Solidifying / gelling oil for use in an XRF

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Hi all,

I have been testing the cheaper bench-top XRF's for use in oil analysis, and results have been unsatisfactory (difficulty reading lighter elements). Sample prep consists of the oil in a cup with a mylar film at the bottom.

We are considering using one of our in-house big XRF's, however there is no way I am lowering oil into the sampling chamber with just a thin film preventing the oil from flooding the chamber.

I know that some NZealanders solidify the oil before testing.

http://www.crl.co.nz/services/...lysis_lubricants.htm

Do any of you have an idea of how this is done?

How to I solidify an oil sample?

Some sort of cement? Epoxy, hardner?

Its not done via freezing. Oil hardener? http://www.annathered.com/2009...panese-oil-hardener/

Thank you for your replies.

Regards

Andrew

8/22/135:17 AM

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rttechMember

Hi Andrew,
The lighter elements were another difficulty we encountered, it appears the XRF has to develop a little further before it will be useful,
Re the Japanese Oil Hardener, you could "nuke" the oil hardener on it's own then harden the sample and "nuke" the combination and then a simple subtraction of the hardener elements should equal the sample, once completed then recheck by running a portion of the same sample without the hardener through the ICP Spectro' to confirm accuracy, keep in mind you will need to filter the sample down to 5 µm before the sequence to allow the ICP Spectro' to "see" what the XRF can see, the reason for the work in the first instance,
Regards
Rob S
www.rttech.com.au

8/22/135:01 PM

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andrewMember

Thanks Rob, the oil hardner is supposedly made from pure vegetable fats, so I wouldn't expect too much in terms of interfering elements. Going to order some hardner off amazon, will let you know.

8/23/131:23 AM

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