1. Optimized separation of benzoic acid and sorbic acid as preservatives in foodstuffs by reversed phase high performance liquid chromatography;Frohlich;Journal of High Resolution Chromatography and Chromatographic Communications,1982
2. Bestimmung von sorbinsaure, benzoesaure und PHB-estern in lebensmitteln mittels HPL-C;Gertz;Deutsch Lebensmit-tel-Rundschau,1983
3. Rapid quantitative method for simultaneous determination of benzoic acid, sorbic acid and four parabens in meat and nonmeat products by liquid chromatography;Sher Ali;Journal of the Association of Official Analytical Chemists,1985