At the end of the column they elute one at a time. During the entire chromatography process the eluent is collected in a series of fractions. Fractions can be collected automatically by means of fraction collectors. The productivity of chromatography can be increased by running several columns at a time.
dash - the act of moving with great haste; he made a dash for the door bolt rush, rushing, haste, hurry - the act of moving hurriedly and in a careless manner; in his haste to leave he forgot his book
Noun. 1. waterline-a line corresponding to the surface of the water when the vessel is afloat on an even keel; often painted on the hull of a ship. water line, water level. line-a spatial location defined by a real or imaginary unidimensional extent.