or
SGE Capillary GC Column BP20(WAX) 25MX0.32mmIDX0.5um Polyethylene Glycol 20[degree]C to 260/280[degree]C essential oils alcohols free acids fatty acid methyl esters aromatics solvents DB-WAX DB-WAXetr Rtx-Wax HP-Wax Supelcowax-10 AT-Wax C