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GC Column list for United States Pharmacopeia (USP) Methods
In the United States Pharmacopoeia, the stationary phases of GC and HPLC (column liquid phase, carrier, etc.) are indicated with a code number. Representative code numbers and corresponding capillary columns are summarized in the table below.
| USP | Phase Composition | GL Phase | ||
|---|---|---|---|---|
| G1 | Dimethylpolysiloxane oil | InertCap 1MS | InertCap 1 | InertCap 1HT |
| G2 | Dimethylpolysiloxane gum | InertCap 1MS | InertCap 1 | InertCap 1HT |
| G3 | 50 % Phenyl - 50 % methylpolysiloxane | InertCap 17MS | InertCap 17 | |
| G6 | Trifluoropropylmethyl polysiloxane | InertCap 210 | ||
| G7 | 50 % 3-Cyanopropyl - 50 % phenylmethylsilicone | InertCap 225 | ||
| G14 | Polyethylene glycol(av.mot.wt.of 950 to 1050) | InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |
| G15 | Polyethylene glycol(av.mot.wt.of 3000 to 3700) | InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |
| G16 | Polyethylene glycol compound(av.mot.wt.about 15,000). A high molecular weight compound of with a diepoxide linker Polyethylene glycol |
InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |
| G19 | 25 % Phenyl - 25 % cyanopropyl - 50 % methylsilicone | InertCap 225 | ||
| G20 | Polyethylene glycol(av.mot.wt.of 380 to 420) | InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |
| G27 | 5 % Phenyl - 95 % methylpolysiloxane | InertCap 5MS/Sil | InertCap 5MS | InertCap 5 |
| G28 | 25 % Phenyl - 75 % methylpolysiloxane | InertCap 25 | InertCap AQUATIC | InertCap AQUATIC-2 |
| G35 | A high molecular weight compound of a polyethylene glycol and a diepoxide that is eaterifed with nitroterephthalic acid. | InertCap FFAP | ||
| G36 | 1 % Vinyl - 5 % phenylmethylpolysiloxane | InertCap 5MS/Sil | InertCap 5MS | InertCap 5 |
| G38 | Phase G1 containing a small percentage of a tailing inhibitor | InertCap 1MS | InertCap 1 | |
| G39 | Polyethylene glycol(av.mol.wt.of about 1500) | InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |
| G42 | 35 % phenyl-65 % dimethylpolysiloxane(percentage refer to molar substitution) | InertCap 35 | ||
| G43 | 6 % cyanopropylphenyl-94 % dimethylpolysiloxane | InertCap 624 | InertCap 1301 | |
| G46 | 14 % Cyanopropylphenyl - 86 % methylpolysiloxane | InertCap 1701 | ||
| G47 | Polyethylene glycol(av.mol.wt.of about 8000) | InertCap Pure-WAX | InertCap WAX | InertCap WAX-HT |