Thus, with the flow in the sample loop stopped, the sampling needle can be moved to the sample bottle position. The low-pressure valve stops at a position where all of the ports are closed. The high-pressure 6-way valve rotates 60 degrees, such that the pump and column are directly linked through the high-pressure valve. 3 shows the flow diagram while the autosampler is drawing in the sample. Mobile phase supplied by the pump transports the entire sample that was drawn into the sampling needle to the column.įig. In addition to the sample vial position, the sampling needle can move to three other positions:ĭuring analysis, the autosampler needle is at the injection port position. The autosampler comprises of a sampling needle that can move in the X, Y, and Z directions, high-pressure 6-way valve, low-pressure valve, and measuring pump that incorporates both sampling and rinse functions. 2 shows the flow line during LC-2010 analysis. The flow diagram to the right explains this function.įig. The auto purge function was achieved by devising the mechanism of flow lines including the high-pressure 6-way valve and by modifying the solvent delivery unit check valve. To produce a synergistic effect between the various units in the integrated system, we wondered whether an auto purge function could be added to the high-pressure 6-way valve for sample injection in order to resolve the issue of draining the solvent delivery unit, which had been a barrier to automation. The LC-2010 incorporates a solvent delivery unit, autosampler, column oven, and detector.
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