Scientific Glass Engineering

Figure 8.17 Conversion of a standard gas chromatograph to a dual capillary column multidimensional chromatograph using a commercially available conversion kit. (Reproduced with permission from Scientific Glass Engineering). ...

Several Curie-point pyrolyzers are obtainable from Fischer (Germany), Scientific Glass Engineering (Australia), Horizon Instruments (England) and Japan Analytical Industries. In addition, laboratory-constructed models have been described in the literature (Saiz-Jimenez and De Leeuw 1984, 1986, Boon et al. 1987, Genuit et al. 1987, Pouwels and Boon 1987, Saiz-Jimenez et al. 1987). 

Further chromatographic peak identification also was carried out by interfaced GC-mass spectrometry (MS) using a Hitachi-Perkin Elmer RMU6L mass spectrometer interfaced through a jet separator (Scientific Glass Engineering Pty., Melbourne, Australia). 

FIGURE 8.1 Pyrolysis unit, Scientific Glass Engineering (SGE) Pyrojector. 1. Sample loading area, 2. Quartz sample tube (reaction zone), 3. Sample loading cover interlock, 4. Valve body, 5. O-ring type seal, 6. Carrier gas inlet, 7. Check valve, 8. Carrier gas vent, 9. Valve spindle, 10. Heat deflectors, 11. Micro furnace,... 

Metal tubes internally coated with glass are commercially available with diameters up to 4 Him (Scientific Glass Engineering). These tubes show the mechanical strength of metal coluitins and the inertness and smooth surface of the glass columns. However, these glass-lined tubes have seldom been applied in LC. 

Packard-Becker B.V., Vulcanusweg 259, P.O. Box 519, Delft, The Netherlands. Scientific Glass Engineering, Pty. Ltd., Ill Arden Street, North Melbourne, Australia 3051. 

MS Interface Probe. After separation on the capillary coltimn, analytes are introduced directly into the mass spectrometer source via the interface probe shown in Figure 2. The heart of the probe is a 60 cm length of uncoated, 25 urn i.d., fused-silica tubing (25VS-025ID, Scientific Glass Engineering, Inc., Austin, TX, USA). 

We are grateful to Brownlee Labs, Santa Clara, CA, for the loan of a prototype MPLC Mlcropump solvent delivery system. He also thank Raymond Dandeneau of Hewlett-Packard and Ernest Dawes of Scientific Glass Engineering for providing fused-slllca capillary tubing of non-standard dimensions, and Bojan Petek of the San Francisco Laser Center for advice on the use of optical fibers. 

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