How much potassium is in twenty pounds of bananas? And is it mostly in the peel or the fruit? Let's find out. Cody is going to reduce twenty pounds of bananas to ash then dissolve the potassium (and sodium) salts. Then he'll precipitate the potassium as the perchlorate and convert it to potassium chloride by heating. Last step is to convert the salt to metal using lithium in his handy dandy alkali converter apparatus.
—David Foss