title: Two-dimensional multiple entrance-slit vidicon spectrometer for simultaneous multielement analysis.
abstract: A new type of wavelength dispersion system for use with a multichannel detector has been developed for simultaneous multielement analysis. The system employs a monochromator with fixed grating position, and incident angle varied by horizontal displacement of the entrance slits. The overlapping spectral windows which result can be arranged to produce a composite spectrum having minimal interference from emissions by other sample constituents. Entrance slits may also be displaced vertically to create a two-dimensional system in which spectra are stacked one above the other and scanned by use of a multi-raster scanning pattern. A number of optical and performance characteristics of the system are evaluated in both the one- and two-dimensional modes, and the system is applied to the determination of Ca, Na and K in blood serum and to the determination of the exchangeable cations Ca, Na, Li and K in clay. The advantages of this system for simultaneous multielement analysis are discussed.
authors.affiliation: Department of Chemistry, Baylor University, Waco, TX 76798-7348, U.S.A.
authors.forename: M A
authors.initials: MA
authors.lastname: Busch
authors.forename: K W
authors.initials: KW
authors.lastname: Busch
authors.forename: B B
authors.initials: BB
authors.lastname: Malloy