[RASMB] sample with flotating component

[christine.wandrey at epfl.ch]

Dear all,

I am investigating a micelle forming polymer system. Unfortunately, the samples
seem to contain a fraction, which flotates at 40 000 rpm where the main
fraction sediments, see attached file. Did anybody already analyze something
similar without previous purification?

The flotation apears in the absorbance scans but not in the interference. At low
speed the absorbance intensity is constant over the radius, only with the onset
of sedimentation also the flotation starts.

Could one do a synthetic boundary in order to let the light fraction move out?

Thank you for any advice.
Best regards,
Christine

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