Solutions have Weaker scattering intensity than Solvent?

Plan your small angle X-ray or neutron scattering measurements
Post Reply
Message
Author
YunqiLi
Guest
Posts: 1
Joined: 2017.05.04 10:03

Solutions have Weaker scattering intensity than Solvent?

#1 Post by YunqiLi » 2017.05.04 12:51

Dear All,
We recently carried out SAXS experiments on Polyacrylamide (PAAm) aqueous solutions, and found wired results that the solvent background scattering can not be subtracted. These experiments have been tested on three batches of samples and very similar trend in the scattering intensity profiles. Please see the attachment for the trends, where the corresponding solvent water always has larger intensity at large Q-range. Please give me some suggestion to understand such results. Thank you!
YQ
Attachments
SAXS.jpg
SAXS intensity profiles for solvent(water) and PAAm solution in weight percentage.
SAXS.jpg (92.08 KiB) Viewed 5970 times

Post Reply