Значение и использование
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 Thistest method covers the quantitative determination of totalmonoglyceride, total diglyceride, total triglyceride, and free andtotal glycerin in B-100 methyl esters by gas chromatography. Therange of quantitation for monoglyceride is 0.009 % to 0.77860 % bymass, for diglyceride is 0.092353 % to 0.54475 % by mass, and fortriglyceride is 0.00092857 % to 1.3881 % by mass. The range ofquantitation for free glycerin is 0.0005714 % to 0.019533 % by massand for total glycerin from 0.0090714 % to 0.42767 % by mass. Thisprocedure is not applicable to vegetable oil methyl esters obtainedfrom lauric oils, such as coconut oil and palm kernel oil.
1.2 Thevalues stated in SI units are to be regarded as standard. No otherunits of measurement are included in this standard.
1.3This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.
1.4This international standard was developed in accordance withinternationally recognized principles on standardizationestablished in the Decision on Principles for the Development ofInternational Standards, Guides and Recommendations issued by theWorld Trade Organization Technical Barriers to Trade (TBT)Committee.