ForGlycerin, the5point curve cor-
responds to50, 150, 250, 350and
500ppm injected. Enter thesenum-
bers in the Injected columnof the
spreadsheet .
In theArea/Height columnenter the
area reported for theGlycerinpeak
for eachof the five levels. Take this
data from theprintout for eachof
the calibration runspreviouslyper-
formed.
This should result ina relatively
straight line calibration curveusing
a single linebest fit .
TheButanetriol curve isonlya sin-
glepoint since theButanetriol inter-
nal standard is always present at
the sameamount ( 1000ppm ) re-
gardless of whether you inject a
level1,2,3,4,5 standardor theun-
knownBiodiesel itself.
You canaverageup to3 injections
by clicking the “use2previousar-
easalso” button.
Don’t forget to save the curves us-
ingauniquename for eachone
PerformingASTM 6584 free and total glycerin in
BioDiesel using anSRI GasChromatograph
andPeakSimple software
