... 1/8 to 1/4 inch metal, Teflon, or glass tubes filled with an inert resin coated with the ... mostly nonpolar but with some polarity. Used to separate fatty acid methyl esters, alkaloids, drugs, and halogenated chemicalsPoly(phenylmethyl) ... functional group makes this phase considerably polar. Used to separate free acid, alcohols, ethers, essential oils, and glycolsPoly(dicyanoallyldimethyl) siloxane ...