Capillary electrophoresis is an analytical technique that separates ions based on their electrophoretic mobility in a thin capillary tube when an electric field is applied. It allows for much faster separation than traditional electrophoresis in under 15 minutes. Capillary electrophoresis can sequence up to 750,000 nucleotides per day due to its high resolution, reproducibility, and ability to be automated. It works by applying an electric field that causes ions to migrate through the capillary at different rates depending on their size and charge, separating them into distinct bands that can then be detected.