The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1984
Filed:
Mar. 04, 1981
Stanley B Smith, Jr, Westford, MA (US);
Gary M Hieftje, Bloomington, IN (US);
Instrumentation Laboratory Inc., Lexington, MA (US);
Abstract
An atomic absorption system comprising a radiation source that emits spectral line radiation characteristic of an element to be analyzed, an analysis region open to passage of the beam of radiation from the source and in which a sample of the substance to be analyzed is atomized, source control means for alternately energizing the source at a first intensity level to provide a radiation output that has a narrow spectral line at a wavelength of an element to be detected and at a higher intensity level to provide a radiation output of broader wavelength with intensity suppression at the wavelength of the narrow spectral line, electronic transducing means for developing an electrical signal corresponding to the sensed radiation intensity of the radiation beam that passes through the analysis region, and a log ratio circuit that utilizes integrated electrical signals corresponding to the two source energization intensity levels to provide background corrected concentration information on the element of interest in the analyzed sample.