Uma celula eletroquimica de fluxo para modificacao permanente de tubo de grafite empregado em absorcao atomica



Document title: Uma celula eletroquimica de fluxo para modificacao permanente de tubo de grafite empregado em absorcao atomica
Journal: Quimica nova
Database: PERIÓDICA
System number: 000196324
ISSN: 0100-4042
Authors: 1


Institutions: 1Universidade Presbiteriana Mackenzie, Faculdade de Ciencias Biologicas, Exatas e Experimentais, Sao Paulo. Brasil
Year:
Season: May-Jun
Volumen: 24
Number: 3
Pages: 404-407
Country: Brasil
Language: Portugués
Document type: Artículo
Approach: Experimental
English abstract A flow cell assembled on the original geometry of a graphite tube to achieve permanent chemical modifier is proposed. The graphite tube operates as the working electrode. A stainless steel tube, positioned downstream from the working electrode, was used as the auxiliary electrode. The potential value applied on the graphite electrode was measured against a micro reference electrode (Ag/AgCl) inserted into the auxiliary electrode. Palladium solutions in acetate buffer (100 mmol L-1, pH = 4.8), flowing at 0.5 mL min-1 for 60 min was used to perform the electrochemical modification. A mercury solution (1 ng) was used to evaluate the performance of the permanent palladium modifier
Disciplines: Química
Keyword: Química analítica,
Electroquímica,
Celdas electroquímicas,
Grafito,
Absorción atómica,
Modificador permanente
Keyword: Chemistry,
Analytical chemistry,
Electrochemical,
Electrochemical cell,
Graphite,
Atomic absorption,
Permanent modifier
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