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Related Experiment Video

Updated: Jun 28, 2026

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

Strontium(II)-selective electrode based on a macrocyclic tetraamide.

A K Singh¹, Puja Saxena, Sameena Mehtab

¹Department of Chemistry, Indian Institute of Technology, Roorkee, India. akscyfcy@iitr.ernet.in

|October 31, 2008

Summary

A novel PVC membrane electrode was developed for selective strontium ion detection. This new sensor offers a wide detection range, fast response, and excellent selectivity for strontium(II) over other metal ions.

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Area of Science:

Analytical Chemistry
Electrochemistry
Materials Science

Background:

Development of selective ion-sensing electrodes is crucial for accurate chemical analysis.
Strontium ion detection is important in various environmental and biological applications.
Limitations exist in current methods for selective and sensitive strontium detection.

Purpose of the Study:

To fabricate and characterize a novel PVC membrane electrode for selective Sr(2+) detection.
To evaluate the electrode's performance, including response range, selectivity, and stability.
To assess the electrode's applicability in potentiometric titrations.

Main Methods:

Fabrication of a PVC membrane electrode using 5,7,12,14-dibenzo-2,3,9,10-tetraoxa-1,4,8,11-tetraazacyclotetradecane as the ion carrier.
Optimization of membrane composition (ion carrier: solvent mediator: lipophilic additive: PVC).
Electrochemical characterization including Nernstian response, detection limit, response time, and selectivity studies.

Main Results:

The optimized electrode (8:200:4:120 ratio) showed a Nernstian response for Sr(2+) from 3.98 x 10(-6) to 1.0 x 10(-1)M.
A detection limit of 2.82 x 10(-6)M and a slope of 29.0+/-0.1 mV/decade were achieved.
The electrode demonstrated excellent selectivity for Sr(2+) over various other metal ions, a response time <10s, and stability for over 3 months.

Conclusions:

The developed PVC membrane electrode offers a highly selective and sensitive method for Sr(2+) determination.
The electrode exhibits robust performance across a wide concentration range and pH, with good tolerance to non-aqueous content.
The electrode is suitable for use as an indicator in potentiometric titrations, showcasing its practical utility.