| 摘要 |
PURPOSE:To reducing the frequency of sampling a liquid to be measured to only one time, by only fracting a portion equivalent to ion species insufficiently separated at the rear of a detector to perform a reanalysis. CONSTITUTION:A liquid to be discharged from a chamber 9b is introduced to a detector 10 to make a chromatogram on a recorder or the like. Only the portion of ion species insufficiently separated in the chromatogram is introduced to a weighing tube 57 of a send sampling valve 5 with the switching operation of a second switching valve 12. Then, a first switching valve 3 is turned ON to switch the internal passage to the connection state as shown by the broken line from the connection state as shown by the solid line. Thereafter, a second sampling valve 5 is turned ON and the internal passage is changed over to transport the liquid in a weighing tube 57 to a column 8 by a second elution liquid. With such an arrangement, a column 8b can separate ion species insufficiently separated satisfactorily with the action of the second elution liquid. The ion species thus separated is transported to the elution liquid again and reaches to detector 10 via the internal chamber 9b of a suppressor 9 to make a chromatogram on a recorder or the like corresponding to the ion species.
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