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Sensitive Determination of Trace Pb 2+ in Seawater Using Columnar Glassy Carbon Electrode
Author(s) -
Zhang Xuzhi,
Ma Shaosai,
Cui Zhengguo,
Chen Jufa,
Cui Yi,
Zhao Jun,
Feng Xiaohua
Publication year - 2011
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201190106
Subject(s) - seawater , chemistry , detection limit , electrode , supporting electrolyte , electrochemistry , glassy carbon , mercury (programming language) , anodic stripping voltammetry , stripping (fiber) , analytical chemistry (journal) , trace amounts , electrolyte , working electrode , carbon fibers , chromatography , cyclic voltammetry , materials science , composite material , oceanography , medicine , alternative medicine , pathology , composite number , computer science , programming language , geology
We herein report a mercury‐free approach for the sensitive determination of trace Pb 2+ in seawater using differential pulse stripping voltammetric (DPSV) method with a novel columnar glassy carbon electrode (CGCE). Compared with the conventional disk glassy carbon electrode with the same diameter, it has much larger electrochemical area (0.627 ± 0.003 cm 2 ). The CGCE shows good accumulation ability and consequently acceptable behavior which makes it suitable as a working electrode in the DPSV determination of Pb2+ with the great advantage of the avoidance of harmful mercury. Using acidified artificial seawater as supporting electrolyte, there was a good linear relationship between the peak currents and the concentration of Pb 2+ in the range of 0.6∼140.0 μg L ‐1 with a detection limit of 0.3 μg/L (S/N = 3) when the accumulation time was 300 s. The method was employed to determine trace levels of Pb 2+ in real seawater samples successfully.