Photometric measurement of plasma pH.

@article{Slyke1949PhotometricMO,
  title={Photometric measurement of plasma pH.},
  author={Donald D. Van Slyke and J R Weisiger and K K Van Slyke},
  journal={The Journal of biological chemistry},
  year={1949},
  volume={179 2},
  pages={
          743-56
        }
}