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
guideline. 1  A non-specific rule or principle that provides direction to action or behaviour. He considered the Ten Commandments more a guideline than a requirement. 2  A plan or explanation to guide one in setting standards or determining a course of action. 3  A light line, used in lettering, to help align the text.