Premium
Bismuth Modified Gold Microelectrode for Pb(II) Determination in Wine Using Alkaline Medium
Author(s) -
Oliveira Salles Maiara,
Ruas de Souza Ana Paula,
Naozuka Juliana,
de Oliveira Pedro Vitoriano,
Bertotti Mauro
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804575
Subject(s) - wine , detection limit , bismuth , microelectrode , analytical chemistry (journal) , chemistry , relative standard deviation , anodic stripping voltammetry , standard addition , voltammetry , linear range , calibration curve , stripping (fiber) , chromatography , materials science , electrochemistry , electrode , food science , organic chemistry , composite material
Electrodeposition of bismuth on gold microelectrodes for determination of Pb(II) by square wave anodic stripping voltammetry (SWASV) was accomplished by an in situ procedure in alkaline solution. A linear calibration plot for Pb(II) in the concentration range 40 to 6700 nmol L −1 ( r =0.998) was obtained, the detection limit was found to be 12.5 nmol L −1 ( S / N =3) and the relative standard deviation in solutions containing 1 μmol L −1 Pb(II) was 4% ( n =12). The analytical performance of the proposed sensor was tested by measuring the Pb(II) concentration in a wine sample. The result was in good agreement with the one obtained by GFAAS.