Help Is there a way to filter SN from Salt/NaCl?

[Sord17]

In my country SN se has become very restricted, however you can buy curing salts which has a roughly 6% SN volume with around 90% Void salts/NaCl. Is it feasible to extract enough SN to get a deadly dose using their chemical properties? Afaik SN is more soluble than Salt, so it might be relatively simple to rinse and filter out the SN somehow.

Pretty unsure, tips would be a great help especially if you know about the chemistry. Thanks in advance!