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USP column listing for GC columns
This table lists classifications for GC columns set forth by the United States Pharmacopeia (USP). The USP column designations for Gas Chromatography (GC) were devised to standardize the selection and use of chromatography columns in pharmaceutical and related analyses. These designations help ensure that analytical methods used in these industries are consistent, reproducible, and compliant with regulatory requirements.
USP assigns unique designations (like "G1", "G2", etc.) to categorize different types of GC columns with common properties. These designations serve as a reference when developing, validating, or executing analytical methods in compliance with USP monographs and methods.
GL Sciences InertCap columns are high-performance columns for gas chromatography featuring highly inert phases with ultra-low bleed.
List of GC columns by USP code
| USP Code | Description | 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/Sil 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 |
G25 | 25% Phenyl - 75% Methylpolysiloxane | InertCap FFAP |
G27 | 5% Phenyl - 95% methylpolysiloxane | InertCap 5MS/Sil InertCap 5MS/NP InertCap 5 InertCap Pesticides |
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/NP 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 35MS InertCap 35 |
G43 | 6% cyanopropylphenyl - 94% dimethylpolysiloxane | InertCap 624MS InertCap 624 InertCap 1301 |
G46 | 14% Cyanopropylphenyl - 86% methylpolysiloxane | InertCap 1701MS InertCap 1701 |
G47 | Polyethylene glycol(av.mol.wt.of about 8000) | InertCap Pure-WAX InertCap WAX InertCap WAX-HT |