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
barline: a vertical line (or lines) drawn across a staff (or if there are many lines, across a number of staves) to mark off measures (or bars) of a particular length, i.e. containing a number of notes and/or rests whose total time value is given by the time signature.