Active Standard ASTM D6584 | Developed by Subcommittee: D02.04.0L
Book of Standards Volume: 05.03
Historical (view previous versions of standard)
Significance and Use
5.1 Free and bonded glycerin content reflects the quality of biodiesel. A high content of free glycerin may cause problems during storage, or in the fuel system, due to separation of the glycerin. A high total glycerin content can lead to injector fouling and may also contribute to the formation of deposits at injection nozzles, pistons, and valves.
1.1 This test method covers the quantitative determination of total monoglyceride, total diglyceride, total triglyceride, and free and total glycerin in B-100 methyl esters by gas chromatography. The range of quantitation for monoglyceride is 0.009 to 0.77860 mass %, for diglyceride is 0.092353 to 0.54475 mass %, and for triglyceride is 0.00092857 to 1.3881 mass %. The range of quantitation for free glycerin is 0.0005714 to 0.019533 mass % and for total glycerin from 0.0090714 to 0.42767 mass %. This procedure is not applicable to vegetable oil methyl esters obtained from lauric oils, such as coconut oil and palm kernel oil.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards
E355 Practice for Gas Chromatography Terms and Relationships
E594 Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography
ICS Number Code 75.160.20 (Liquid fuels)