Title of article :
Anodic stripping voltammetric determination of bismuth(III) using a Tosflex-coated mercury film electrode
Author/Authors :
Yang، نويسنده , , Hao-Yun and Chen، نويسنده , , Wen-Yin and Sun، نويسنده , , I-Wen، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 1999
Pages :
8
From page :
977
To page :
984
Abstract :
A Tosflex–mercury film electrode (TMFE) was prepared by spin-coating a solution of the perfluorinated anion exchange polymer Tosflex onto a glassy carbon electrode surface followed by electrodeposition of mercury film on this electrode. This electrode was used for the determination of trace bismuth(III) which was preconcentrated onto the TMFE as anionic bismuth(III) complexes with chloride in a chloride medium. The preconcentration was carried out at a potential of−0.2 V, and the preconcentration of the bismuth(III) was enhanced significantly by the anion-exchange feature of Tosflex. The accumulated bismuth(III) was then determined by anodic square-wave stripping voltammetry (SWSV). Various parameters influencing the determination of bismuth(III) were examined in detail. With 2 min accumulation, the analytical signal versus concentration dependence was linear up to 50 ppb, and the detection limit was 0.58 ppb. This modified electrode showed good resistance to the interferences from surface-active compounds and common ions.
Keywords :
Electroanalysis , Tosflex , Bismuth , Stripping voltammetry
Journal title :
Talanta
Serial Year :
1999
Journal title :
Talanta
Record number :
1639615
Link To Document :
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