G. Ogden

The stability of the o-phthalaldehyde/2-mercaptoethanol derivatives of amino acids: an investigation using high-pressure liquid chromatography with a precolumn derivatization technique.

J. Cooper, D. Turnell, J. McINTOSH, 1984, Analytical biochemistry.

Analysis in the ion exchange tradition

G. Ogden, 1986, Nature.

Amino acid analysis: an overview of current methods

P. Foldi, G. Ogden, 1987 .