Patent ID: 7403859

Claim:
A liquid chromatographic analyzer comprising: a sample separating unit which separates a sample to be measured into components, the sample separating unit comprising: a fluid pump which feeds an eluting solution at a constant rate; an eluting solution storing unit which stores the eluting solution; a sample storing unit which stores the sample; and a separation column to which the sample and the eluting solution are fed to perform a gradient elution which separates the sample into the components; a detecting unit which detects the separated sample, the detecting unit comprising a photometer, the photometer being capable of detecting each of the components as an output value at each elapsing time; a data processing unit which executes data processing by obtaining detected result from the detecting unit, the data processing unit comprising: a unit which specifies an arbitrary retention time region having a plurality of peaks of a chromatogram obtained as the detected result of the detecting unit; a unit which specifies whether fitting processing is executed from a front side end or a back side end of the specified retention time region; and a unit which specifies a weighting function and a waveform function used in the fitting processing; and a display unit which displays results obtained from the data processing unit, wherein a new retention time region, which has peaks other than those peaks at which the fitting processing is completed to define their peak shapes, is displayed on the display unit, and the specifying of the weighting function is performed with conceptual graphics of candidate weighting functions superposed over the chromatogram displayed on the display unit.