| 摘要 |
Apparatus for delivering different samples to a liquid chromatograph is disclosed. The valving apparatus includes a commutated valve having N loops, where N is a whole number integer. The loops are isolated from one another. Selected loops are cycled by rotation of an inlet and outlet connected to selected loops. The valving apparatus further includes a valve mechanism having multiple ports which connect with an inlet, a sample holding loop, a liquid chromatographic pump, a chromatographic column for separation of constituents of the sample and other functional connections to carry on chromatographic analysis.
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