Thank you for your kindly help. Characterization of Phosphoglycerides by Chemical and Enzymatic Hydrolysis on Thin Layer Plates In Situ Journal of Liquid Chromatography & Related Technologies Volume 10, Issue 8 & 9, 1987, Pages 1687 - 1705 Authors: Juan G. Alvareza; Sidney S. Levina; Scott Kleinbarta; Bayard T. Storeya; Joseph C. Touchstonea DOI: 10.1080/01483918708066794