Method for Calibrating a Gas Chromatograph

A method for calibrating a gas chromatograph, which comprises a dosing device, a separating device, a detector device and an evaluation device, which are arranged and configured to dose a sample of a mixture of materials to be analyzed, route the dosed sample in order to separate components contained in the mixture of materials via the separating device, detect selected separated components at the end thereof and to quantitatively determine their concentrations in the mixture of materials based on detector responses supplied by the detector device and response factors stored in the evaluation device, a determination of a concentration of at least one first component of the mixture of materials being performed as a function of a detector response to the at least one first component, a determined or known concentration of a second component of the mixture of materials and a relative response factor, at least one sample of at least one calibration mixture, which contains components in known concentrations, is analyzed in the gas-chromatograph based on the calibration and relative response factors being determined based on the obtained detector responses and the known concentrations and being stored in the evaluation device, the method comprising:

• comparing, based on the calibration, the determined relative response factors in the evaluation device with universal relative response factors typical of the detector device;
• and
• generating and outputting an error message by the evaluation device, if the relative response factors determined during the calibration deviate beyond a predetermined degree from the universal relative response factors.

A gas chromatograph comprising:

• a dosing device, a separating device, a detector device and an evaluation device with a calibration data memory, which are arranged and configured to dose a sample of a mixture of materials to be analyzed, route the dosed sample in order to separate components contained in the mixture of materials via the separating device, detect selected separated components at an end thereof and to quantitatively determine their concentrations in the mixture of materials based on detector responses supplied by the detector device and response factors stored in the evaluation device;
• wherein a determination of the concentration of at least one first component of the mixture of materials is performed as a function of the detector response to the at least one first component, the determined or known concentration of a second component of the mixture of materials and a relative response factor;
• wherein the evaluation device is further configured to determine relative response factors while calibrating the gas chromatograph with at least one sample of at least one calibration mixture contained in the known concentrations based on the detector responses obtained and the known concentrations and to store the relative response factors in the calibration data memory;
• wherein the evaluation device includes a memory and a comparison device, which is configured to compare the relative response factors determined during the calibration with universal relative response factors representative of the detector device and contained in the memory and to generate an error message and to output the error message if the relative response factors determined during the calibration deviate beyond a predetermined degree from the universal relative response factors.