Building a better pH meter

A new sensor that can precisely measure physiological pH levels has been developed by researchers at the University of Toronto, Canada. The device could improve studies of many different diseases, including cystic fibrosis and cancer, where pH is a critical factor in disease progression. "Being able to detect pH levels in a living biological system in real time is crucial to detecting and understanding conditions associated with pH imbalance," explains team leader Xiao-an Zhang, an expert in chemical probes for biomedical imaging.