Sensor for SilverI Ion Based on Schiff-base-p-tertbutylcalix4areneReportar como inadecuado

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Department of chemistry, Guru Nanak Dev University, Amritsar 143005, India


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Abstract The preparation of polymer membrane selective to silver ion and its application to ion-selective electrode is reported here. PVC membrane contain silver-selective calix4arene derivative as ionophore. The membrane electrode is highly selective to silver ion and exhibit good linear response over a wide concentration range of 1.0×10-1 to 1.0×10-5M AgNO3 with Nernstian slope of 58.9 mV per decade. The detection limit of electrode is 6.31×10-6 M .The calix4arene based membrane electrode exhibit enhanced selectivities for silver ion over other cations; log KPotAg,Na = -2.35, log KPotAg,K= -2.65, log KPotAg,Mg = -4.57, log KPotAg,Ba = -4.10, log KPotAg,Cd = -3.42, log KPotAg,Pb = -3.45.Even the strongest interferent Hg2+ do not interfere to great extent, log KPotAg,Hg = -2.0.The electrode response is stable over wide pH range of 1.0-6.0. The response time of the sensor is 30 seconds and the membrane can be used for more than 6 months without observing any divergence. The sensor can also be applied as an indicator electrode for potentiometric titration of Ag+ ions with Cl-. It is possible to determine AgI in the natural water spiked with silver with this electrode assembly. View Full-Text

Keywords: Sensor; SilverI; Potentiometry Sensor; SilverI; Potentiometry

Autor: R. K. Mahajan * , Inderpreet Kaur, V. Sharma and M. Kumar



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