Three-dimensional structure of the radiation beam in atomic absorption spectrometry

The results of an investigation of the three-dimensional distribution of radiant intensity in the probing radiation beam produced in a conventional atomic absorption spectrometer by hollow cathode lamps and electrodeless discharge lamps are presented. The investigation is based on the use of a photo...

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Bibliographic Details
Published in:Spectrochimica acta. Part B : Atomic spectroscopy 1996-07, Vol.51 (9), p.931-940
Main Authors: Gilmutdinov, A.Kh, Radziuk, B., Sperling, M., Welz, B., Nagulin, K.Yu
Format: Article
Language:English
Subjects:
Analytical chemistry
Atomic absorption spectrometry
Beam optics
Beam profile, beam intensity
Beer-Lambert's law
Chemistry
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Radiation beam structure
Spectrometric and optical methods
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Summary:The results of an investigation of the three-dimensional distribution of radiant intensity in the probing radiation beam produced in a conventional atomic absorption spectrometer by hollow cathode lamps and electrodeless discharge lamps are presented. The investigation is based on the use of a photodiode array-based digital imaging system. The results obtained revealed that the probing radiation beam is highly non-uniform, both longitudinally and radially. The character of the non-uniformities is greatly dependent on the type of the primary source. An interpretation of the results is given and the possible consequences of the radiation beam non-uniformities for the application of Beer-Lambert's law are discussed.
ISSN:0584-8547
1873-3565
DOI:10.1016/0584-8547(96)01479-6