Abstract: Explosives concealed within electronic devices, such as smartphones and tablet PCs, are detected using NQR spectroscopy. For example, a suspect electronic device can be placed inside a NQR scanner and be subject to interrogation electromagnetic radiation at varying frequencies. The electronic device is exposed to interrogation electromagnetic radiation at frequencies that correspond to chemical components of various explosives. In the event that an explosive chemical component is present inside the electronic device, irradiating the electronic device with interrogation electromagnetic radiation at the specific NQR frequency of that explosive chemical component will cause the explosive chemical component to emit feedback electromagnetic radiation at that frequency. Consequently, the NQR scanner can measure the feedback electromagnetic radiation and determine that the frequency of the feedback electromagnetic radiation indicates the presence of the explosive chemical component inside the electronic device.