The quality of our drinking water: Aluminium determination with an acoustic wave sensor
authors Verissimo, MIS; Gomes, MTSR
journal ANALYTICA CHIMICA ACTA
author keywords bulk acoustic wave sensor; aluminium; drinking water
keywords COMPLEXING RESIN; CHELATING RESINS; UV-IRRADIATION; METAL-IONS; PRECONCENTRATION; SPECTROMETRY; SPECIATION; INJECTION; COLUMN; BRAIN
abstract A new methodology based on an inexpensive aluminium acoustic wave sensor is presented. Although the aluminium sensor has already been reported, and the composition of the selective membrane is known, the low detection limits required for the analysis of drinking water, demanded the inclusion of a preconcentration stage, as well as an optimization of the sensor. The necessary coating amount was established, as well as the best preconcentration protocol, in terms of oxidation of organic matter and aluminium elution. from the Chelex-100. The methodology developed with the acoustic wave sensor allowed aluminium quantitation above 0.07 mg L(-1). Several water samples from Portugal were analysed using the acoustic wave sensor, as well as by UV-vis spectrophotometry. Results obtained with both methodologies were not statistically different (alpha = 0.05), both in terms of accuracy and precision. This new methodology proved to be adequate for aluminium quantitation in drinking water and showed to be faster and less reagent consuming than the UV spectrophotometric methodology. (C) 2008 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0003-2670
year published 2008
volume 617
issue 01-fev
beginning page 162
ending page 166
digital object identifier (doi) 10.1016/j.aca.2007.12.034
web of science category Chemistry, Analytical
subject category Chemistry
unique article identifier WOS:000256601000020
link http://dx.doi.org/10.1016/j.aca.2007.12.034
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