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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

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The chalcocite copper membrane electrode.

A Hulanicki¹, M Trojanowicz, M Cichy

¹Institute of Fundamental Problems in Chemistry, University, Warsaw, Poland.

|January 1, 1976

Summary

This summary is machine-generated.

A synthetic chalcocite (Cu2S) electrode selectively detects copper(I) ions in solution. This membrane electrode is effective for copper titrations, showing high accuracy in various complexing conditions.

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Area of Science:

Electrochemistry
Materials Science
Analytical Chemistry

Background:

Development of ion-selective electrodes (ISEs) is crucial for accurate chemical analysis.
Chalcocite (Cu2S) based electrodes offer potential for copper ion detection.
Understanding copper speciation in solution is vital for various applications.

Purpose of the Study:

To investigate the performance of a synthetic chalcocite (Cu2S) single crystal membrane electrode.
To evaluate the electrode's selectivity for copper(I) ions over copper(II) ions.
To assess the electrode's applicability in complexometric titrations of copper.

Main Methods:

Fabrication and characterization of a Cu2S single crystal membrane electrode.
Determination of experimental selectivity coefficients.
Calibration using metal-ion buffers with TETREN (1,4,8,11-tetraazacyclotetradecane).
Application in potentiometric titrations with EDTA and TETREN.
Comparison with theoretical titration curves generated by HALTAFALL software.

Main Results:

The Cu2S electrode exhibits primary response to copper(I) ion activity.
Experimental selectivity coefficients align with theoretical calculations based on solubility products.
The electrode functions effectively as an indicator in copper titrations with TETREN and EDTA.
Good agreement between experimental and calculated titration curves for TETREN, with discrepancies for EDTA attributed to Cu(I) complexation.
Accurate titrations with errors below 1% were achieved.

Conclusions:

The synthetic chalcocite (Cu2S) electrode is a reliable sensor for copper(I) ions.
Its performance in complexometric titrations is validated, particularly with strongly complexing ligands like TETREN.
The study highlights the importance of considering copper speciation in EDTA titrations.
The electrode demonstrates practical utility in quantitative copper analysis.