title: Gas chromatographic determination of propionic acid in bread and cake.
abstract: A simple and accurate method is presented for gas-liquid chromatographic (GLC) determination of propionic acid in bakery products. Propionic acid is extracted with a mixture of dichloromethane and formic acid to which isobutyric acid has been added as an internal standard. The extract is injected directly into the GLC system. A glass column packed with 5% SP-1000 is used. The simplicity and convenience of the method make it suitable for routine determination.
mesh_terms: D001939:Bread / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D005503:Food Additives / Q000032:analysis*; D005504:Food Analysis; D011422:Propionates / Q000032:analysis
chemical_list: D005503:Food Additives; D011422:Propionates; C029658:propionic acid