Highly Sensitive Determination of Cadmium and Lead Using a Low-cost Electrochemical Flow-through Cell Based on a Carbon Paste Electrode

A low-cost thin-layer electrochemical flow-through cell based on a carbon paste electrode (CPE), was constructed for the highly sensitive determination of cadmium(II) (Cd2+) and lead(II) (Pb2+) ions. The sensitivity of the proposed cell for Cd2+ and Pb2+ ion detection was improved by using the small...

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Bibliographic Details
Published in:Analytical Sciences 2012/02/10, Vol.28(2), pp.141-141
Main Authors: WONSAWAT, Wanida, DUNGCHAI, Wijitar, MOTOMIZU, Shoji, CHUANUWATANAKUL, Suchada, CHAILAPAKUL, Orawon
Format: Article
Language:English
Subjects:
Acceptability
Analytical Chemistry
Bismuth - chemistry
Cadmium
Cadmium - analysis
Cadmium - chemistry
Carbon
Carbon - chemistry
Channels
Chemistry
Drinking Water - chemistry
Electric Conductivity
Electrochemistry - economics
Electrochemistry - instrumentation
Electrochemistry - methods
Electrodes
Lead - analysis
Lead - chemistry
Mathematical analysis
Monitoring
Ointments
Pastes
Surface Properties
Time Factors
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
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Summary:A low-cost thin-layer electrochemical flow-through cell based on a carbon paste electrode (CPE), was constructed for the highly sensitive determination of cadmium(II) (Cd2+) and lead(II) (Pb2+) ions. The sensitivity of the proposed cell for Cd2+ and Pb2+ ion detection was improved by using the smallest channel height without the need for any complicated electrode modification. Under the optimum conditions, the detection limits of Cd2+ and Pb2+ ions (0.08 and 0.07 μg dm−3, respectively) were 13.8- and 11.4-fold lower than that of a commercial flow cell (1.1 and 0.8 μg dm−3, respectively). Moreover, the percentage recoveries of Cd2+ and Pb2+ for the in-house designed thin-layer flow cell were higher than those for the commercially available cell in all tested water samples, and within the acceptable range. The proposed flow cell is promising as an inexpensive and alternative one for the highly sensitive monitoring of heavy metal ions.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.28.141