Triple mass spectrometry (MS/MS/MS) with a floated collision cell in a four‐sector tandem mass spectrometer

A method is described for carrying out triple mass spectrometry (MS/MS/MS) experiments with an electrically floated collision cell in the third field‐free region on a tandem double‐focusing mass spectrometer. The method described may use magnet calibration obtained at any accelerating voltage and is generally applicable at any value of the collision cell voltage. The utility of the method to acquire MS/MS/MS spectra of enhanced quality is demonstrated on a JEOL JMS‐HX110/HX110 four‐sector mass spectrometer.