I should realize a GC-MS analysis for a fixed oil, and to avoid the worse injection volume of both (volume of sample and the solubilizing solvent), I need some guidelines by researchers.
Thanks in advance for your expected answers.
Before getting the answers about the amount of volume, I agree with @ Garry Codling answer https://www.researchgate.net/profile/Garry-Codling who said about the basic principle for choosing solvents for GC-MS analysis?
(A key Factor to consider in GCMS is the space of the liner, you need to select a solvent that for the given volume will vaporize but not expand too far and contaminate the exterior of the injector port and septa etc. The link below is a good calculator for deciding if your solvent/injection volume is a risk.
http://www.restek.com/images/calcs/calc_backflash.htm
If you contaminate the injector it can be a lot of work to clean and purge this
Guillaume is right that hexane is a good solvent but if you wish multiple injections then you will risk evaporation of the sample, iso-octane, nonane and dodecane are more stable but you need to be sure your compounds of interest will dissolve.
Garry).
Note that Hexane is recommanded as solvent solubilizing for use in gas chromatography cg-ms, because it can produce good recoveries of low levels of semi-volatiles and often gives cleaner extracts. Peak shapes can be better than for dichloromethane with a splitless injector for some early/medium eluting compounds as you can use the 'solvent trapping effect' at a higher initial column oven temperature. In addition, alkanes in general are very stable and do not react with anything that is likely to be in a sample for GC analysis.
Researchers.
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