The Identification and Quantification of Steryl Glucosides in Precipitates from Commercial Biodiesel

摘要: There have been several discoveries of unexpected precipitates in manufacturing facilities, transport vessels, and storage tanks containing commercial biodiesel. In some cases these formed during at temperatures above the cloud point fuel. High performance liquid chromatography (HPLC) mass spectrometry (MS) methods were applied to 24 field receipt samples solids from such biodiesels. The analyses revealed presence steryl glucosides (SG), common phytosterols (plant sterol) found crude soybean oil many other plant materials, biodiesel precipitates. Quantitative analysis SG concentrations as high 68 wt% provided material (which had not previously washed with solvent remove entrained biodiesel). no present. others they constituted all non-biodiesel Monacylglycerols diacylglycerols, products incomplete transesterification triacylglycerols, also present samples. normal phase reverse described this report could be used analyze quantitatively an HPLC instrument equipped either evaporative light-scattering detector (ELSD) or a more UV operating 205 nm.