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Orientador(es)
Resumo(s)
An analytical procedure for the spectrophotometric determination of titanium at trace levels was developed.
The procedure involves the use of a multipumping
flow system (MPFS) coupled with a liquid
waveguide capillary cell (LWCC) with 1.0 m path length, 550 mm i.d. and 250 mL internal volume, which
enabled to enhance the sensitivity of the determination and thus avoid complex and timeconsuming
preconcentration
steps. The determination is based on the colorimetric reaction of titanium with chromotropic
acid. The limit of detection (3 ) was 0.4 mg/L and a linear response up to 100 mg/L with a sample
throughput of 46 h−1, and a low reagent consumption/effluent production was achieved. The developed
procedure was applied to natural waters, sunscreen formulations and one certified lake sediment sample.
Descrição
Palavras-chave
Titanium Multipumping Liquid waveguide capillary cell Spectrophotometry Trace analysis
Contexto Educativo
Citação
PÁSCOA, Ricardo N.M.J....[et al] - Spectrophotometric sensor system based on a liquid waveguide capillary cell for the determination of titanium: Application to natural waters, sunscreens and a lake sediment. Sensors and Actuators B: Chemical. ISSN 0925-4005. Vol. 157 (2011), p. 51– 56
Editora
Elsevier