title: PVC-Based 2,2,2-Cryptand Sensor for Zinc Ions.
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.
authors: Department of Chemistry, University of Roorkee, Roorkee-247 667 (U.P.), India.
authors: S K
authors: SK
authors: Srivastava
authors: V K
authors: VK
authors: Gupta
authors: S
authors: S
authors: Jain