A New Approach to the Investigation of Pre-atomization Analyte Loss Mechanisms Occurring within a Graphite Furnace Atomizer

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A new method for probing the kinetics of analyte loss mechanisms occurring during the thermal pretreatment stage of analysis using graphite furnace atomic absorption spectrometry is described. The method involves the monitoring of the relative magnitude of the atomic absorption signal while systematically varying the pretreatment furnace temperature and time. The pre-atomization loss of Cu is discussed. The kinetics of the loss mechanism for Cu appear to be second order with an activation energy of 44± 6 kcal/mole.

Keywords: Analyte loss mechanisms; Graphite furnace; atomic absorption

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702914335887

Affiliations: 1: Department of Chemistry, New Mexico State University, Las Cruces, New Mexico 88003 2: Department of Chemistry, University of Texas, Austin, Texas 78712; present address: Max Planck Institute für Molekulare Genetiks, Ihn estrabe 73, D-1000 Berlin 33 (Dahlem), Germany

Publication date: September 1, 1991

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