has proper occurrent part field ionisation mass spectrometry pyrolysis field ionisation mass spectrometry pyFIMS pyrolysis field ionization mass spectrometry CHMO:0000495 py-FIMS pyrolysis-field ionization mass spectroscopy Mass spectrometry where the sample is pyrolysed then ionised by interaction with a high electric field. Py-FIMS PyFIMS pyrolysis-field ionisation mass spectrometry pyrolysis-field ionization mass spectrometry pyrolysis field ionisation mass spectroscopy pyrolysis field ionization mass spectroscopy pyrolysis-field ionisation mass spectroscopy pyrolysis