Investigation of the order of copper atomization at the absorbance maximum in graphite furnace atomic absorption spectrometry

Two methods to determine the order of the atom formation reaction from the absorbance signal profile are proposed. In one method, the first-order assumption, which is often used to develop various Arrhenius-type plots in graphite furnace atomic absorption spectrometry (GFAAS), is graphically verifie...

Full description

Saved in:
Bibliographic Details
Published in:Spectrochimica acta. Part B: Atomic spectroscopy 1991, Vol.46 (1), p.35-44
Main Authors: Cathum, S.J., Chakrabarti, C.L., Hutton, J.C.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two methods to determine the order of the atom formation reaction from the absorbance signal profile are proposed. In one method, the first-order assumption, which is often used to develop various Arrhenius-type plots in graphite furnace atomic absorption spectrometry (GFAAS), is graphically verified by plotting log ( A m T m 2) vslog ▪, where the subscript m indicates the value of the subscripted term XXX the absorbance maximum. The linearity of this plot verifies the first-order assumption. The other method allows one to determine the order of the atom formation reaction at the maximum of the absorbance signal using the equation, ▪. The order of the atom formation reaction of copper from a pyrolytically coated graphite tube was found to be 0.95 ± 0.04 by the graphical method, and 1.01 ± 0.04 by the method of calculation, indicating that the atomization of copper does indeed follow first-order kinetics.
ISSN:0584-8547
1873-3565
DOI:10.1016/0584-8547(91)80004-M