METHOD AND ARRANGEMENT IN A GEL ELECTROPHORESIS APPARATUS

摘要

In a gel electrophoresis apparatus having a light source (7), whose light beam (6) is to be introduced into an electrophoresis gel (1) through one of its lateral edges to enable detection of at least one component which is migrating in the electrophoresis gel (1) and which is labelled with a fluorescent substance, a means (8, 9) is adapted to sweep the laser beam (6) back and forth across said one lateral edge of the electrophoresis gel (1) to introduce the light beam into the electrophoresis gel (1) at different points of incidence, and a sensor (13, 14, 15) is adapted to measure the intensity of the light beam (6) introduced at said different points of incidence after that, it at least partially, has passed through the electrophoresis gel (1), and to lock the light beam (6) at the point of incidence at which the highest light intensity is measured.