O. Orwar, H. A. Fishman, M. Sundahl, V. Banthia, R. Dadoo, and R. N. Zare, “Determination of Photodestruction Quantum Yields Using Capillary Electrophoresis: Application to o-Phthalaldehyde/B-Mercaptoethanol-Labeled Amino Acids,” J. Liquid Chromatog. 18, 3833-3846 (1995).