Journal
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume 31, Issue 6, Pages 1699-1703Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.5012/bkcs.2010.31.6.1699
Keywords
Schiff base; Silver-ion selective electrode; Potentiometry; Ionophore; N,N '-Bis(pyridin-2-ylmethylene)benzene-1,2-diamine
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Funding
- Chonnam National University [2009]
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The Schiff base N,N'-bis(pyridin-2-ylmethylene)benzene-1,2-diamine [BPBD] has been synthesized and explored as ionophore for preparing PVC-based membrane sensors selective to the silver (Ag+) ion. Potentiometric investigations indicate high affinity of this receptor for silver ion. The best performance was shown by the membrane of composition (w/w) of ionophore: 1 mg, PVC: 33 mg, o-NPOE: 66 mg and additive were added 50 mol % relative to the ionophore in 1 mL THF. The sensor works well over a wide concentration range 1 x 10(-3) to 1.0 x 10(-7) M by pH 6 at room temperature (slope 58.6 mV/dec.) with a response time of 10 seconds and showed good selectivity to silver ion over a number of cations. It could be used successfully for the determination of silver ion content in environmental and waste water samples.
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