Essential elements of biosensor development for water quality monitoring

Abstract

Water shortage and water pollution are urgent problems worldwide. Effective management of water resources requires a reliable and continuous monitoring of water quality to identify contamination and the source of pollution. Traditional analysis techniques based on laboratory instrumentation are insufficient to fulfil existing monitoring requirements. By utilizing miniaturised biosensors in water quality monitoring, real-time analysis which avoids sample degradation can be achieved on-site. This article reviews common used materials and fabrication techniques for lab-ona-chip (LOC) system with sample-in-answer-out capability.Such systems will bring advantages such as low cost, high throughput and device portability to on-site determinations. The development of biosensor-based LOC systems is dependent on two essential elements: substrate material and fabrication techniques.

A review of emerging trends on water quality measurement sensors

“…Results are obtained by depositing the sensor material at the tip of an optical sensor. The choice of sensor material governs sensitivity, selectivity and analytical ranges [19].The modulated light source excites the sensing phase whose fluorescence reception intensity changes according to the pH of the measured solution. The transducer turns the emitted radiation into an electrical signal .The control circuit calculates the pH value, makes the calibration, and displays the results.…”