ue Residue 15 5.1. Use of Filtration. 16 5.2. Centrifugation. 17 6. Removing Nonlipids from Lipid Extracts 6.1. Removal of Nonlipids by Evaporation and Reextraction. 17. 17 6.2. Prewashing the Tissue Sample. 6.3. Removal of Nonlipids by Precipitating the Lipids with the Proteins. 18. 19 6.4. Liquid/Liquid Partitioning. 19 6.5. Removal of Nonlipids by Dialysis 6.6. Separation from Nonlipids by Changing a 21 Partition Constant.