We use GC/MS, non-polar column (5%-phenyl)-methyl polysiloxane, the maximal possible work temperature have to be no more than 280 C.
Both compounds have a very high (457/568°C) boiling points so it will be extremely difficult to vaporize them and to get them back out of your system (injector, column). If you are looking for a method to quantify these compounds LCUV or LCMS may be a better approach. If, on the other hand, you are interested in more volatile impurity's GCMS is an option but you should avoid that the main compounds reach the column, good liner selection and retention gap or headspace sampling could do the job.
Pyrolysis GCMS may also be an interesting approach but I am not familiar with this technique
Both compounds have a very high (457/568°C) boiling points so it will be extremely difficult to vaporize them and to get them back out of your system (injector, column). If you are looking for a method to quantify these compounds LCUV or LCMS may be a better approach. If, on the other hand, you are interested in more volatile impurity's GCMS is an option but you should avoid that the main compounds reach the column, good liner selection and retention gap or headspace sampling could do the job.
Pyrolysis GCMS may also be an interesting approach but I am not familiar with this technique
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