CHROMATOGRAM DATA PROCESSING DEVICE AND PROCESSING METHOD

摘要

A chromatogram data processing device (2) which is an embodiment of the present invention comprises an impurity detection unit (30) which further comprises a differential chromatogram creation unit (25) and an assessment unit (26). The differential chromatogram creation unit (25) obtains a wavelength differential coefficient by deriving an absorbance spectrum in each measurement time for the maximum (or minimum) absorption wavelength of an objective component in the wavelength direction and creates a differential chromatogram which represents a change over time of the wavelength differential coefficient. The assessment unit (26) assesses whether the objective component peak includes an impurity on the basis of the shape of the created differential chromatogram. It is thus possible to assess with high precision whether an impurity is included in the objective component peak without requiring a complicated calculation process.