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- W1662022844 abstract "Abstract : Optical emission spectroscopic techniques play a wide role in modern chemical analysis. Over the years, these techniques have achieved new realms of sensitivity, selectivity, and accuracy. Early instruments employing photographic emulsion readout have been largely replaced with computer controlled systems. These systems either scan various wavelength regions or, in the case of direct reading spectrometers, contain banks of discrete photomultiplier tubes used to simultaneously observe a limited number of carefully selected wavelengths. This so called progress has, without question, eliminated many laborious and time consuming tasks required to extract quantitative information from photographic emulsion. However, these time savings are costly because of the loss of the fantastic amount of information available when a large range of wavelengths are observed simultaneously. In atomic spectroscopy, most elements have several to hundreds of spectral lines; monitoring only one wavelength can lead to serious errors. Accurate background correction, source and system diagnostics and wavelength selection are often limited or compromised. Even with these significant problems, direct readers generally outperform scanning instruments which suffer from their inherent need to observe each discrete wavelength separately, whether background or analyte line." @default.
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- W1662022844 date "1988-02-04" @default.
- W1662022844 modified "2023-09-24" @default.
- W1662022844 title "The Electromagnetic Spectrum - The Information Mine." @default.
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