Column connectors

Each column is shipped with a PSS column quality certificate, a column connector, and the test kit, which was used at the PSS quality inspection laboratory to test the column resolution. This allows the user to reproduce the column tests without problems. It should be noted, however, that column test results not only depend on the performance of the column alone, but also on the instrument employed for the test. Figure 9.8 shows an example of a PSS column quality certificate. 

Apparatus Gas chromatograph with flame ionization detector (Flewlett-Packard 5890 Series n, or equivalent) equipped with a 5- xL syringe for 0.32-mm (id) columns. Automatic sampler (HP 7673, or equivalent). Chromatographic data system or integrator (HP 3365 Series II software, or equivalent). Retention gap, deactivated fused silica, 1-mm x 0.32-mm (id) with capillary column connectors. DB 5-HT,... 

Figure 20-25. Direct-connect capillary column connectors. (Courtesy - Alltech Associates Inc., Deerfield, IL)...

Low Pressure Low pressure is usually the result of a leak in the system. As mentioned previously, leaks normally occur around the column connectors or in the pump head. The column can easily be removed and the fittings tightened where necessary. The pump head should be inspected for signs of leaking mobile phase or salt deposits. Repairs can be made to the pump. 

Figure 2.17 GC x GC system, where I is the injector, D is the detector, C is a column connector, and M is the GC x GC interface, and is often called a modulator. (The secondary column oven is optional.)...

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