A review on pH sensitive materials for sensors and detection methods

Abstract

This article focuses on the review of current material and techniques for the selection of best combination among the pH sensitive materials related to pH detection methods and sensors. Researchers have studied various pH sensitive polymers, chemicals and found that few measurement techniques do not have enough accuracy to observe the pH when salt is present and this has been examined further. The current work is based on comprehensive literature survey and discusses a variety of pH sensitive materials for detection methods using different sensors including their applications, mechanism of action and merits, demerits. This analysis leads to a conclusion that there are a number of important properties of the pH sensitive material and the matrix, which has to be considered in the light of a target application finally dictating the characteristics of the sensor. In many cases, a combinatorial approach of two pH sensitive materials or sensors seems to be more effective with better real time response, sensitivity, sensor resolution and operational stability in place of the common standard techniques.