USP Specification of GC Columns
USP Phase Composition
G1 Dimethylpolysiloxane Oil
G2 Dimethylpolysiloxane gum
G3 50% Phenyl-50%Methylpolysiloxane
G5 3-Cyanopropylpolysiloxane
G6 Trifluoropropylmethylpolysiloxane
G7 50% 3-Cyanopropyl-50% phenylmethylsilicone
G14 Polyethylene glycol (average MW 950-1,050)
G15 Polyethylene glycol (average MW 3000-3,700
G16 Polyethylene glycol (average MW 15,000)
G17 75% Phenyl-25% Methylpolysiloxane
G19 75% Phenyl-25% cyanopropylmethylsilicone
G20 Polyethylene glycol (average MW 380-420)
G25 Polyethylene glycol TPA (Carbowax 20M terephthalic acid)
G27 5% Phenyl-99% Methylpolysiloxane
G28 25% Phenyl-75% Methylpolysiloxane
G32 20% Phenylmethyl-80% dimethylpolysiloxane
G35 Polyethylene glycol & doepoxide esterified with nitroterephthalic acid
G36 1% Vinyl-5% phenylmethylpolysiloxane
G38 Phase G1 plus a tailing inhibitor
G39 Polyethylene glycol (average MW 1,500
G41 Phenylmethyldimethylsilicone(10% phenyl substituted
G42 35% Phenyl-65% dimethylpolysiloxane
G43 6% Cyanopropylphenyl-94% dimethylpolysiloxane
G46 14% Cyanopropylphenyl-86% methylpolysiloxane