초록 ▼

As a means for connecting a gas chromatograph and an IR-spectrometer, devices are used which include a cooled carrier which allows to condensate the substances supplied by the gas chromatograph on its surface where they may be examined by spectroscopy. The examination of a new sample makes necessary

As a means for connecting a gas chromatograph and an IR-spectrometer, devices are used which include a cooled carrier which allows to condensate the substances supplied by the gas chromatograph on its surface where they may be examined by spectroscopy. The examination of a new sample makes necessary the evaporation of the substances condensated on this surface before. Up to now, the heating and the cooling of the carrier which was necessary to this end, took a rather long time. Further, the heating of the carrier was limited to a temperature at which not all substances could be completely eliminated from the surface of the carrier. Now, the invention provides for a thermal decoupling of the carrier from the cooling device. Such decoupling allows to heat the carrier to higher tempreatures and to reduce the time needed for performing a measuring cycle, since as a result of the decoupling the cooling device is not heated but the heating is limited to the small mass of the carrier. A removable coupling may be effected by means of a thermally conducting mechanical connection which may be separated, of a gas stream which may be interrupted, or of moving the carrier from a cooling zone to a heating zone.

대표청구항 ▼

Device for collecting samples to be analyzed by spectroscopic examination, comprising a carrier being movably arranged inside a housing, which is adapted for being evacuated, and provided with a drive and means for introducing its surface into the ray path of the spectrometer, and comprising further

Device for collecting samples to be analyzed by spectroscopic examination, comprising a carrier being movably arranged inside a housing, which is adapted for being evacuated, and provided with a drive and means for introducing its surface into the ray path of the spectrometer, and comprising further a cooling device provided with a cooling head projecting into the housing and being thermally coupled to the carrier, and a nozzle directed upon the surface of the carrier for supplying a sample in the gaseous state for analization thereof, characterized in that thermal coupling between the said carrier and the said cooling head of the cooling device can be established and separated as required and that means for heating the said carrier are provided.