High-resolution continuum-source atomic absorption spectrometry: what can we expect?
A new instrumental concept has been developed for atomic absorption spectrometry (AAS), using a high-intensity xenon short-arc lamp as continuum radiation source, a high-resolution double-echelle monochromator and a CCD array detector, providing a resolution of ~2 pm per pixel. Among the major advantages of the system are: i) an improved signal-to-noise ratio because of the high intensity of the radiation source, resulting in improved photometric precision and detection limits; ii) for the same reason, there are no more 'weak' lines, i.e. secondary lines can be used without compromises; iii) new elements might be determined, for which no radiation source has been available; iv) the entire spectral environment around the analytical line becomes 'visible', giving a lot more information than current AAS instruments; v) the CCD array detector allows a truly simultaneous background correction close to the analytical line; vi) the software is capable of storing reference spectra, e.g. of a molecular absorption with rotational fine structure, and of subtracting such spectra from the spectra recorded for a sample, using a least squares algorithm; vii) although not yet realized, the system makes possible a truly simultaneous multi-element AAS measurement when an appropriate two-dimensional detector is used, as is already common practice in optical emission spectrometry; vii) preliminary experiments have indicated that the instrumental concept could result in a more rugged analytical performance in the determination of trace elements in complex matrices.
Main Authors: | Welz,Bernhard, Becker-Ross,Helmut, Florek,Stefan, Heitmann,Uwe, Vale,Maria Goreti R. |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2003
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000200007 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Continuum source atomic absorption spectrometry: past, present and future aspects - a critical review
by: Welz,Bernhard, et al.
Published: (2014) -
Determination of gold by high-resolution continuum source atomic absorption spectrometry with chemical vapor generation
by: Krawczyk,Magdalena, et al.
Published: (2013) -
Atomic absorption spectrometry.
Published: (1991) -
Determination of Cd, Ni and V in Spices by Solid Sampling High-Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry
by: Virgilio,Alex, et al.
Published: (2015) -
Determination of copper at wide range concentrations using instrumental features of high-resolution continuum source flame atomic absorption spectrometry
by: Lima,Renata Toledo, et al.
Published: (2010)