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Please use this identifier to cite or link to this item: http://purl.org/purl/515

Title: A PVC Plasticized Membrane Sensor for Nickel Ions
Authors: Girish Kumar,K
Remalakshmy,Poduval
Sareena, John
Pearl,Augustine
Keywords: Nickel-selective sensor
PVC matrix
thiophene-derivative Schiff base
potentiometry
Issue Date: 11-May-2006
Publisher: Departmenrt of Applied Chemistry
Abstract: A new PVC membrane sensor, which is highly selective towards Ni (II) ions, has been developed using a thiophene-derivative Schiff base as the ionophore. The best performance was exhibited by the membrane having the composition percentage ratio of 5:3:61:31 (ionophore:NaTPB:DBP:PVC) (w=w), where NaTPB is the anion excluder, sodium tetraphenylborate and DBP is the plasticizing agent (dibutyl phthalate). The membrane exhibited a good Nernstian response for nickel ions over the concentration range of 1.0 10 1– 5.0 10 6M (limit of detection is 1.8 10 6 M) with a slope of 29.5 1.0mV per decade of activity. It has a fast response time of<20 s and can be used for a period of 4 months with good reproducibility. The sensor is suitable for use in aqueous solutions of a wide pH range of 3.2–7.9. The sensor shows high selectivity to nickel ions over a large number of mono-, bi- and trivalent cations. It has been successfully used as an indicator electrode in the potentiometric titration of nickel ions against EDTA and also for direct determination of nickel content in real samples – wastewater samples from electroplating industries and Indian chocolates.
URI: http://dyuthi.cusat.ac.in/purl/515
Appears in Collections:Dr. K Girish Kumar

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