Congratulation! GsBP™ Phases are included in the USP


 

GsBP™ phases are now included in the USP Chromatographic Columns Contents. This is a major progress and an important time for GS-Tek.

We make great effort on improving GC column quality and consistency.

For more information, please view our USP Designation

 

USP Description Phase 1 Phase 2 Phase 3 Phase 4
G1 Dimethylpolysiloxane oil. GsBP-1 GsBP-1MS GsBP-1HT
G2 Dimethylpolysiloxane gum. GsBP-1 GsBP-1MS GsBP-1HT
G3 50% Phenyl-50% methylpolysiloxane. GsBP-50+MS GsBP-17 GsBP-608
G4 Diethylene glycol succinate polyester. DEGS
G5 3-Cyanopropylpolysiloxane. GsBP-88 GsBP-23 GsBP-2340 GsBP-2560
G6 Trifluoropropylmethylpolysiloxane. GsBP-210 GsBP-200
G7 50% 3-Cyanopropyl-50% phenylmethylsilicone. GsBP-225MS
G8 80% Bis(3-Cyanopropyl-20% 3-cyanopropylphenylpolysiloxane GsBP-88
G9 Methylvinylpolysiloxane. GsBP-1 GsBP-1MS GsBP-1HT
G10 Polyamide formed by reacting a C36 dicarboxylic acid with 1,3-di-4-piperidylpropane and piperidine in the respective mole ratios of 1.00:0.90:0.20. NA
G11 Bis(2-ethylhexyl)sebacate polyester. Bis(2-ethylhexyl)Sebacate Polyester
G12 Phenyldiethanolamine succinate polyester. NA
G13 Sorbitol. Sorbitol
G14 Polyethylene glycol (av. mol. wt. of 950 to 1050). GsBP-Wax
G15 Polyethylene glycol (av. mol. wt. of 3000 to 3700) GsBP-InoWax
G16 Polyethylene glycol compound (av. Mol. wwt. About 15,000). A high molecular weight compound of polyethylene glycol with a diepoxide linker. Available commercially as Polyethylene Glycol Compound 20M, or as Carbowax 20M, from suppliers of chromatographic reagents. GsBP-InoWax GsBP-Carbowax 20M GsBP-InoWaxMS
G17 75% Phenyl-25% methylpolysiloxane. GsBP-50+MS GsBP-17 GsBP-608
G18 Polyalkylene glycol. PAG
G19 25% Phenyl-25% cyanopropyl-50% methylsilicone. GsBP-225MS
G20 Polyethylene glycol (av. Mol. wt. of 380 to 420). GsBP-Wax
G21 Neopentyl glycol Succinate. Neopentyl glycol Succinate
G22 Bis(2-ethylhexyl) phthalate. Bis(2-ethylhexyl) phthalate
G23 Polyethylene glycol adipate. EGA
G24 Diisodecyl phthalate. Diisodecyl phthalate
G25 Polyethylene glycol compound TPA. A high molecular weight compound of a polyethylene glycol and a diepoxide that is esterified with terephthalic acid. Available commercially as Carbowax 20M-TPA from suppliers of chromatographic reagents. GsBP-FFAP
G26 25% 2-Cyanoethyl-75% methylpolysiloxane. NA
G27 5% Phenyl-95% methylpolysiloxane. GsBP-5 GsBP-5MS GsBP-5HT GsBP-Ultra-2
G28 25% Phenyl-75% methylpolysiloxane. GsBP-35MS
G29 3,3’-thiodipropionitrile. 3,3’-thiodipropionitrile
G30 Tetraethylene glycol dimethyl ether. Tetraethylene glycol dimethyl ether
G31 Nonylphenoxypoly(ethyleneoxy)ethanol (av. Ethyleneoxy chain length is 30); Nonoxynol 30. NA
G32 20% Phenylmethyl-80% dimethylpolysiloxane. GsBP-35MS
G33 20% Carborane-80% dimethylpolysiloxane. Dexsil 300
G34 Diethylene glycol succinate polyester stabilized with phosphoric acid. DEGS-PS
G35 A high molecular weight compound of a polyethylene glycol and a diepoxide that is esterified with nitroterephthalic acid. GsBP-FFAP
G36 1% vinyl-5% phenylmethylpolysiloxane. GsBP-5 GsBP-5MS GsBP-5HT GsBP-Ultra-2
G37 Polyimide. NA
G38 Phase G1 containing a small percentage of a tailing inhibitor. GsBP-1 GsBP-1MS GsBP-HT GSBP-Ultra-1
G39 Polyethylene glycol (av. Mol. wt. about 1500). GsBP-Wax
G40 Ethylene glycol adipate. Ethylene glycol adipate
G41 Phenylmethyldimethylsilicone (10% phenyl-substituted). GsBP-XLB
G42 35% phenyl-65% dimethylpolysiloxane (percentages refer to molar substitution). GsBP-35MS
G43 6% cyanopropylphenyl-94% dimethylpolysiloxane (percentages refer to molar substitution) GSBP-624 GsBP-1301 GsBP-VMS GsBP-1301MS
G44 2% low molecular weight petrolatum hydrocarbon grease Apiezon L
G45 Divinylbenzene-ethylene glycol-dimethylacrylate. GsBP-PLOT U Hayesep A Hayesep N Porapak N
G46 14% cyanopropylphenyl-86% methylpolysiloxane. GsBP-1701 GsBP-1701MS
G47 Polyethylene glycol (av. Mol. wt. of about 8000). GsBP-InoWax GsBP-InoWax-MS GsBP-Carbowax 20M
G48 Highly polar, partially cross-linked cyanopolysiloxane. GsBP-88 GsBP-23 GsBP-225MS
G##  (Docosahexaenoic acid, Famewax) Polyethylene glycol, cross-linked (av. Mol. wt. of not more than 20,000). GsBP-INoWax GsBP-INoWax-MS
G##  (Tetrafluoroethane, Bentone 34/SP-1200) Aluminosilicate montmorrillonite that has been treated with  dimethyloctadecylammonium salts plus a low polarity ester phase. Bentone 34/SP-1200
G## (Tetrafluoroethane, Krytox) A perfluorinated polyether fluid. Krytox
G## (Octreotide Acetate, PTA-5) Base-deactivated 5% phenyl-95% methylpolysiloxane GsBP-5Amine
S1A Siliceous earth for gas chromatography has been flux-calcined by mixing diatomite with Na2CO3 flux and calcining above 900°. The siliceous earth is acid-washed, then water-washed until neutral, but not base-washed. The siliceous earth may be silanized by treating with an agent such as dimethyldichlorosilane to mask surface silanol groups. SUPELCOPORT Chromsorb W-AW Chromsorb W-AW-DMCS GsBP-S1A
S1AB The siliceous earth as described above is both acid- and base-washed. Chromsorb W-HP
S1C A support prepared from crushed firebrick and calcined or burned with a clay binder above 900° with subsequent acid-wash. It may be silanized. Chromsorb P-AW Chromsorb P-AW-DMCS
S1D A support prepared from crushed firebrick and calcined or burned with a clay binder above 900°, not acid washed. It may be silanized. Chromsorb P-NAW
S1NS The siliceous earth is untreated. Chromosorb W-NAW
S2 Styrene-divinylbenzene copolymer having a nominal surface area of less than 50 m2 per g and an average pore diameter of 0.3 to 0.4 µm. Chromsorb 101 GsBP-PLOT Q
S3 Copolymer of ethylvinylbenzene and divinylbenzene having a nominal surface area of 500 to 600 m2 per g and an average pore diameter of 0.0075 µm. GsBP-PLOT Q Hayesep Q Porapak Q
S4 Styrene-divinylbenzene copolymer with aromatic –O and –N groups, having a nominal surface area of 400 to 600 m2 per g and an average pore diameter of 0.0076 µm. HayeSep R
S5 40- to 60-mesh, high-molecular weight tetrafluorethylene polymer. Chromosorb T
S6 Styrene-divinylbenzene copolymer having a nominal surface area of 250 to 350 m2 per g and an average pore diameter of 0.0091 µm. Chromosorb 102 HayeSep P Porapak P
S7 Graphitized carbon having a nominal surface area of 12 m2 per g. NA
S8 Copolymer of 4-vinyl-pyridine and styrene-divinylbenzene. GsBP-PLOT S
S9 A porous polymer based on 2,6-diphenyl-p-phenylene oxide. Tenax TA
S10 A highly polar cross-linked copolymer of acrylonitrite and divinylbenzene. HayeSep C
S11 Graphitized carbon having a nominal surface area of 100 m2 per g modified with small amounts of petrolatum and polyethylene glycol compound. Carbopack B
S12 Graphitized carbon having a nominal surface area of 100 m2 per g. Carbopack B
S## (Tetrafluoroethane, Porapak T) Polymer based on highly polar ethylene glycol dimethacrylate monomer, with a surface area of 225 – 350 m2 per g. HayeSep T Porapak T
S## (Cyclosporine modified capsules, 4% Carbowax 20 M and 0.8% KOH on Carbograph 1) – 4% polyethylene glycol compound (av. mol. weight about 15,000). A high molecular weight compound of polyethylene glycol with a diepoxide linker (G16) and 0.8% of KOH on graphitized carbon having a nominal surface area of 100 m2 per g modified with small amounts of petrolatum and polyethylene glycol compound (S11). 4% Carbowax 20M and 0.8% KOH on Carbograph B