Desorption traces of CH₃NCO, CH₃C(0)NH₂, and NH₂C(O)NH₂ with desorption parameters obtained with the Redhead-TST method (red) and the Redhead method, assuming a pre-exponential factor of 10¹³ s⁻¹ (blue). Peak desorption temperatures are indicated in the plot for each species. The desorption profile is simulated with a first-order Polanyi-Wigner equation, surface coverage of 1×10¹⁵ molecules cm², and heating rate of 1 K century⁻¹ (solid lines), which is appropriate for the ISM, or the heating rate of 5 K min⁻¹ (dashed lines) used in these experiments.