Abstract
An alternative analytical procedure for cobalt determination by tungsten coil electrothermal atomic absorption spec- trophotometry (TCAAS) was developed to determine the liquid ruminal passage rate (turnover) of Co-EDTA in sheep feces. A matrix-matching procedure and a selective extraction of Co in 1.0 mol l−1 HCl were evaluated in order to correct and minimize the interference effects caused by sample matrices. As application, six sheep received at the same time one dose of the marker (Co-EDTA); thier fecal samples were collected in intervals of 6 h during 90 h. The Co amounts deter- mined in the dry sheep feces by TCAAS were compared with those obtained by a flow injection catalytic spectrophoto- metric method. The characteristic mass and the detection limit, both based on peak height absorbance, were 23.1 and 19.1 pg, respectively, for 10 ml of sample volume in the samples of sheep feces. The rsd was 0.5% for 10 consecutive injections of 20.0 mg Co l−1. The accuracy was assessed by employing the paired t-test at 95% confidence level; there was no significant difference for Co content determined by TCAAS and by flow injection spectrophotometry.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S. L. Underwood, “Trace Elements in Human and Animal Nutrition”, 4th ed., Academic Press, New York, 1977.
M. H. Poore, J. A. Moore, T. P. Eck and R. S. Swingle, J. Anim. Sci., 68, 2965 (1990).
M. H. Poore, J. A. Moore, T. P. Eck and R. S. Swingle, J. Anim. Sci., 69, 2646 (1991).
J. A. Moore, M. H. Pond and T. G. Goodwin, J. Anim. Sci., 70, 3528 (1992).
E. C. Lima, F. J. Krug, J. A. Nobrega and E. A. N. Fernandes, J. Anal. At. Spectrom., 12, 475 (1997).
M. Burguera, J. L. Burguera, C. Rondon, C. Rivas, P. Carrero, M. Gallignani and R. Brunetto, J. Anal. At. Spectrom., 10, 343 (1995).
R. Barbera and R. Farre, At. Spectrosc., 9, 6 (1988).
K. Ohta and T. Mizuno, Anal. Chim. Acta, 217, 377 (1989).
K. Kitagawa, H. Tanahashi and M. Yanagisawa, Anal. Sci., 6, 87 (1990).
J. V. Chauvin, D. G. Davis and L. G. Hargis, Anal. Lett., 25, 137 (1992).
J. A. Nobrega, M. M. Silva, P. V. Oliveira, F. J. Krug and N. Baccan, Quim. Nova, 18, 555 (1995).
M. Knochen, E. Saritsky and I. Dol, Quim. Anal., 15, 184 (1996).
H. Berndt and G. Schaldach, J. Anal. At. Spectrom., 3, 709 (1988).
E. C. Lima, F. J. Krug, J. A. Nobrega and A. R. A. Nogueira, Talanta, 47, 613 (1998).
C. G. Bruhn, J. Y. Neira, G. D. Valenguela and J. A. Nobrega, J. Anal. At. Spectrom., 13, 29 (1998).
F. J. Krug, M. M. Silva, P. V. Oliveira and J. A. Nobrega, Spectrochim. Acta, 50B, 1469 (1995).
P. J. Parsons, H. C. Qiao, K. M. Aldous, E. Mills and W. Slavin, Spectrochim. Acta, 50B, 1475 (1995).
M. Miyazawa, M. A. Pavan and M. F. M. Bloch, Commun. Soil. Sci. Plant. Anal., 15, 141 (1984).
M. A. Z. Arruda, E. A. G. Zagatto, A. O. Jacintho and S. M. Brienza, J. Braz. J. Chem. Soc. 2, 47 (1991).
M. M. Silva, R. B. Silva, F. J. Krug, J. A. Nobrega and H. Berndt, J. Anal. At. Spectrom., 9, 861 (1994).
A. R. A. Nogueira, G. B. Souza, M. A. Z. Arruda and M. Miyazawa, Anim. Feed Sci. Technol., 74, 79 (1998).
J. L. M. De Boer and F. J. M. J. Messen, Spectrochim. Acta, 38B, 739 (1983).
P. Uden, P. E. Colucci and P. J. Soest, J. Sci. Food Agric., 31, 625 (1980).
W. Slavin, D. C. Manning and G. R. Carnrick, At. Spectrosc., 2, 137 (1981).
I. Atsuya, K. Aryu and Q. Zhang, Anal. Sci., 8, 433 (1992).
W. L. Grovum and V. J. Williams, Br. J. Nutr., 30, 313 (1973).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lopes, G.S., Nogueira, A.R.A., Oliveira, P.V. et al. Determination of Cobalt in Animal Feces by Tungsten Coil Atomic Absorption Spectrophotometry. ANAL. SCI. 15, 165–171 (1999). https://doi.org/10.2116/analsci.15.165
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.2116/analsci.15.165