I understand that actually you will wash the chitosan that is insoluble in water while silver nitrate and NaOH, that are well soluble in water, will be washed away.

Or, lift the car up on stands, and use a high pressure water jet, on the springs and shock absorbers. It takes the mud right off! :)

Hi my dear Idont know whats you mean

As I understood from the question, it is necessary to purify the chitosan. Colleagues correctly say that it is better to wash out the salts, and the chitosan will remain. This is the cheapest way. If you have any questions, please ask. Yours sincerely, Sergey