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WM Series GC columns

WM Series GC columns

Welch WM Series GC columns are engineered with advanced polysiloxane and PEG chemistries to deliver low bleed, high inertness, and stable performance. Covering phases from non-polar to highly polar, they support a wide application range including pharmaceuticals, petrochemicals, environmental testing, food & flavor analysis, forensics, VOCs, solvents, pesticides, and FAME profiling—making them ideal for both routine and specialized GC methods.

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Welch GC Column Specifications

WelchPhase CompositionUSP Code
WM-1 MS100% Dimethyl PolysiloxaneG1, G2, G9, G38
WM-5MS95% Dimethyl – 5% Diphenyl polysiloxaneG27, G36, G41
WM-X5MSPolysiloxane containing p-sliphenylene–
WM-WAX MS100% Polyethylene Glycol (PEG)G40, G15, G16, G20, G39, G47
WM-624MSSilphenylene phase eq. to 6% Cyanopropylphenyl polysiloxaneG43
WM-20035% Trit uroproxy-methylpolysiloxaneG6
WM-1 MS100% Dimethyl PolysiloxaneG1, G2, G9, G38
WM-5MS95% Dimethyl – 5% Diphenyl PolysiloxaneG27, G36, G41
WM-MT X5Silphenylene phase eq. to 5% Phenylpolysiloxane–
WM-MT X5 TriazineSilphenylene phase (proprietary phase)–
WM-MT XLSSilphenylene phase (proprietary phase)–
WM-WAX HT100% Polyethylene GlycolG14, G15, G16, G20, G39, G47
WM-1 HT/TKM-1 HT100% Dimethyl PolysiloxaneG1, G2, G9, G38
WM-TKM-1 HTSimDiat100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-5HT/TKM-5HT95% Dimethyl – 5% Diphenyl PolysiloxaneG27, G36, G41
WM-50HT50% Diphenyl – 50% Dimethyl PolysiloxaneG3, G17
W/M-BIODIESEL/TKMProprietary Bonded and crosslinked phase–
WM-1100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-SULFUR100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-PETROL100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-PONA100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-2887/TKM-2887100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-Petro-150100% Dimethyl PolysiloxaneG1, G2, G9, G38
W/M-595% Dimethyl – 5% DiphenylpolysiloxaneG37, G36, G41
W/M-STEROL95% Dimethyl – 5% DiphenylpolysiloxaneG37, G36, G41
W/M-MT M IN E-VOLProprietary Bonded and crosslinked phase–
WM-5AMINE95% Dimethyl – 5% Diphenyl PolysiloxaneG27
WM-5.62595% Dimethyl – 5% Diphenyl PolysiloxaneG27
WM-G2795% Dimethyl – 5% Diphenyl PolysiloxaneG27
WM MTI-55% Phenyl – 95% Methyl PolysiloxaneG27
WM-130194% Dimethyl -6% Cyanopropyl-Phenyl PolysiloxaneG43
WM-62494% Dimethyl -6% Cyanopropyl-Phenyl PolysiloxaneG43
WM-G4394% Dimethyl -6% Cyanopropyl-Phenyl PolysiloxaneG43
WM-1414% Diphenyl – 86% Dimethyl Polysiloxane–
WM-2020% Diphenyl – 80% Dimethyl PolysiloxaneG28, G32
WM-3535% Diphenyl – 65% Dimethyl PolysiloxaneG42
WM-170114% Cyanopropyl-Phenyl-86% Dimethyl PolysiloxaneG465
WM-22550% Cyanopropyl-Phenyl-50% Dimethyl PolysiloxaneG7 G19
WM-5050% Diphenyl- 50% Dimethyl PolysiloxaneG3, G617
WM-F5050% Trifluoropropyl – 50% Methyl Polysiloxane 
WM-PAG50% Polyethylene – 50% Polypropylene GlycolG18
WM SupraWAX-280100% Polyethylene GlycolG14,G15,G16,G20,G39,G47
WM-WAX100% Polyethylene GlycolG14,G15,G16,G20,G39,G47
WM-FFAPPolyethylene Glycol esterified wih nitroteraphtalic acidG25, G35
WM-WAX.DBTreated Polyethylene Glycol for basic compounds 
WM-WAXOmega100% Polyethylene Glycol (PEG)–
WM MT WAX100% Polyethylene Glycol (PEG)–
WM MT WAX 400100% Polyethylene Glycol (PEG)G20
WM-CN 100100% Cyanopropyl PolysiloxaneG5
WM-CRESOLProprietary Nonbonded phase–
WM-17Poly (Methyl Phenylsiloxane)G 3
WM-608Proprietary Bonded and crosslinked phase–
WM-TCEP1,2,3-tris (2-cyanoethoxy) propaneGpoTcER
WM MT VOCProprietary Bonded and crosslinked phase–
WM MT BLOOD 1 & WM MT BLOOD 2Proprietary Bonded and crosslinked phase–

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