In situ bismuth-film electrode for square-wave anodic stripping voltammetric determination of tin in biodiesel
作者： Morgana Frena , Iolana Campestrini , Otoniel C. de Braga , Almir Spinelli
DOI: 10.1016/J.ELECTACTA.2011.02.111
关键词:
摘要: Abstract A bismuth-film electrode (BiFE) was applied in square-wave anodic stripping voltammetry (SWASV) order to determine Sn (IV) biodiesel samples. In situ simultaneous deposition of tin and bismuth at −1.2 V for 90 s carried out a supporting electrolyte containing 0.1 mol L −1 acetate buffer (pH 4.5) 1.73 mmol L caffeic acid as the complexing agent. single well-defined peak observed −0.58 V oxidation (II), which used analytical signal. The calibration curve obtained concentration range 0.17–7.83 μmol L with detection limit being 0.14 μmol L ( r = 0.9990). Repeatability reproducibility measurement current were characterized by relative standard deviations 3.6% 4.1%, respectively, 5.0 μmol L solution n = 10). method validated comparing results those provided application atomic absorption spectroscopy technique.
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