Left: TPD mass spectra obtained after 360 min of codeposition of CH₃CHO + H (exp. c2) at 10 K. The applied deposition ratio of CH₃CHO:H was 2:40, and the used H-atom flux was 1.2 × 10¹³ atoms cm⁻² s⁻¹. Only relevant m/z channels are shown. The arrows and dashed lines indicate the peak position of the corresponding COMs. Right: comparison of the ionization fragmentation pattern of the detected product (black) with the standard pattern in the NIST database (red).