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 Pascoa (Autor) Outra; Ildiko V Toth (Autor) Outra; Antonio 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

Scopus - 18 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-002-MGY

DOI: 10.1016/j.snb.2011.03.025

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 mu m i.d. and 250 mu L 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 calorimetric reaction of titanium with chromotropic acid. The limit of detection (3 sigma) was 0.4 mu g/L and a linear response up to 100 mu.g/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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6