RT journal article
T1 Sensing Cd(II) Using a Disposable Optical Sensor Based on a Schiff Base Immobilisation on a Polymer-Inclusion Membrane. Applications in Water and Art Paint Samples
A1 Sánchez Ponce, Lorena
A1 Galindo Riaño, María Dolores
A1 Casanueva Marenco, María José
A1 Granado Castro, María Dolores
A1 Díaz de Alba, Margarita Isabel
A2 Química Analítica
K1 polymer-inclusion membrane
K1 Cd(II) ions determination
K1 optical sensor
K1 PVC matrix
K1 2-acetylpyridine benzoylhydrazone
AB A disposable colour-changeable optical sensor based on an interesting polymer inclusion-membrane (PIM) was designed to determine Cd(II) ions in aqueous medium. The Schiff base 2-acetylpyridine benzoylhydrazone (2-APBH) immobilised on the polymer membrane was used as a sensing molecule. The amounts of the PIM components were optimised by a 3(2) fractional factorial design with two central points and two blocks. The best optical sensor composition consisted of 2.5 g of poly(vinylchloride) (PVC) as a base polymer, 3 mL of tributyl phosphate (TBP) as a plasticiser, and 0.02 g of 2-APBH as a reagent. The sensor showed a good linear response in the range from 0.02 mg L-1 (limit of detection) to 1 mg L-1 of Cd(II) under the following experimental conditions: pH 9.5 (adjusted using ammonium chloride buffer solution at 0.337 mol L-1), 60 min of exposure time plus 2 min of sonication (pulses at 2 s intervals), and 10 min of short-term stability. The relative standard deviation of the method was determined to be 4.04% for 0.4 mg L-1 of Cd(II). The optical sensor was successfully applied to the determination of Cd(II) in natural-water and art-paint samples.
PB MDPI
SN 2073-4360
YR 2021
FD 2021-12
LK http://hdl.handle.net/10498/26416
UL http://hdl.handle.net/10498/26416
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026