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 Zn2+ in a wide concentration range (from 2.06 ppm to 6.54 × 103 ppm) with a slope of 22.0 mV/decade of Zn2+ concentration. The response time of the sensor is 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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