The invention provides extraction columns for the purification of an
analyte (e.g., a biological macromolecule, such as a peptide, protein or
nucleic acid) from a sample solution, as well as methods for making and
using such columns. The columns typically include a bed of extraction
media positioned in the column between two frits. In some embodiments,
the extraction columns employ modified pipette tips as column bodies. In
some embodiments, the invention provides methods characterized by the
elution of analyte in a small volume of liquid.