has proper occurrent part field desorption mass spectrometry pyrolysis field desorption mass spectrometry Py-FDMS Mass spectrometry where the sample is pyrolysed then deposited on a solid surface known as an 'emitter' and ionised by interaction with a high electric field. pyrolysis-field desorption mass spectroscopy py-FDMS PyFDMS CHMO:0000493 pyrolysis field desorption mass spectroscopy pyFDMS pyrolysis-field desorption mass spectrometry pyrolysis field ionisation mass spectrometry pyrolysis