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    • 3. 发明专利
    • METHOD FOR ESTIMATING HOLD TIME OF GAS CHROMATOGRAPH SYSTEM
    • JPH10325835A
    • 1998-12-08
    • JP10512298
    • 1998-04-15
    • PERKIN ELMER CORP
    • CAHILL JERRY ETRACY DAVID H
    • G01N30/02G01N30/60G01N30/86G01N30/88
    • PROBLEM TO BE SOLVED: To estimate a hold time for a different condition, by detecting an analysis substance at a plurality of already determined condition sets, calculating parameter values by a mathematical model, and substituting the parameter values to the model at different condition sets. SOLUTION: A sample pulse is injected to a carrier gas from a pressure regulation source 12 by an injector apparatus 14, thereby forming a mixed gas. A physical characteristic and a characteristic change of the mixed gas are measured by a detector 22. A computer 28 when receiving pressure information on a column entrance and a column exit of an entrance transducer 18 and an exit transducer 20 processes the information in a series of peaks representing a sample composition. A pressure of the pressure regulation source 12 is adjusted and a temperature of an oven is controlled. Various parameter values proper to a system are calculated on the basis of a mathematical model including a permeability of the carrier gas from a detected value under a predetermined condition set. Parameter values under a different condition set are substituted for the mathematical model, whereby a hold time can be estimated.