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Fused-Silica-Lined Stainless Steel Capillary Columns

Fused-Silica-Lined Stainless Steel Capillary Columns [Pg.106]

Along the same line, an aluminum capillary lined with quartz coated with carbon black has been evaluated for the analysis of amines. Volatile Organic Compounds (VOCs), and oil products (25). In an alternative stainless steel column format (non-glass-lined stainless steel) intfoduced by Agilent Technologies, the metal column is deactivated and thus provides inertness similar to that of fused silica. Columns of this nature, termed DB-ProSteel series, have the same o.d. as that of a standard megabore column (0.53 mm i.d.) and require no special ferrules. [Pg.110]


Figure 3.12 Metal-clad capillary columns (a) aluminum-clad capillary column (b) fused silica-lined stainless steel capillary column (lower) and polyimide-clad fused-silica capillary columns (upper), [(a) Courtesy of the Quadrex Corporation (b) courtesy of the Restek Corporation.]... Figure 3.12 Metal-clad capillary columns (a) aluminum-clad capillary column (b) fused silica-lined stainless steel capillary column (lower) and polyimide-clad fused-silica capillary columns (upper), [(a) Courtesy of the Quadrex Corporation (b) courtesy of the Restek Corporation.]...
Stainless steel columns are not lined with fused silica, which can crack or flake off when flexed or bent, thus exposing active sites. As a result, these columns can be tightly coiled to fit small GC ovens. Stainless steel capillary columns are available in three internal diameters, the standard 0.25-mm, 0.50-mm, and 0.80-mm I.D., and in lengths up to 60 m. [Pg.397]

One can find 1-mm glass-lined stainless steel columns or fused silica capillary columns. Fused silica is available with 75-yU.m, 100-/xm, or 320-/xm internal diameter by 20-cm, 25-cm, or 30-cm length. Fused silica is a glass tubing with an outside polyimide coating to prevent breakage. [Pg.29]

With the use of very low diameter columns, dead volume becomes a key problem, so manufacturers have gone to great lengths to try and minimize these effects. There are various column formats that have been employed for micro-LC, including fused silica capillary columns, glass-lined stainless steel, and glass-lined peek such as peeksil. [Pg.2547]

The catalyst testing was carried out in a gas phase downflow stainless steel tubular reactor with on-line gas analysis using a Model 5890 Hewlett-Packard gas chromatograph (GC) equipped with heated in-line automated Valeo sampling valves and a CP-sD 5 or CP-sil 13 capillary WCOT colunm. GC/MS analyses of condensable products, especially with respect to O-isotopic distribution, was also carried out using a CP-sil 13 capillary column. For analysis of chiral compounds, a Chirasil-CD capillary fused silica column was employed. [Pg.602]

Coupling GC to ICP-MS is easily accomplished by connecting the column to the inner tube of torch using a transfer line between the GC oven and the plasma torch (Fig. 2). The transfer line usually consists of an electrically heated stainless-steel tube through which a piece of deactivated fused silica is passed. The transfer line capillary ends at the tip of the ICP injector. Generally, the stainless-steel tubing is maintained at a temperature that prevents the condensation of the GC effluent in the transfer line. Fluctuation in the transfer line temperature can affect GC peak shape and resolution. [Pg.986]

Capillaries are also made of stainless steel. Stainless steel interacts with many compounds and so is deactivated by treatment with dimethyl dichlorosilane (DMCS), producing a thin lining of fused silica to which stationary phases can be bonded. Stainless steel columns are more robust than fused silica columns and are used for applications requiring very high temperatures. [Pg.579]


See other pages where Fused-Silica-Lined Stainless Steel Capillary Columns is mentioned: [Pg.1873]    [Pg.144]    [Pg.206]    [Pg.37]    [Pg.1819]    [Pg.120]    [Pg.106]    [Pg.690]    [Pg.77]    [Pg.68]    [Pg.203]    [Pg.394]    [Pg.1]    [Pg.373]    [Pg.216]    [Pg.209]    [Pg.216]    [Pg.68]    [Pg.9]   
See also in sourсe #XX -- [ Pg.119 , Pg.120 ]




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