The oil separators are moulded by using fibres and resin. Apparently, the filtration of oil through the separators causes a reaction between the resin and the oil. Is there an analysis to predict the presence of resin in the oil?
Dear Nausheen,
There are two major methods employed for the analysis of resins:
1-FT-IR:
The spectrum of the alkyd resin may be obtained by any of the standard
methods of infrared spectroscopy. The simplest method is to examine the
resin in film form; for a liquid resin this can be done by pressing the sample
between two sodium chloride plates and for a solid by evaporation from
solution on to a sodium chloride plate or potassium bromide disc (taking
care to remove residual solvent under vacuum or in a current of inert gas
at 50°C).
The resin may also be examined in solution (in a solvent, the spectrum
of which causes minimum interference, such as CS2 or Cd4), as a mull with
an inert liquid (liquid paraffin or a fluorinated hydrocarbon), or as a pressed
disc with inorganic powder (potassium bromide).
The spectrum obtained will show general features characteristic of most
alkyd resins and special features which assist in the identification of particular
components.
http://pac.iupac.org/publications/pac/pdf/1973/pdf/3302x0411.pdf
2-GC-MS
Background
Natural resins were frequently employed as adhesives or as components of oleo-resinous media in paintings in the past. The identification of vegetable resins is still an open problem. The aim of this paper is to analyze by GC-MS some vegetable resins frequently employed in paintings, such as Venice turpentine, dammar, copal, elemi in order to identify their main component in raw and aged samples. Some molecules are proposed as chemical “markers” to identify these natural resins.
Results
The results obtained on standards allowed us to successfully analyze sample collected from one work of art: the Madonna with the Infant and Angels by Antonello da Messina (XV century).
Conclusion
The results obtained confirm that the painting the artist originally used a mixture of linseed oil and natural resin (Venice turpentine) as binding medium.
Keywords: Binding media, Paintings, Natural resins, Marker, GC-MS, Madonna with the Infant and Angels, Antonello da Messina.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3464792/
3-GC-FID
https://www.google.ps/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjftLnki4zLAhWBgBoKHQ-MBlQQIAgcMAA&url=https%3A%2F%2Fwebcache.googleusercontent.com%2Fsearch%3Fq%3Dcache%3AHGE7QO2Zj3kJ%3Ahttps%3A%2F%2Fwww.unodc.org%2Fdocuments%2Fscientific%2FST-NAR-40-Ebook.pdf%2B%26cd%3D1%26hl%3Den%26ct%3Dclnk%26gl%3Dps&usg=AFQjCNHOxCWaZp7dflxq5_447Y7W9flmDQ&sig2=Y2hwLLlXGV7UxZtfC9uKbw
Rafik
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