Atomic resonance line source lamps and spectrophotometers for use with such lamps
AssigneeU.S. Philips Corporation
InventorsTrevor J. Stockdale, Peter Morley
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Abstract
An improved source lamp assembly for use in atomic absorption spectrophotometers is described having encoded structures for identifying the atomic element of the source lamp assembly, as well as to represent lamp operating current. The encoding structures are formed by way of mechanical, optical, or magnetic means. In particular, a mechanical arrangement involves a plurality of projections and recesses, either formed relative to a base structure of the lamp assembly or relative to an attached card-like structure. A card reading device is used to read this card-like structure. These alternative arrangements can be also used relative to optical encoding or magnetic encoding.
Claims40
An atomic absorption spectrophotometer source lamp assembly comprising
- lamp means for producing resonance line radiation characteristic of at least one atomic element,
- encoding means for representing at least said radiation, and
- connecting circuit means for connecting said encoding means to a circuit enabling identification of said at least one atomic element.
An atomic absorption spectrophotometer comprising
- source lamp assembly means for producing radiation characteristic of at least one atomic element, said source lamp assembly means including lamp means for producing resonance line radiation characteristic of said atomic element, encoding means for representing at least said radiation, and connecting circuit means for connecting said encoding means to a circuit enabling identification of said at least one atomic element,
- measurement circuit means for identifying said atomic element, said measurement circuit means being connected to said encoding means through said connecting circuit means,
- atomizer means for atomizing samples to be analyzed by said radiation,
- monochromator circuit means for providing measurement wavelengths of said samples, said monochromator circuit means including a monochromator receiving radiation passed by said atomizer means,
- detector means for detecting said measurement wavelengths, said detector means being connected to said measurement circuit means
- microcomputer circuit means connected to elements of the spectrophotometer for controlling said spectrophotometer, said microcomputer means including
- microprocessor means for identifying said atomic element and for applying information to said monochromator circuit means, and
- read-only memory circuit means for holding wavelength information associated with said atomic element, said wavelength information being applied to said monochromator circuit means by said microprocessor means.
A spectrophotometer according to claim 29, wherein sensing means are arranged for detecting said projections and recesses.
Dependencies are inferred from the claim text.