As part of a research study for polypropylene (PP) filters I am
> interested in different analysis techniques to indicate the presence > of PP.
>
> Does anyone know if IR is a suitable technique? Even for small amounts > (ppm level)?
> I know that a clarity test can be an option to indicate that a product
> might contain PP. But this test will not be trustfull when for
> instance toluene is used, because PP will dissolve in toluene.
>
> Hopefully someone can give me some suggestions.
>
> Best regards,
>
> Y.N. van den Berg
DSC (Differential Scanning Calorimetry) would maybe be your best bet, look for a melting peak at around 165 deg C.