Abstract: A data processor for analyzing chromatograms in detail and collecting analysis-associated information necessary for verification of data validity throughout an analysis process. The data processor includes a first data collecting section which collects and records a detector output at every data sampling rate T1 for each sample injection, and a second data collecting section which collects and records the detector output and a monitor output indicating an analysis-associated condition at every data sampling rate T2 over a period from the start to the end of the chromatographic analysis; the data sampling rate T1 is shorter than the data sampling rate T2.

Abstract: The present invention provides a data processor that not only makes it possible to analyze chromatograms in detail but can also collect analysis-associated information necessary for verification of data validity throughout the entire analysis process, even in cases where many samples are successively injected into a chromatography apparatus over a long period of time. The data processor comprises: a first data collecting section which, for each sample injection, collects and records a detector output at every data sampling pitch T1; and a second data collecting section which collects and records the detector output and a monitor output indicating an analysis-associated condition at every data sampling pitch T2 over a period from the start to the end of the chromatographic analysis, wherein the data sampling pitch T1 is shorter than the data sampling pitch T2.