[en] A systematic study of the relative thick-target yields of prompt γ-rays following proton bombardment has been carried out at Esub(p)=1, 1.7 and 2.4 MeV for the elements Z=3-9, 11-21. The relevant spectra for each element are depicted and a table of the most suitable γ-rays for elemental analysis are given. Depending on the strength of the reaction cross section, the sensitivity limits of the detection vary from ppm to a few percent under practical measuring arrangements. Particular aspects of the measuring techniques are discussed