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Química Nova

versión impresa ISSN 0100-4042versión On-line ISSN 1678-7064


OLIVEIRA, Paulo C. C. de; GOUVEIA, Vitor J. P.  y  MASINI, Jorge C.. Construction and application of a thin layer spectrophotometric cell for flow analysis. Quím. Nova [online]. 2001, vol.24, n.3, pp.399-403. ISSN 0100-4042.

A low cost spectrophotometric cell for use in flow analysis was manufactured in acrylic and adapted to a commercial spectrophotometer. The application of this cell was performed in the determination of chromium (VI) in steel samples using the reaction with the alkaloid brucine in presence of oxalic acid and 0.6 mol L-1 sulfuric acid. The cell allows an enlarged analytical range, diminishing the extension of dilutions, which is useful for on-line monitoring of industrial processes.

Palabras clave : thin layer cell; spectrophotometric Cr(VI) determination; steel samples.

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