This table maps USP phase categories and phase compositions to GS-Tek GC column phase recommendations.
Review note: Confirm the final column selection against your validated method, target analytes, sample matrix, detector, and acceptance criteria.
| USP | Phase Composition | Phase Recommendation |
|---|---|---|
| G1 | Dimethylpolysiloxane oil | GsBP-1*, GsBP-1*, GsBP-1MS*, GsBP-1MS* |
| G2 | Dimethylpolysiloxane gum | GsBP-1*, GsBP-1*, GsBP-1MS*, GsBP-1MS* |
| G3 | 50% Phenyl – 50% methylpolysiloxane | GsBP-17*, GsBP-50+* |
| G5 | 3-cyanopropyl polysiloxane | GsBP-23 |
| G6 | Trifluoropropylmethylpolysilicone | GsBP-200, GsBP-210 |
| G7 | 50% 3-cyanopropyl – 50% phenylmethylsilicone | GsBP-225, GsBP-225MS |
| G14 | Polyethylene glycol (average molecular weight of 950-1,050) | GsBP-InoWax |
| G15 | Polyethylene glycol (average molecular weight of 3,000-3,700) | GsBP-InoWax |
| G16 | Polyethylene glycol (average molecular weight of 15,000) | GsBP-InoWax* |
| G17 | 75% Phenyl – 25% methylpolysiloxane | GsBP-17, GsBP-50+ |
| G19 | 25% Phenyl – 25% cyanopropylmethylsilicone | GsBP-225*, GsBP-225MS |
| G20 | Polyethylene glycol (average molecular weight of 380-420) | GsBP-InoWax |
| G25 | Polyethylene glycol TPA (Carbowax 20M terephthalic acid) | GsBP-FFAP*, GsBP-FFAP* |
| G27 | 5% Phenyl – 95% methylpolysiloxane | GsBP-5*, GsBP-5*, GsBP-5MS*, GsBP-5MS |
| G28 | 25% Phenyl – 75% methylpolysiloxane | GsBP-35, GsBP-35, GsBP-35MS |
| G32 | 20% Phenylmethyl – 80% dimethylpolysiloxane | GsBP-35, GsBP-35, GsBP-35MS |
| G35 | Polyethylene glycol & diepoxide esterified with nitroterepthalic acid | GsBP-FFAP*, GsBP-FFAP* |
| G36 | 1% Vinyl – 5% phenylmethylpolysiloxane | GsBP-5, GsBP-5, GsBP-5MS, GsBP-5MS |
| G38 | Phase G1 plus a tailing inhibitor | GsBP-1, GsBP-1, GsBP-1MS, GsBP-1MS |
| G39 | Polyethylene glycol (average molecular weight of 1,500) | GsBP-InoWax |
| G41 | Phenylmethyldimethylsilicone (10% phenyl substituted) | GsBP-5, GsBP-5, GsBP-5MS, GsBP-5MS |
| G42 | 35% Phenyl – 65% dimethylvinylsiloxane | GsBP-35*, GsBP-35*, GsBP-35MS |
| G43 | 6% Cyanopropylphenyl – 94% dimethylpolysiloxane | GsBP-624*, GsBP-1301 |
| G45 | Divinylbenzene-ethylene glycol-dimethacrylate | GsBP-PLOT U* |
| G46 | 14% Cyanopropylphenyl – 86% methylpolysiloxane | GsBP-1701* |