Experimental and theoretical comparison of the precision of flame atomic absorption, fluorescence, and emission measurements

Journal Article · Fri May 01 04:00:00 EDT 1981 · Appl. Spectrosc.; (United States)

DOI:https://doi.org/10.1366/0003702814732643· OSTI ID:6231159

Bower, N W; Ingle, Jr, J D

Theoretical equations and experimental evaluation procedures for the determination of the precision of flame atomic absorption, emission, and fluorescence measurements are presented. These procedures and noise power spectra are used to evaluate the precision and noise characteristics of atomic copper measurements with all three techniques under the same experimental conditions in a H/sub 2/-air flame. At the detection limit, emission and fluorescence measurements are limited by background emission shot and flicker noise whereas absorption measurements are limited by flame transmission lamp flicker noise. Analyte flicker noise limits precision at higher analyte concentrations for all three techniques. Fluctutations in self-absorption and the inner filter effect are shown to contribute to the noise in atomic emission and fluorescence measurements.

• Research Organization: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331
• OSTI ID: 6231159
• Journal Information: Appl. Spectrosc.; (United States), Journal Name: Appl. Spectrosc.; (United States) Vol. 35:3; ISSN APSPA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ABSORPTION SPECTROSCOPY
COMPARATIVE EVALUATIONS
EMISSION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
SIGNAL-TO-NOISE RATIO
SPECTROSCOPY