Absorption of Proteins and Peptides in the Far Ultraviolet

Abstract
An absorption peak for the peptide bond at 187 nanometers has been confirmed; a protein assay at this wavelength allows quantitation of proteins in aqueous solution at concentrations between 0.1 and 25 micrograms per milliliter. Assays are conducted at 6°C to take advantage of the reduction of end-absorption of water with temperature.