In this technique, Penning and quadrupole traps are used to hold ions as they are separated into fragments based on the ratio of the namesake property to charge.
One arrangement for a device used to perform this technique achieves a pi over 4 root 2 radian deflection. That Mattauch-Herzog geometry is used by a device that performs this technique using static electric and magnetic fields.  For a substance with known cyclotron frequency, this technique yields the free induction decay, a signal that undergoes a Fourier transform. During this technique, ketones may undergo a beta-cleavage in concert with gamma hydrogen acquisition in the McLafferty rearrangement. In this technique, Penning and quadrupole traps are used to hold ions as they are separated into fragments based on the ratio of the namesake property to charge. For 10 points, name this technique that can identify compounds, including those with isotopes, based on their size
One arrangement for a device used to perform this technique achieves a pi over 4 root 2 radian deflection.
mass spectrometry [prompt on "MS"] 