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We are observing a small streak of volatile material on PMMA part. It cannot be scraped. Any method available to analyse streak composition without destruction

Hi Sandur, 

Thermal desorption GC/MS should work.  A small glass fiber matt is cleaned via heat then used to "mop" up residue.  This is then placed in the instrument for analysis. GC/MS is very sensitive so doesn't need much to make an identification.  A good chemical compound library is needed for searching unless you have a couple strong suspect. If there is a contract lab with this technique somewhat near you, they can send you heat cleaned matts in glass vials and a procedure to avoid contamination.  We use this technique a lot to solve mysteries like this.

Best regards, Fiona

(Assistant Professor In-Residence and Lab Director, Material Science & Engineering Dept., University of Connecticut)

We are observing a small streak of volatile material on PMMA part. It cannot be scraped. Any method available to analyse streak composition without destruction