Details

Autor(en) / Beteiligte

• Doménech-Carbó, A
• Doménech-Carbó, M. T
• Gimeno-Adelantado, J. V
• Bosch-Reig, F

Titel

H-point standard addition method applied to solid-state stripping voltammetry: quantitation of lead and tin in archaeological glazes

Ist Teil von

• Analytical and bioanalytical chemistry, 2006-08, Vol.385 (8), p.1552-1561

Ort / Verlag

Germany: Berlin/Heidelberg : Springer-Verlag

Erscheinungsjahr

2006

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A solid-state electrochemical application of the H-point standard addition method to the quantification of two depositable metals A and B, which produce strongly overlapped stripping peaks, is described. The method is based on the mechanical transference of mixtures of the solid sample plus a selected compound, of a reference depositable metal R, and of known amounts of a reference material containing A or B, to paraffin-impregnated graphite electrodes. After a reductive deposition step, voltammograms recorded for those modified electrodes immersed into a suitable electrolyte produce stripping peaks for the oxidation of all of the metals deposited. Measurement of the currents at selected potentials in overlapping peaks corresponding to the stripping of A and B permits the quantitation of these metals in the solid sample, while avoiding matrix effects. The method was applied to the simultaneous determination of Pb and Sn in archaeological glazes using PbCO₃ and SnO₂ as standards and ZnO as a reference material. [graphic removed]