The invention relates to devices and systems for use in the slicing, separation and possible disposal of slices of a sample, such as a bodily tissue sample. The invention relates to a multi-blade chopper and a guide track comprising knobs along its surface designed to preferably operate in couple in order to cut and separate/dispose a sliced sample in an easy and quick manner. The chopper can be connected in some embodiments to means for electrically activate its cutting elements for working as electrodes so that the passive electrical characteristics of the sample can be analysed upon the cut.