Extract Powder

what should i do to get the alkaloid crude extract in powder form and not n form of glu...?
I am extractng alkaloids from some plants and i want the secondry metabolites in active form so for that i need extract in form of power not in form of glu. as i always get that by extracting that with methanol so what should i do or which protocol i should follow to have extract properly of alkalods from plant
Crush the plant material in liquid nitrogen, you will get a fine powder as the plant material is quickly dehydrated by liquid N2.
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