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Topic: test for glycerin  (Read 4420 times)

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jimbo

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test for glycerin
« on: January 22, 2005, 02:28:02 PM »
yall,

anyone know of a way to test vegetable oil for the presence of glycerin?

thanx,

jim :)
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Offline kevins

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Re:test for glycerin
« Reply #1 on: January 24, 2005, 09:10:52 AM »
Because of different kinds of vegetable oil, try to compare with the standard oils by GC method.
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Offline jdurg

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Re:test for glycerin
« Reply #2 on: January 24, 2005, 10:24:06 AM »
I know that glycerin can be detected by its reaction with potassium permanganate (I.E. is smokes and catches fire), but if the glycerin is very heavily mixed into the oil I don't know if would react.  Also, I'm not sure if the KMnO4 will react adversely with the oil.  Hmmm....
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Offline kevins

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Re:test for glycerin
« Reply #3 on: January 26, 2005, 07:26:35 AM »
please search

ASTM

D 6584 Test Method for Determination of Free and Total Glycerine in B-100 Biodiesel Methyl Esters by Gas Chromatography
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