RT journal article
T1 Design and optimization of a single-use optical sensor based on a polymer inclusion membrane for zinc determination in drinks, food supplement and foot health care products
A1 Casanueva Marenco, María José
A1 Díaz de Alba, Margarita Isabel
A1 Herrera-Armario
A1 Herrera Armario, A.
A1 Galindo Riaño, María Dolores
A1 Granado Castro, María Dolores
K1 Zn(II) ions determination
K1 optical sensor
K1 polymer inclusion membrane
K1 PVC matrix
K1 2-Acetylpyridine benzoylhydrazone
AB A single-use optical sensor was designed for Zn(II) determination based on the immobilisation of the colorimetric reagent 2-acetylpyridine benzoylhydrazone (2-APBH) in a polymer inclusion membrane (PIM) adhered on the surface of an inert rectangular strip of polyester (Mylar). Different components for the membrane preparation were tested and those resulting in membrane with good appearance, proper physical and optical properties and ease of preparation were selected. Factorial design 2^3 with three replicates of the central point was applied for the optimisation of the membrane composition. The optimal composition consisted of 2.5 g of poly(vinyl chloride) (PVC), 4 mL of tributyl phosphate (TBP) and 0.04 g of 2-APBH. The optode showed a linear dynamic range from 0.03 (detection limit) to 1 mg L−1 of Zn(II) ions with a response time of 30 min in aqueous solution at pH 6 and a relative standard deviation of 3.90% for 0.4 mg L−1 of Zn(II). The sensor exhibited good selectivity to Zn(II) over other commonly ions. It was successfully applied to the determination of Zn(II) in a water certified reference material, spiked tap water, vitamin-mineral drink, food supplement and foot health care products, as contribution to the concern about this heavy metal due to its significant role in many biological and physiological processes although toxicant at high doses.
SN 0928-4931
YR 2020
FD 2020
LK http://hdl.handle.net/10498/33270
UL http://hdl.handle.net/10498/33270
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026