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Determination of Cadmium in Seawater by Cathodic Stripping Voltammetry of Complexes with 5‐Fluorouracil
Author(s) -
Khodari M.
Publication year - 1998
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/(sici)1521-4109(199810)10:15<1061::aid-elan1061>3.0.co;2-2
Subject(s) - cadmium , cathodic stripping voltammetry , seawater , chemistry , hanging mercury drop electrode , supporting electrolyte , detection limit , linear sweep voltammetry , voltammetry , analytical chemistry (journal) , anodic stripping voltammetry , cathodic protection , mercury (programming language) , aqueous solution , inorganic chemistry , ion , metal ions in aqueous solution , electrolyte , electrode , cyclic voltammetry , electrochemistry , chromatography , oceanography , organic chemistry , computer science , programming language , geology
A reduction current is obtained when an aqueous solution of cadmium and 5‐fluorouracil (5‐FU) is subjected to linear sweep cathodic stripping voltammetry. This current is attributed to the reduction of cadmium‐5‐FU complex ions which adsorbed onto the hanging mercury drop electrode. The resulting peak current is characterized with respect to supporting electrolytes, pH, accumulation potential, scan rate, possible interferences and other variables. A linear relationship between the peak current and cadmium concentration was obtained over the range 5 × 10 −9 –1 × 10 −7 mol dm −3 with correlation coefficient of 0.9973. A detection limit of 9.0 × 10 −11 mol dm −3 was obtained with standard deviation of 1.9 %. The method was successffuly applied for the determination of cadmium in seawater.