Patent ID: 6845650

Claim:
Gas chromatograph comprising: a separation device, which separates the substances of a substance mixture supplied to the separation device in a dosed manner and flowing through a path of the separation device, a detector device disposed downstream of the separation device, which generates detector signals as a function of the arriving separated substances, an evaluation device, connected to the detector device, which, in accordance with the detector signals, provides a quantitative determination of specified substances, based on the detector signals, as a first result, an additional detector device, arranged in the path of the separation device, which generates additional detector signals in accordance with the substances that at this stage have not been completely separated, a computational unit, connected to the additional detector device, which provides a further quantitative determination of at least a portion of the specified substances, based on the additional detector signals, as an additional result, and a process control device controlled by the evaluation device, wherein if a rate of change in the additional result of the computational unit is larger than a rate of change in the first result, the process control device uses the additional result at least predominantly, and otherwise the process control device uses the first result of the evaluation device for the process control.