When a salt electrolyte is dissolved in water, the boiling temperature will increase. For example, 6.7m CaCl2(aq) has a boiling temperature of 120°C at 1 atm. And when this solution is heated to its boiling temperature, only water is evaporated, while the ions remain in the solution. So the steam consists of water only.

My question is: is it appropriate to consider the steam saturated? Because from the temperature-pressure relation of pure water, the vapor at 1 atm, 120°C is actually superheated steam.

If you have seen any related literature or discussion on this topic, please also share with me. Thanks!