A system and method for spectrophotometrically measuring the total alkalinity of a liquid sample. In a particular aspect, the method involves equilibration of a CO2 gas with a sample solution across the permeable walls of a Teflon AF 2400 liquid core waveguide. The waveguide acts as both an equilibration membrane and an optical cell in which spectrophotometric pH measurements are obtained via measurements of absorbance ratios.
Byrne, Robert H.; Kaltenbacher, Eric; and Liu, Xuewu, "System and method for spectrophotometric measurement of total alkalinity using a liquid core waveguide" (2010). USF Patents. 490.
University of South Florida