Determination of Cobalt in Animal Feces by Tungsten Coil Atomic Absorption Spectrophotometry.
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- LOPES Gisele S.
- Departamento de Química, Universidade Federal de São Carlos
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- NOGUEIRA Ana Rita A.
- Centro de Pesquisa de Pecuária do Sudeste, Empresa Brasileira de Pesquisa Agropecuária
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- OLIVEIRA Pedro V.
- Departamento de Química, Universidade Federal de São Carlos
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- NÓBREGA Joaquim A.
- Departamento de Química, Universidade Federal de São Carlos
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Abstract
An alternative analytical procedure for cobalt determination by tungsten coil electrothermal atomic absorption spectrophotometry (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 determined in the dry sheep feces by TCAAS were compared with those obtained by a flow injection catalytic spectrophotometric 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.
Journal
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- Analytical Sciences
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Analytical Sciences 15 (2), 165-171, 1999
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679231387904
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- NII Article ID
- 10002418741
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DyaK1MXhslansLY%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 4648420
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- Web Site
- https://ndlsearch.ndl.go.jp/books/R000000004-I4648420
- https://link.springer.com/content/pdf/10.2116/analsci.15.165.pdf
- https://link.springer.com/article/10.2116/analsci.15.165/fulltext.html
- http://www.jstage.jst.go.jp/article/analsci/15/2/15_2_165/_pdf
- https://search.jamas.or.jp/link/ui/1999133549
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
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- CiNii Articles
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- Abstract License Flag
- Disallowed