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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Potentialities of thermospray fame furnace atomic absorption spectrometry (TS-FF-AAS) in the fast sequential determination of Cd, Cu, Pb and Zn

Full text
Author(s):
Miranda, Kelber [1] ; Pereira-Filho, Edenir Rodrigues [1]
Total Authors: 2
Affiliation:
[1] Univ Fed Sao Carlos, Ctr Ciencias Exatas & Tecnol, Dept Quim, Grp Anal Instrumental Aplicada, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ANALYTICAL METHODS; v. 1, n. 3, p. 215-219, DEC 2009.
Web of Science Citations: 13
Abstract

In this study, the combination of thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) and fast sequential flame atomic absorption spectrometry (FS-FAAS) for the sequential determination of Cd, Cu, Pb and Zn is presented and a significant improvement in the analytical throughput of TS-FF-AAS is obtained. Ni tubes of different designs were evaluated observing the necessary read delay to obtain maximum absorbance and avoid memory effects. All experiments were performed in a flame atomic absorption spectrometer working in fast sequential mode fitted with a deuterium background corrector. The fast sequential TS-FF-AAS system has been optimized for Cd, Cu, Pb and Zn whereby it was found that a Ni tube with an internal diameter of 8 mm with 10 holes on the bottom side combined with a ceramic capillary of 0.5 mm internal diameter and a delay time of 60 seconds gave the best results (adequate absorbance values and no memory effects). After 60 seconds read delay, Cd, Cu, Pb and Zn could be determined in 12 seconds (3 seconds each element). Limits of detection obtained for Cd, Cu, Pb and Zn were 0.3, 7.5, 4.4 and 0.3 mu g L(-1), respectively. (AU)

FAPESP's process: 07/04515-4 - Combination of atomic absorption spectrometry with sequential determination and thermospray flame furnace atomic absorption spectrometry
Grantee:Edenir Rodrigues Pereira Filho
Support Opportunities: Regular Research Grants
FAPESP's process: 09/01447-3 - Use of calibration strategies for fast sequential multi-element determination of Cd, Cu, Pb and Zn in biological and food samples using thermospray flame furnace atomic absorption spectrometry
Grantee:Kelber dos Anjos de Miranda
Support Opportunities: Scholarships in Brazil - Doctorate