Breck (1972) has proposed a new approach for determining the "redox level" (Eh) in aerated natural waters and has described an electrode arrangement which, supposedly, is capable of accurately measuring Eh in such waters.
Ben-Yaakov, Sam, and I. R. Kaplan. 1973. "Comments on "Redox potentials by equilibration," by W. G. Breck." Journal of Marine Research 31, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1255