Characterisation of spectral interferences in background correction for arsenic, selenium and antimony in electrothermal atomic absorption spectrometry

1988 ◽  
Vol 3 (7) ◽  
pp. 1013 ◽  
Author(s):  
Ivar Martinsen ◽  
Bernard Radziuk ◽  
Yngvar Thomassen
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Background Correction ◽  
Spectral Interferences

Elimination of matrix and spectral interferences in the measurement of lead and cadmium in urine and blood by electrothermal atomic absorption spectrometry with deuterium background correction

1991 ◽  
Vol 37 (9) ◽  
pp. 1583-1588 ◽  
Author(s):  
P C D'Haese ◽  
L V Lamberts ◽  
L Liang ◽  
F L Van de Vyver ◽  
M E De Broe
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Detection Limits ◽  
Absorption Spectrometry ◽  
Ammonium Molybdate ◽  
Blood Analysis ◽  
Background Correction ◽  
Spectral Interferences ◽  
Lead And Cadmium

Abstract Direct measurement of lead and cadmium in blood and urine by electrothermal atomic absorption spectrometry with deuterium background correction (D2-AAS) is prone to severe matrix and spectral interferences. We overcame these effects by coating the L'vov platform with ammonium molybdate, reducing the atomization time, introducing a post-atomization cooling step, carefully selecting ashing and atomization temperatures, and using an appropriate procedure for matrix modification. To determine Pb and Cd in blood and urine, we used matrix-matched calibration curves. With the proposed procedure for sample preparation, both Pb and Cd in whole blood can be determined in the same diluted sample. Results obtained by D2-AAS correlate closely with those by Zeeman-corrected AAS. Detection limits (mean blank + 3 SDblank) for Pb in urine and blood were 4 micrograms/L. For cadmium, the detection limits were 0.4 and 0.1 micrograms/L for urine and blood analysis, respectively. Between-run CVs were less than 5.0%.

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