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Química Nova

Print version ISSN 0100-4042


VICENTINI, Fernando Campanhã et al. Factorial design and response surface: voltammetric method optimization for the determination of ag(i) employing a carbon nanotubes paste electrode. Quím. Nova [online]. 2011, vol.34, n.5, pp.825-830. ISSN 0100-4042.

A factorial design applied in a voltammetric stripping method for the measurement of Ag(I) in natural water is described. The procedure is based on the effective pre-concentration of silver ions on electrode surface. The calibration graph was linear in the silver concentration range from 7.92 x 10"7 to 1.07 x 10"5 mol L"1 with a detection limit of 3.81 x 10-7 mol L-1. The determination of Ag(I) in natural water samples was carried out satisfactory with the proposed electrode.

Keywords : carbon nanotubes; factorial design; silver(I).

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