Hydrogen plays a crucial role in the ongoing transformation of the energy sector and is anticipated to become increasingly significant as a fuel for gas turbines. In the construction of gas turbine components, superalloys, particularly Ni-based alloys, are extensively employed. To gain a deeper understanding of the mechanisms underlying hydrogen embrittlement, it is essential to identify the specific structural features within the material which act as hydrogen trapping sites. Thermal desorption spectroscopy (TDS) allows the identification of different trapping sites by heating hydrogen charged samples with a specific heating rate. In this study, the goal was to detect differences in trapping sites between an fcc single phase Nickel alloy (VDM Alloy X) and a two phase y/y' Ni-based superalloy (Waspaloy). Differences in the number of trapping sites and the hydrogen concentration of each site are detected.