A method of detecting molecular chirality using photoelectron circular dichroism (PECD). A target sample is located in an evacuated interaction zone. A magnetic field is directed parallel with a propagation axis that extends through said interaction zone. Molecules of the target sample are ionized by a laser configured to generate circularly polarised ionizing laser light along the propagation axis. A respective particle detector is located forwardly and backwardly with respect to the interaction zone and detects, respectively, photoelectrons that travel forwardly and backwardly from the ionized molecules. The chirality of the molecules is determined depending on the relative number of photoelectrons detected respectively by the forward and backward detectors.
