The influence of added Li on the ICP characteristics is investigated by computer simulation. The transport and the thermodynamic parameters of Li in the temperature interval between 300 and 13,000 K are taken from the literature, while in the case of absence of those, the data were estimated. The HiFI computer program was used for calculation of spatial distributions of temperature, velocity, and electromagnetic fields for argon plasma with the presence of different quantities of Li up to 30%. On the basis of calculated temperature field and equilibrium plasma composition the spatial distribution of electron density was determined. It was found that the addition of Li considerably influences the spatial distributions of all analyzed plasma parameters at Li concentrations higher than 1%. It is shown that the electron density is the most sensible among all analyzed parameters of the presence of Li.