United States Pharmacopoeia (USP) GC Phases USP G1 G2 G3 G5 G6 G7


Phase Composition Dimethylpolysiloxane oil Dimethylpolysiloxane gum


50% Phenyl – 50% methylpolysiloxane 3-cyanopropyl polysiloxane


Trifluoropropylmethylpolysilicone 50% 3-cyanopropyl – 50% phenylmethylsilicone


G14 G15 G16 G17 G19 G20 G25 G27 G28 G32 G35 G36 G38 G39 G41 G42 G43 G45 G46


Polyethylene glycol (average molecular weight of 950-1,050) Polyethylene glycol (average molecular weight of 3,000-3,700) Polyethylene glycol (average molecular weight of 15,000) 75% Phenyl – 25% methylpolysiloxane


25% Phenyl – 25% cyanopropylmethylsilicone


Polyethylene glycol (average molecular weight of 380-420) Polyethylene glycol TPA (Carbowax 20M terephthalic acid) 5% Phenyl – 95% methylpolysiloxane 25% Phenyl – 75% methylpolysiloxane


20% Phenylmethyl – 80% dimethylpolysiloxane


Polyethylene glycol & diepoxide esterified with nitroterepthalic acid 1% Vinyl – 5% phenylmethylpolysiloxane Phase G1 plus a tailing inhibitor


Polyethylene glycol (average molecular weight of 1,500) Phenylmethyldimethylsilicone (10% phenyl substituted) 35% Phenyl – 65% dimethylvinylsiloxane


6% Cyanopropylphenyl – 94% dimethylpolysiloxane Divinylbenzene-ethylene glycol-dimethacrylate 14% Cyanopropylphenyl – 86% methylpolysiloxane


*Indicates an exact equivalent


Agilent Phase Recommendation HP-1*, DB-1*, HP-1ms*, DB-1ms* HP-1*, DB-1*, HP-1ms*, DB-1ms* DB-17*, HP-50+* DB-23


DB-200, DB-210 DB-225, DB-225ms DB-WAX DB-WAX DB-WAX*


DB-17, HP-50+


DB-225*, DB-225ms DB-WAX


DB-FFAP*, HP-FFAP*


DB-5*, HP-5*, HP-5ms*, DB-5ms DB-35, HP-35, DB-35ms DB-35, HP-35, DB-35ms DB-FFAP*, HP-FFAP*


DB-5, HP-5, HP-5ms, DB-5ms DB-1, HP-1, HP-1ms, DB-1ms DB-WAX


DB-5, HP-5, HP-5ms, DB-5ms DB-35*, HP-35*, DB-35ms DB-624*, DB-1301 HP-PLOT U* DB-1701*


38


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