Spectrophotometric sensor system based on a liquid waveguide capillary cell for the determination of titanium: Application to natural waters, sunscreens and a lake sediment

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Ricardo N.M.J. Páscoa (Autor) Outra; Ildikó V. Tóth (Autor) Outra; Agostinho Almeida (Autor) FFUP; António O.S.S. Rangel (Autor) Outra

Revista

Título: Sensors and Actuators, B: Chemical

Vol. 157 Nº 1

Páginas: 51-56

ISSN: 0925-4005

Editora: Elsevier

Indexação

ISI Web of Knowledge - 18 Citações

ISI Web of Science

Scopus - 18 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Ciências da saúde

CORDIS: Ciências Físicas > Química > Química analítica

Outras Informações

ID Authenticus: P-002-MGY

Resumo (PT): An analytical procedure for the spectrophotometric determination of titanium at trace levels was developed. The procedure involves the use of a multi-pumping flow system (MPFS) coupled with a liquid waveguide capillary cell (LWCC) with 1.0 m path length, 550 μm i.d. and 250 μL internal volume, which enabled to enhance the sensitivity of the determination and thus avoid complex and time-consuming pre-concentration steps. The determination is based on the colorimetric reaction of titanium with chromotropic acid. The limit of detection (3σ) was 0.4 μg/L and a linear response up to 100 μg/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. <br> <br> Keywords: Titanium; Multi-pumping flow system; Liquid waveguide capillary cell; Spectrophotometry; Trace analysis <br> <a target="_blank" href=" http://www.sciencedirect.com/science/article/pii/S0925400511002218"> Texto integral </a> <br> <br>

Abstract (EN): An analytical procedure for the spectrophotometric determination of titanium at trace levels was developed. The procedure involves the use of a multi-pumping flow system (MPFS) coupled with a liquid waveguide capillary cell (LWCC) with 1.0 m path length, 550 μm i.d. and 250 μL internal volume, which enabled to enhance the sensitivity of the determination and thus avoid complex and time-consuming pre-concentration steps. The determination is based on the colorimetric reaction of titanium with chromotropic acid. The limit of detection (3σ) was 0.4 μg/L and a linear response up to 100 μg/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. <br> <br> Keywords: Titanium; Multi-pumping flow system; Liquid waveguide capillary cell; Spectrophotometry; Trace analysis <br> <a target="_blank" href="http://www.sciencedirect.com/science/article/pii/S0925400511002218 "> Full text</a> <br> <br>

Idioma: Inglês

Tipo (Avaliação Docente): Científica