Catalytic determination of cobalt by flow injection spectrophotometry: application in animal faeces analysis using hydrochloric acid as extracting solution

dc.creatorNogueira, ARA
dc.creatorSouza, GB
dc.creatorBatista, LAR
dc.creatorArruda, MAZ
dc.creatorMiyazawa, M
dc.date1998
dc.dateAUG 15
dc.date2014-12-02T16:29:02Z
dc.date2015-11-26T16:46:15Z
dc.date2014-12-02T16:29:02Z
dc.date2015-11-26T16:46:15Z
dc.date.accessioned2018-03-28T23:32:03Z
dc.date.available2018-03-28T23:32:03Z
dc.identifierAnimal Feed Science And Technology. Elsevier Science Bv, v. 74, n. 1, n. 79, n. 84, 1998.
dc.identifier0377-8401
dc.identifierWOS:000075120200007
dc.identifier10.1016/S0377-8401(98)00159-X
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78504
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78504
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78504
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274461
dc.descriptionA flow injection system for cobalt determination in faeces of bovines and equines receiving Co-EDTA as a tracer in animal nutrition studies is proposed, using 1.0 mol HCl l(-1) as extracting medium, and detection by flow injection spectrophotometric procedure based on the catalytic effect of Co(II) on the oxidation of Tiron by hydrogen peroxide. Linearity was observed up to 8.0 mu g Co l(-1), and the detection limit was 0.2 mu g Co l(-1) (3 s blank). The system requires 0.12 mg Tiron per determination and handles 65 samples h(-1). No baseline drift was observed during extended operation periods (8 h) and precise results (r.s.d.<l%) were detected. Accuracy was confirmed by running several faeces samples already analysed by flame atomic absorption spectrometry. Results related to the HCl extraction procedure were in close agreement with those obtained using the nitric-perchloric digestion (y=0.978x+0.101, R-2=0.9848), suggesting that HCl extraction and flow injection determination can be used routinely for rapid analysis of cobalt in faeces, (C) 1998 Elsevier Science B.V.
dc.description74
dc.description1
dc.description79
dc.description84
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationAnimal Feed Science And Technology
dc.relationAnim. Feed Sci. Technol.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectcobalt
dc.subjectflow injection
dc.subjectHCl extraction
dc.subjectspectrophotometry
dc.titleCatalytic determination of cobalt by flow injection spectrophotometry: application in animal faeces analysis using hydrochloric acid as extracting solution
dc.typeArtículos de revistas


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