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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 8
BKCSDE 26(8)
August 20, 2005 

Lead(II)-selective Polymeric Electrode Using a Schiff Base Complex of N,N'-Bis-thiophene-2-ylmethylene-ethane-1,2-diamine as an Ion Carrier
Taejun Jeong, Dae-Cheol Jeong, Hyo Kyoung Lee, Seungwon Jeon*
Polymeric membrane, Lead ion, Ion-selective electrode, N,N'-Bis-thiophene-2-ylmethyleneethane- 1,2-diamine, Schiff base
We prepared lead ion-selective PVC membranes that were based on N,N'-bis-thiophene-2-ylmethylene-ethane- 1,2-diamine as a membrane carrier. The membrane electrode has a linear dynamic range between 1.0 × 10-5 and 1.0 × 10-1 M with a Nernstian slope of 29.79 mV per decade, and its detection limit was 2.04 × 10-6 M at room temperature. The potentiometric response is independent of the pH of the solution in the pH range of 5- 7. The proposed electrode revealed good selectivity and response for Pb2+ over a wide variety of other metal ions in pH 5.0 buffer solutions, and there was good reproducibility of the base line on the subsequent measurements. The membrane electrode has a relatively fast response time, satisfactory reproducibility and a relatively long life time.
1219 - 1224
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