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The objective comparison of related spectroscopic methods of analysis is discussed. Capability factors considered are: (a) scope of application, (b) sample preparation requirements, (c) sensitivity and limit of detection, (d) precision, and (e) accuracy. Economic factors considered are: (f) instrument cost or availability or both, (g) operational costs, (h) operator training requirements, and (i) time available for analysis. Methods considered are atomic absorption, atomic fluorescence, flame emission, arc-spark emission (photographic and direct reading), X-ray emission, and spark source mass spectroscopy. The method capability comparison of factors (c) through (e) is based primarily on the characteristics of the analytical calibration curve. A method for comparing the economic factors also is suggested.
atomic absorption, comparison, spectrochemical analysis, costs, sample preparation, sensitivity, limit of detection, precision, accuracy, analyzing, tests
Grant, C. L.
Research professor, University of New Hampshire, Durham, N. H.