2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93262We describe a method to perform a single quantum measurement of an arbitrary observable of a single ion moving in a harmonic potential. We illustrate the measurement procedure with explicit examples, namely the position and phase observables.4 pages RevTeX, 4 eps figures, packaged together with tar and gzipQuantum Physicstext