PVC-Based 2,2,2-Cryptand Sensor for Zinc Ions |
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Authors: | Srivastava S K Gupta V K Jain S |
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Affiliation: | Department of Chemistry, University of Roorkee, Roorkee-247 667 (U.P.), India. |
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Abstract: | A PVC-based membrane of 2,2,2-cryptand exhibits a very good response for Zn(2+) in a wide concentration range (from 2.06 ppm to 6.54 × 10(3) ppm) with a slope of 22.0 mV/decade of Zn(2+) concentration. The response time of the sensor is <10 s, and the membrane can be used for more than 3 months without any observed divergence in potentials. The proposed sensor exhibits very good selectivity for Zn(2+) over other cations and can be used in a wide pH range (2.8-7.0). It has also been possible to use this assembly as an indicator electrode in potentiometric titrations involving zinc ions. |
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