glycol determination in used oils

We can detect glycol by spectrometric-ICP analysis. Do spectro on new oil, and keep data for additives to compare with used oil. When doing spectro on used oil, you should found the same additives as new one. If you found also B, Na, K, and Cu, this means that you could have glycol contamination, if you do not have B, Na and K in the new oil. These three elements are present in the cooling fluid as inhibitors of corrosion, and copper is from the cooling system. Also, presence of water is one of trace of cooling fluid.

hope this can help
Djaouida

FTIR could be also one of glycol test analysis. You can see on the spectrum a pic on 3500cm-1, as water (OH), and 1010-1100 cm-1 as glycol.
djaouida

FTI is used to test glycol presence in the lube oil.

you can find few articles related on www. practocingoilanalysis.com

Good luck