An automated system for the measurement of hydrogen peroxide in industrial applications

Philippe Westbroek,Paul Kiekens,Filip Govaert,Edward Temmerman

doi:10.1155/s1463924698000236

Abstract

An automated sensor system for the continuous and in-line measurement of hydrogen peroxide in industrial applications is described. The hydrogen peroxide concentration can be measured over the entire pH range, over a wide concentration range of hydrogen peroxide (10-3 70 g/l), from 0 to 70°C, and with high precision and accuracy (errors less than 1% ). The system consists of a bypass in which the necessary electrodes are positioned and electronically controlled. The sensor is very selective for hydrogen peroxide, easy to instal, and it is stable for at least two months after calibration. The calibration can be done in the process solution during a running process.

Highlights

Despite the weaker oxidizing properties [1] of hydrogen peroxide when compared with chlorite [2] and hypochlorite [2], hydrogen peroxide has been the most widely used oxidizing agent for the last 20 years
This paper describes a sensor system that can measure and control the hydrogen peroxide concentration in industrial processes, making use of the amperometric principle [9] with a three-electrode potentiostatic set-up [9] equipped with a combined glass electrode and PT100 probe to measure pH and temperature
In order to evaluate the dependence of the amperometric sensor output on pH, temperature signal and hydrogen peroxide concentration, voltammetric experiments were conducted in which the values of the variable parameters were varied within a wide range

Summary

Introduction

Despite the weaker oxidizing properties [1] of hydrogen peroxide when compared with chlorite [2] and hypochlorite [2], hydrogen peroxide has been the most widely used oxidizing agent for the last 20 years. Colorimetric [8] methods measure the hydrogen peroxide concentration continuously (with an FIA system) with high precision and accuracy, but the cost of the spectrophotometer means that industrial implementation on a large scale has never been done. This paper describes a sensor system that can measure and control the hydrogen peroxide concentration in industrial processes, making use of the amperometric principle [9] with a three-electrode potentiostatic set-up [9] equipped with a combined glass electrode and PT100 probe to measure pH and temperature.

Results

Conclusion