title: Determination of optical purity in partially racemized samples of l-aspartic acid by means of liquid crystals.
abstract: A method for the determination of the optical purity of partially racemized samples of l-aspartic acid, based on the measurement of the pitch and handedness of cholesteric mesophases induced in MBBA (p-methoxybenzylidene-p'-n-butylaniline), is described. The minimum quantity of aspartic acid required varies with the optical purity of the sample (from 50 mug for an enantiomeric purity of 10-20% down to 5 mug for purities around 90%).
authors.affiliation: Istituto di Chimica Organica, Universitá di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Bertocchi