Abstract
This communication provides preliminary information about the set-up of a method for quantitative spectrographic survey analysis of liquids and solids covering major and minor constituents and using an inductively coupled plasma (ICP) in argon as excitation source and a computerized automatic microphotometer for the evaluation of the photographically recorded spectra. Three items are discussed, viz. 1. (i) a scheme of exposures that enables one to cover with photographic detection a dynamic range of 10 5 with a single spectral line; 2. (ii) a comparison of relative sensitivities in the argon ICP studied and the relative intensities tabulated for the NBS copper arc as an aid for preliminary line selection in the event that the common sensitive analysis lines are interfered with by lines of the matrix; 3. (iii) the entrance optics used with a 3.4-m Ebert spectrograph including as additional components a 0.25-m monochromator for monitoring the ICP conditions and an air-stabilized iron are for producing familiar identification spectra for visual inspection of ICP spectra.
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