| Free and bonded glycerin content is an indicator of biodiesel
quality. Low levels of total glycerin ensure high conversion of the oil,
while high levels of glycerin and glycerides can cause injector deposits,
clogged fuelling systems, and poor cold weather operation. The
determination of glycerin levels provides verification that the free
glycerin, mono-glycerides, di-glycerides, tri-glycerides, and total
glycerin contents in B100 are lower than the limits set in EN 14214:2003.
This application note relates specifically to the
use of the Thermo Scientific TRACE GC
UltraTM and the Thermo
Scientific TriPlusTM autosampler
for use in the determination of free and total glycerin in
biodiesel, according to EN 14105. The described method is suitable for biodiesel
produced from rapeseed, soybean, sunflower oil, and is not suitable for
biodiesel produced from or containing coconut and palm kernel oil, due to the
presence of overlapping peaks. A true cold On-column injector prevents
discrimination of the heavier fraction and eliminates any risk of degradation of
labile components like triglycerides. This grants excellent recovery and
absolute sample integrity. |
|
0 Items