODEN
JAPIAU
Publication Date
20130714
Document Type
Journal Article
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
B20130805; M082013
Issue of Publication
2
ISSN
0021-8979
NIOSH Division
DART
Priority Area
Manufacturing
Source Name
Journal of Applied Physics
State
IN; OH
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