Glucosinolates and derived products in cruciferous vegetables: gas-liquid chromatographic determination of the aglucon derivatives from cabbage.

A procedure is described for identifying and quantitatively determining the glucosinolates found in edible cabbage. The intact glucosinolates are extracted and their aglucons are released into solvent after a special enzymatic hydrolysis step. The resulting isothiocyanates and oxazolidinethiones are separated by a gas-liquid chromatographic procedure that allows the individual aglucons to be identified and their amounts to be estimated by comparison with an internal reference.