This Standard establishes the method for quantitative determination of free glycerin, monoglycerides, diglycerides, triglycerides and total glycerin for gas chromatography in samples of biodiesel obtained from any raw material, including coconut, palm and animal fat. However, it is not applied for biodiesel from castor oil.
ABNT NBR 15908-2012 history
2012ABNT NBR 15908-2012 Biodiesel — Determination of free glycerin, monoglycerides, diglycerides, triglycerides and total glycerin by gas chromatography