Determination of the Dissociation Constant of Thymol Blue with Diode-Laser/Fiber-Optic Thermal Lensing Spectroscopy

摘要

The simple and convenient measurement of the dissociation constant of an indicator, thymol blue, was achieved by using a portable diode-laser/fiber-optic thermal lensing spectroscopy, which consisted of a visible diode laser, a photodiode, and an optical fiber. It gives comparable results to the cited value obtained from a conventional UV/VIS spectroscopy.