Very economical, rapid and pure methods for the production of115mIn and113mIn from115Cd and113Sn, respectively are described. The methods are based on the extraction of115mIn by o-xylene from 7.2M H2SO4 −0.06M HBr, and its reextraction with ≈11M H2SO4 −0.06M HBr from n-hexane. The γ-spectra of the generated115mIn and113mIn indicate that they are free from any other interferences.