Optical Oxygen and pH Sensors for Monitoring Biofermentation Processes

摘要

Advances in sensor materials and optoelectronics have enabled new optical sensors for use in biotechnology, food and beverage processing, and more. These fiber optic chemical sensors work by trapping an oxygen-sensitive fluorophore or pH indicator dyein a sol-gel host matrix that is applied to an adhesive patch, the tip of a fiber, or a flat substrate such as a cuvette. The indicator materials change optical properties in response to analytes in their environment, and electronics measure the response. For oxygen, the NeoFox Phase fluorometer measures the partial pressure of dissolved or gaseous oxygen. For pH, a spectrometer measures the colorimetric response of the pH dye.