Premium
Highly Sensitive and Selective Measurement of Bismuth in Seawater and Drug with 1,2‐Phenylenedioxydiacetic Acid by Cathodic Adsorptive Stripping Voltammetry
Author(s) -
Gholivand M. B.,
Romiani A. A.
Publication year - 2006
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.200503434
Subject(s) - bismuth , chemistry , hanging mercury drop electrode , cathodic stripping voltammetry , stripping (fiber) , seawater , nitric acid , selectivity , inorganic chemistry , adsorptive stripping voltammetry , detection limit , voltammetry , electrode , mercury (programming language) , nuclear chemistry , electrochemistry , chromatography , materials science , organic chemistry , catalysis , oceanography , composite material , computer science , programming language , geology
A new method is presented for determination of bismuth based on cathodic adsorptive stripping of complex bismuth with 1,2‐phenylenedioxydiacetic acid (PDA) at a hanging mercury drop electrode (HMDE). The effect of various parameters such as pH, concentration of ligand, accumulation potential and accumulation time on the selectivity and sensitivity were studied. The optimum conditions for determination of bismuth include nitric acid concentration 0.01 M, 8.0×10 −4 M PDA and accumulation time 120 s, accumulation potential of −200 mV. The limits of detection are 0.25 and 0.05 nM, and responses are linear 1–1000 and 0.1–400 nM at t acc of 60 and 120 s, respectively. Many common anions and cations do not interfere in the determination of bismuth. The method was applied to the determination of bismuth in some real samples such as sea – and spring water and drug.