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－ Bonded and Crosslinked － Non-polar phases － Excellent thermal stability － Low bleed characteristics － Ideal for GC/MS applications ■ 007-SVMS Silphenylene Polysiloxane The 007-SemiVolatiles/MS (007-SVMS) is a silphenylene/siloxane stationary phase designed for the GC-MS analysis of semi-volatile compounds such as those comprising EPA Methods 524.1, 524.2, 610, 625, 8100, and 8270. It is especially well-suited for the analysis of PAH’s. ■ 007-5MS Silphenylene Polysiloxane Traditional polysiloxane-type GC stationary phases degrade at elevated temperatures. The degradation process is well documented and consists of the thermal rearrangement of the siloxane backbone to produce cyclic groups. These groups are volatile and elute from the column as column “ bleed”. The silphenylene units within the 007-5MS backbone act as heat sinks and limit the formation of the cyclic groups normally associated with polysiloxane degradation. |
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Quadrex FFAP column
－ Bonded
－ Moderately polar
■ 007-FFAP Nitroterephthalic acid modified Polyethylene Glycol (PEG)
This bonded acidic phase is ideal for the analysis of aqueous solutions of free acids as well as fatty acid methyl esters (FAMEs). As with the 007-CW and BTR-CW bonded polyethylene glycol phases, 007-FFAP is not recommended for the analysis of silylating reagents.
Quadrex PHAT phaseTM fused silica capillary columns
－ Greater sample size for trace analyses of very volatile compounds
－ Increased retention of volatile compounds leading to higher elution temperatures
GC analyses of gases and other types of low molecular weight compounds have been traditionally accomplished on packed columns with heavy loadings or adsorbent type columns. More recently, porous layer open tubular (PLOT) capillary columns have been utilized in the separation of low molecular weight applications despite the drawbacks in using these types of columns such as sample adsorption and bead migration within the column.
Attempts have been made to use ‘thick filmed’ wall coated open tubular (WCOT) capillary columns. While these ‘traditional’ thick film columns have been used for some for low molecular weight applications, they could not attain the separations and sample loadings that could be achieved on packed columns.
By employing a newly developed proprietary coating technique which we call Polymer Height Augmentation Technology (PHATTM). These PHAT PhaseTM thick film capillary columns are ideal for low molecular weight analyses. Application areas for them include the analysis of natural gas, auto emissions, light hydrocarbon refinery cuts, amines, alcohols, free fatty acids, refrigerants, residual solvents and air pollutants as defined in the EPA TOC Methods.
■ 007-1 PHAT PhaseTM fused silica capillary columns
■ 007-5 PHAT PhaseTM fused silica capillary columns
Quadrex Bonded CARBOWAXTM capillary columns
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－ Bonded and crosslinked |
－ Longer column lifetimes |
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－ Moderately polar |
－ Rinsable |
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－ Increased thermal stability – to 260℃ |
－ Excellent efficiency and inertness |
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－ PHAT phaseTM thick films, up to 5.0μm |
－ Enhanced oxygen resistance (BTR-CW) |
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－ Comparable to carbowax 20M |
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■ 007-CW Polyethylene Glycol (PEG) Polymer 007-CW is a polyethylene glycol (PEG) phase. The hydrogen bonding interactions of the 007-CW phase makes it well suited for the analysis of polar compounds such as solvents, perfumes, flavors, and essential oils. This phase is not recommended for the analysis of mixtures containing silylating reagents. |
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■ BTR-CW Oxygen Resistant Polyethylene Glycol (PEG) Traditional Carbowax 20M and bondable PEG columns deteriorate in the presence of oxygen. It has been necessary, therefore, to maintain an oxygen-free chromatographic system. To avoid the costs of maintaining such a system and to improve the chromatographic properties of the PEG column, we offer the BTR-CW phase. It is similar to our 007-CW phase, which incorporates an anti-oxidant moiety to better withstand oxygen degradation. The BTR-CW phase is well suited for the analysis of polar compounds such as solvents, flavors, perfumes, and essential oils. BTR-CW is not recommended for the analysis of mixtures containing silylating reagents. |
Quadrex Molecular Sieve GC column
－ Reliable permanent gas analysis
－ Rugged layer of molecular sieve
－ Excellent thermal stability for regenerating the adsorbent layer
■ PLT-5A Molecular Sieve 5Å PLOT column
The PLT-5A Molecular Sieve PLOT ( porous layer open tubular) capillary column offers the advantage of higher resolution and faster analysis times. O2, N2, CO, and CH4 typically separate in less than six minutes. In addition, the important O2/Ar separation can be achieved at subambient temperatures with this column.
A unique binding agent eliminates adsorbent layer degradation and particle migration that can cause the contamination of valves and detectors. The PLT-5A column can be regenerated at temperatures up to 300℃ to regain resolution lost to water contamination.
－詳細訂購規格請洽本公司－
另有High Speed Capillary column ( PHAST phaseTM ) 及
Stainless steel capillary column ( Ultra ALLOYTM) 可供選購
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