Un metodo de bajo costo para la determinacion de cobre a nivel de vestigios en matrices de interes ambiental

PELLERANO, R. G., ROMERO, C. H., ACEVEDO, H. A., VÁZQUEZ, F. A.

QUíMICA NOVA

Sociedade Brasileira de Química (SBQ)

Año: 2007 vol. 30 p. 2020 - 2024

0100-4042

A determination method of copper by Solid Phase Spectrophotometry (SPS) was optimized with Dohelert design. Copper(II) was sorbed on a styrene-divinylbenzene anion-exchange resin as a Cu(II)-1-(2-pyridylazo)-2-naphtol (PAN) complex, at pH 7.0. Resin phase absorbances at 560 nm and 800 nm are measured directly. The detection limit was found to be 2.5 µg L-1. The relative standard deviation on ten replicate determinations of 10 µg Cu(II) in 1000 mL sample was of 1.1%. The linear range of the determination was 5.0-100 ìg L-1. The method was applied to the determination of Cu(II) in natural water and vegetable samples successfully.