| 摘要 |
<p>A first sample of natural gas is injected into the first chromatographic column for a conventional separation. The components (Cd, Ck) are separated inside the column. They are detected in the form of a first chromatogram with two successive peaks (Pd, Pk). The novel process of identification, determines the dead time (Tm) before detection in the first chromatogram. The relative retention (alpha dk) between the two peaks Pd and Pk is determined. This is defined by the relationship alpha dk = (Tr(d) - Tm)/(Tr(k) -Tm), where Tr(d) and Tr(k) are the retention times associated with the two peaks Pd and Pk. The components Cd and Ck are identified by comparison of their relative retention with known relative retention values. The first chromatogram has a first composite peak, corresponding with a non-retained component. The dead time is associated with the delay until the composite peak is initiated. Further methods of identification based on the foregoing principles are described.</p> |
