Fig. 3.
Modeled phosphine atmospheric concentration calculated with respect to percent of total dissolved inorganic P as phosphite in freshwater, with the remainder phosphate. These calculations calculate the quantity of phosphine in air (ng/m3) resulting from disproportionation of phosphite (reaction 1), which is dependent on pH, temperature, amount of P as phosphite, and total P. (A) Dependence on PH3 concentration on total phosphorus in solution, with constant temperature and pH. (B) Dependence on pH. (C) Dependence on temperature.