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Related Experiment Video

Updated: Jun 15, 2026

Dynamic Electrochemical Measurement of Chloride Ions

Dynamic Electrochemical Measurement of Chloride Ions

Published on: February 5, 2016

Automatic determination of chlorine without standard solutions using a biamperometric flow-batch analysis system.

Valberes B Nascimento¹, Thiago M G Selva, Elaine C S Coelho

¹Universidade Federal Rural de Pernambuco, Departamento de Química, 52171-030, Recife, PE, Brazil. valberes@dq.ufrpe.br

|March 2, 2010

Summary

An automated system generates standards in-line for chlorine analysis, simplifying measurements in real samples. This accurate, cost-effective method offers reliable results for routine applications.

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Area of Science:

Analytical Chemistry
Electrochemistry

Background:

Traditional methods for chlorine analysis often require standard solutions.
Developing automated, reliable, and cost-effective analytical systems is crucial for routine applications.

Purpose of the Study:

To present an automatic analysis system for determining total available chlorine.
To demonstrate the system's versatility and applicability to real-world samples.

Main Methods:

Utilized an electrochemical flow cell for in-line standard generation.
Employed the standard addition technique with biamperometric monitoring.
Optimized flow-batch parameters for sensitivity and precision.

Main Results:

Achieved excellent linear dependence between biamperometric signal and chlorine concentration.
Demonstrated good agreement with a reference method (r=0.9995).
Obtained a low limit of detection (LOD=8.261 x 10(-7) mol L(-1)) and recoveries near 100%.

Conclusions:

The developed system provides a simple, accurate, and inexpensive method for chlorine determination.
The system is highly reliable and suitable for routine applications.
The method can be extended to other oxidants and sample types.