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Accumulation and Analysis of Cuprous Ions in a Copper Sulfate Plating Solution

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Published on: March 20, 2019

Spectrophotometric determination of Cu(II) with sequential injection analysis.

J F van Staden¹, A Botha

¹Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa.

|October 31, 2008

Summary

A new sequential injection system simplifies copper(II) determination in food and water. This method eliminates extraction, offering a faster, computerized analysis with high accuracy for copper(II) detection.

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Area of Science:

Analytical Chemistry
Environmental Science

Background:

Copper(II) (Cu(II)) analysis is crucial for food and water quality assessment.
Traditional methods often involve complex extraction steps, increasing analysis time and potential for error.

Purpose of the Study:

To develop a streamlined, sequential injection system for Cu(II) determination.
To eliminate the need for a separate extraction procedure in Cu(II) analysis.
To provide a rapid and accurate method for Cu(II) quantification in diverse sample matrices.

Main Methods:

A sequential injection system utilizing the reaction between Cu(II) and diethyldithiocarbamate (DDTC).
Spectrophotometric detection of the Cu(II)-DDTC complex in aqueous solution at 460 nm.
Optimization of physical and chemical parameters for enhanced system performance.
Implementation of multiple flow reversals to mitigate interferences and improve masking agent efficacy.

Main Results:

The developed system successfully determined Cu(II) without prior extraction.
The computerized system achieved a sample throughput of seven samples per hour with a relative standard deviation below 4.50%.
A linear calibration curve was obtained for Cu(II) concentrations from 0.5-5.0 mg/l, with a detection limit of 0.2 mg/l.

Conclusions:

The sequential injection system offers a simplified and efficient approach for Cu(II) determination.
The method is suitable for routine analysis of Cu(II) in plant food and water samples.
The system demonstrates robustness against interferences, enhancing its practical applicability.