i wanna make this as i ve to give this solution with the oral root to the rats , can anyone help me
If you are trying to do such experiment on your own, you shouldn't, if you are doing it as a part of some research, your supervisor should be able to suggest an approach.
I may be misunderstanding what you mean by iron suspension. Do you mean something like ferrofluid? if so, you can try this http://chemistry.about.com/od/demonstrationsexperiments/ss/liquidmagnet.htm.
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