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Sensor for Silver(I) Ion Based on Schiff-base-p-tertbutylcalixarene
Department of chemistry, Guru Nanak Dev University, Amritsar 143005, India
* Author to whom correspondence should be addressed.
Received: 16 September 2002 / Accepted: 1 October 2002 / Published: 18 October 2002
(This article belongs to the Special Issue Ion Sensors
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 calixarene 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 calixarene 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 Ag(I) in the natural water spiked with silver with this electrode assembly.
Keywords: Sensor; Silver(I); Potentiometry
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Cite This Article
MDPI and ACS Style
Mahajan, R.K.; Kaur, I.; Sharma, V.; Kumar, M. Sensor for Silver(I) Ion Based on Schiff-base-p-tertbutylcalixarene. Sensors 2002, 2, 417-423.
Mahajan RK, Kaur I, Sharma V, Kumar M. Sensor for Silver(I) Ion Based on Schiff-base-p-tertbutylcalixarene. Sensors. 2002; 2(10):417-423.
Mahajan, R. K.; Kaur, Inderpreet; Sharma, V.; Kumar, M. 2002. "Sensor for Silver(I) Ion Based on Schiff-base-p-tertbutylcalixarene." Sensors 2, no. 10: 417-423.