B&M Diol is a Diol – based extraction column with silica gel, which is similar to silica gel. Through the polarity effect, polarity samples extracted from nonpolar solution, in effect, the nature of the hydrogen bonding interaction to the sample and not bonded silica gel are similar, and as well as silica gel column can distinguish between structural isomer and other similar compounds. In addition, It can also be used to extract nonpolar compounds, because of the bonded phase in the carbon chain can provide adequate nonpolar forces to retain samples of hydrophobic, and Silica in different have different selective solvent ratio.

Diol is usually used to isolate drugs or metabolites in biological solutions such as urea, such as THC.

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