INQUIMAE 12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Cu2+ ion-sensitive surface on graphite electrodes
Autor/es:
MÉNDEZ DE LEO, LUCILA PAULA; PEDRE, IGNACIO; GONZÁLEZ, GRACIELA ALICIA
Revista:
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Editorial:
SPRINGER HEIDELBERG
Referencias:
Año: 2019
ISSN:
1618-2642
Resumen:
A new electrochemical interface based on polyacrylic acid (PAAcid) immobilized in a Nafion® polymeric matrix on graphite screen-printed electrodes for detecting copper is presented. The copper is retained in the surface due to the capacity of the polyacid to chelate metals, and quantified using square wave voltammetry. The response was characterized by spectroscopic techniques (UV-vis-IR), which confirmed the chelation from the Cu2+ ions by the acid. A calibration curve is presented, showing good linearity and repeatability and its usefulness as a sensor. The range of operation goes from 15 to 50 μM, with a detection limit of 12 μM, making the sensor useful for measurements in environmental samples (after a preconcentration step) and in drinking water.
