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

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Ricardo N M J Pascoa (Author) Other; Ildiko V Toth (Author) Other; Antonio O S S Rangel (Author) Other

Journal

Title: Sensors and Actuators, B: Chemical

Vol. 157 No. 1

Pages: 51-56

ISSN: 0925-4005

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 18 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6