where the Cd is the mass specific heat of the dispersion media, md is the mass dispersion, mFe+Mn is the iron and manganese masses related to the MNP diluted in the dispersion and dT/dt|max is the maximal temperature slope immediately after switching HAC on. Solvents in our experiment were water (Cdwater= 4.18 J/g°C) or water with different glycerol fractions from 0 to 50 %, considering Cdglycerol = 2.43 J/g°C and for mixed water-glycerol Cdmix= 3.30 J/g°C. Sample volume employed for the experiment was 1 mL.