| 摘要 |
<p>In a two-dimensional LC system configured to introduce components trapped in a trap column (16) during a fractionation period T into a second-dimension column (17), separate components, and then detect the components using a mass spectrometer (2), a data collection unit (61) receives a signal which indicates timing to delimit the fractionation period T, determines the first data item in the fractionation period T, adds measurement start point identification information to the first data item, and stores all the data in a data storage unit (7). A two-dimensional chromatogram creation unit (62) recognizes the first data item in each fractionation period T from the read data, and create a two-dimensional chromatogram by aligning data so that the first data items will be aligned at the top along an abscissa. This makes it possible to create and display a two-dimensional chromatogram which always correctly reflects a state of two-dimensional separation even when the number of items of data obtained within the fractionation period T is indeterminate.</p> |
