The analytical gas chromatographic system (AN-GC) was the main tool used to analyse gas mixtures from various subsystems of the Active Gas Handling System (AGHS) and to characterise the functioning of the different processes during the Deuterium-Tritium Experiment (DTE1). Samples were transferred to AN-GC via long 1/4" lines. Calibration factors for different gas species were determined for the thermal conductivity detectors, flame ionisation detectors and ionisation chambers. The performance of the AN-GC is discussed by means of various chromatograms and the experience gained with these detectors as well as their limits are mentioned. The AN-GC worked very reliably and about 320 analyses were performed during DTE1 and the subsequent cleanup phase.