AOCS Division Newsletter




	printer-friendly version . send feedback on this newsletter Phospholipid Divison web page AOCS Phospholipid Division Newsletter October 2007 ³¹P-NMR Round Robin Tests on Phospholipids Bernd W. K. Diehl, Ph.D. The goal of this Round Robin test was to demonstrate that the results of ³¹P-NMR analysis of phospholipids is independent of laboratory, NMR instrument manufacturer, NMR filed strength, and test material. Validation of the sample preparation method has been previously published and was not a part of this evaluation. Five different materials (native soy lecithin, 90% phosphtidylserine, DSPC, egg yolk lecithin, and 20% phosphtidylserine) were prepared for analysis by Spectral Services. Twenty one laboratories participated in the study: eleven industrial, seven academic, and three research institutes. Equipment included three different manufacturers and ten different probes. Six different field strengths were also tested. Results: Twenty five of twenty nine NMR units were able to analyze the five different materials to within a variation of 1%. Reasons for some of the failures included incorrect parameter and decoupler settings, and insufficient instrument tuning. Within the scope of statistical deviations, results were independent of the laboratory and material analyzed. The number of units from different manufacturers was too low to determine significance, and some errors in field strength results were dependent upon the signal/noise ratio. Also in this newsletter: Message from the Chair, Jonathan Maynes Ring trial validation of a method for the extraction of DNA from soy lecithins, by Waiblinger, H. U.; Ernst, B.; Graf, N.; Pietsch, K. In Memoriam: David W. Yesair (from inform August 2007) Results of AOCS Lecithin Short Course Québec 2007, by Willem van Nieuwenhuyzen Synthesis of 1,3- and 1,2-Diphosphatidylglycerol Moghis U. Ahmad, U. Murali Krishna, Shoukath M. Ali, Sreeti Choudhury, Imran Ahmad. Lipids (2007) 42:291-296 Technical Program 2007 Patent Applications: Enzymatic modification of lecithin Extracts and Distillates: Phospholipid species analysis Business News: Tight oilseed/oil markets forecast AOCS, 2710 S. Boulder, Urbana, IL 61802-6996 USA	Division Officers Chairperson Jonathan Maynes phone: 1-314-982-3162 fax: 1-314-982-2899 Vice Chairperson/MDC Gary List phone: 1-309-681-6388 fax: 1-309-681-6340 Secretary Moghis Ahmad phone: 1-847-775-4568 fax: 1-847-887-9281 Treasurer Toni Wang phone: 1-515-294-5448 fax:1-515-294-8181 Member-at-Large Bernie Szuhaj phone: 1-260-489-6849 Member-at-Large Lance Colbert phone: 1-217-451-5802 fax: 1-217-451-2457 Member-at-Large Randy Zigmont phone: 1-203-262-7100 fax: 1-203-262-7101 Member-at-Large Walt Shaw phone: 1-205-663-2494 fax: 1-205-663-0756 Member-at-Large Susan Gurkin phone: 1-770-986-6268 fax: 1-770-986-6282 Member-at-Large Willem van Nieuwenhuyzen phone: +31 72 505 5617 fax. +31 72 505 5618 Immediate Past Chairperson Bruce Sebree phone: 1-217-451-4067 fax: 1-217-451-2693 Past Chairperson Joseph Casey phone:1-260-425-5926 fax: 1-260-425-6435