| 摘要 |
<p>Pipes (2, 4, SIMILAR 2n) provided with each switching valve (1, 3, SIMILAR 2n-1) in intermediate portions thereof for feeding sample solutions to a separation mechanism (8) are joined by a multi- way joint (5), to reach the separation mechanism (5) through a pump (6). When all valves (1, 3, SIMILAR 2n-1) are closed while driving the pump (6) and thereafter one valve is opened, all bubbles etc. downstream the opened valve are swept and eliminated due to abrupt flow of a liquid since a portion downstream the valve has been decompressed. In switching of a sample in sample measurement, a valve of a pipe for a completely measured sample is left open while a valve of a pipe for a next sample is opened, and then the valve of the pipe for the previously completely measured sample is closed after a while. Thus, pressure fluctuation following sample switching is avoided. <IMAGE></p> |
