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Elemental analysis by diode laser spectroscopy
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DOI：10.1016/S0165-9936(98)00063-6.png)
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After about 25 years of development of laser analytical spectroscopy, laser spectrochemical instruments at present work efficiently only in research laboratories. There are practically no commercial laser spectroscopic instruments for routine elemental analysis, The only laser-based instruments are Raman spectrometers with stable cw laser sources for molecular analysis and pulsed lasers with fixed wavelengths which are used for laser ablation (LA) - laser sampling of solid materials, The main difficulties of laser spectroscopic techniques are: relatively high cost, insufficient reliability, and the necessity of qualified personal, Semiconductor laser-diodes are mass produced for compact disc players, laser printers, optical data storage systems and telecommunication equipment. A number of these laser diodes have excellent spectroscopic properties, which make them attractive sources for spectrochemical analysis. Presently, laser analytical instruments based on laser diodes have the highest potential for transfer from research laboratories to routine practice. Recently, the excellent analytical capabilities of diode laser spectrometry in the detection of low concentrations of analytes have been well documented. Recent advances in diode lasers and analytical trends are discussed below. (C) 1998 Elsevier Science B.V. All rights reserved.
Keyword:
diode laser spectroscopy
laser ablation
semiconductor laser diodes in spectroscopy
micromachining
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