[Simple purification of acetonitrile for high performance liquid chromatography (HPLC) of peptides and proteins (author's transl)].

: We report a simple method of purifying commercially available acetonitrile by column chromatography over aluminium oxide (neutral). The absorption at 220 nm or 230 nm is decreased to values (A = 0.03) which provide a constant baseline in high performance liquid chromatography: the analyses of proteins and peptides area easier.