Tubular TLC-FID systems

The tubular TLC-FID systems have been used so far mainly for the analysis of lipids and related substances listed in Table 1. In this context it should be of interest to note that tubular TLC systems have also been coupled with vapor phase radiation detectors (2,9) and with a mass spectrometer (31,32). 

Toxopherols. See Lipophilic vitamins, vitamin E Triacetylcellulose thin-layer plates, enantiomeric separation on, 630-631 Triazines, 774-779 Troleandomycin, 463-468 Tubular TLC-FID systems, 362-364 applications, 365... 

Flame ionization detectors (FID), 171,361-372 applications of TLC-FID systems, 369 coated rod systems, 366-369 tubular systems, 365 TLC-FID systems, 362-369 coated rod systems, 364-369 tubular systems, 362-364 Flame diermionic ionization detector (flll>), 369 Flat-bed chromatography, 3 Flavonoids, 717-722 distribution, 717 practical experiments, 719-722 structure, 717 TLC of, 718-719 Fluorescence, 939 measurement of, 208-210 for quantitative determination in TLC, 281-287 Fluorgenic detection Q>esticide detection system), 810-811 Folic acid, 1051 Food additives, 803 Food dyes, 1006-1014 Foodstuff dyes, 1004... 

The technique of TLC using chromatotubes, also termed tubular TLC (2,3,7), was later modified by using different principles of vaporization of the fractions, e.g. combustion in situ on an adsorbent containing cupric oxide and detection of the carbon dioxide formed in a TCD with the aid of helium as carrier gas (8,9). The techniques of pyrolysis/evaporation on an adsorbent, such as silica gel, and combustion on an adsorbent containing cupric oxide have been subsequently integrated into a single instrumental system using the more sensitive vapor phase detector, i.e. FID, as will be described later. 

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