@misc{10498/33269,
year = {2019},
url = {http://hdl.handle.net/10498/33269},
abstract = {A disposable and miniaturised optical sensor based on colorimetric solid-phase extraction has been designed using poly(styrene-divinylbenzene) membrane disks modified with the colorimetric reagent pyridoxal salicyloylhydrazone to determine the aluminium concentration in aqueous solutions. The extraction of Al(III) ions by the reagent immobilised onto a disk allows the quantification directly on the adsorbent surface by a miniature portable reflectance spectrometer with an optical fibre at 434 nm. The optimisation of the sensing system was carried out by a fractional factorial design 33−1 considering the extraction pH, amount of ligand
immobilised onto the disk and time of immobilisation as experimental factors. The linear dynamic range of the sensor response ranged from 0.18 to 2 mg L−1 Al(III) with a detection limit of 0.18 mg L−1 (n=10), being the precision of 6.3% for 1 mg L−1 Al(III) (n=10, confidence level of 95%). The proposed method was successfully applied to the analysis of aluminium in leachates from cookware, antacids and hygienic care products, as contribution to the concern about aluminium as a known systemic toxicant at high doses.},
publisher = {Elsevier},
keywords = {aluminium},
keywords = {leachates from cookware},
keywords = {antacids},
keywords = {optical sensor},
keywords = {colorimetric solid-phase extraction},
keywords = {diffuse reflectance spectroscopy},
title = {Disposable optical sensor for Al(III) ions determination by coupled colorimetric solid-phase extraction-reflectance spectroscopy in leachates from cookware, antacids and hygienic care products},
doi = {10.1016/j.talanta.2019.06.102},
author = {Castañeda Loaiza, V. and Díaz de Alba, Margarita Isabel and Granado Castro, María Dolores and Galindo Riaño, María Dolores and Casanueva Marenco, María José},
}