time-of-flight mass spectrometer tandem time-of-flight mass spectrometer tandem TOF mass spectrometer TOF/TOF mass spectrometer https://orcid.org/0000-0001-5985-7429 CHMO:0002310 2009-08-26T05:01:36Z A mass spectrometer which uses two time-of-flight mass-to-charge analysers in sequence to separate ions. The first time-of-flight analyser isolates precursor ions of choice using a velocity filter, and the second time-of-flight analyser detects the fragment ions. tandem (TOF/TOF) mass spectrometer