1987 年 3 巻 1 号 p. 7-9
A fiber-optic pH sensor has been constructed by immobilizing fluorescein isothiocyanate (FITC) on the end surface of the optical fiber. The pH response is reversible in the range 4.0-6.9, precision being±0.1. Due to implantation of FITC as a monolayer, the intrinsic response time is less than 10ms.