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Atomic Fluorescence Spectrometry with a Graphite Rod Atomizer and Thermostated Electrodeless Discharge Lamps

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Abstract:

Atomic fluorescence investigations with a graphite rod atomizer and thermostated multiple element electrodeless discharge lamps (EDL's) are reported for Ag, Cd, Cu, Hg, Pb, Sn, Tl, and Zn. Detection limits in the range 10−10 to 10−14 g have been obtained for these elements using a sample volume of 0.5 μl. The detection limits are better than, or close to, the lowest reported values obtained by other workers using atomic spectrometric methods. No spectral or chemical interferences have been observed when using multiple element EDL's or standard multielement solutions.

The atomic fluorescence signal obtained using argon and argon-hydrogen atmospheres has been studied as a function of the gas flow rates and as a function of height above the graphite rod atomizer. Except for Hg, better fluorescence signals are obtained with argon-hydrogen.

Keywords: Analytical curves; Atomic fluorescence; Decay of atomic populations; Detection limits; Graphite rod atomizer; Multiple element electrodeless discharge lamps

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370273774333597

Affiliations: 1: Department of Chemistry, University of Florida, Gainesville, Florida 32601 2: Department of Chemistry, University of Florida, Gainesville, Florida 32601; on leave: Department of Chemistry and Biochemistry, Massey University, Palmerston North, New Zealand

Publication date: May 1, 1973

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