Silicate solution, infrared absorption

Table I. Infrared Absorption Spectra of Silicate Solutions...

In this procedmre, the phospholipids are first adsorbed on silicic acid from chloroform-acetone solution, and the nonadsorbed lipids are measured in carbon tetrachloride solution with a high-resolution infrared spectrophotometer (Perkin-Elmer Model 421). Absorbance readings are taken at stationary instrument settings (frequencies or wavelengths) corresponding to the carbonyl absorption peaks of triglycerides and cholesteryl esters. From suitable calibration data, concentrations of these two components can be calculated. 

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