The common phospholipids from biological sources were quantitated using phosphorus-31 nuclear magnetic resonance (NMR) spectroscopy in conjunction with an analytical reagent composed of two parts: 1) 2 ml of reagent chloroform in which was dissolved 0. 01-100 mg of crude tissue lipid extracted from tissue sources using chloroform-methanol 2:1. the extract having been washed with 0. 2 ... https://yeswellneses.shop/product-category/vitamin-d/