| 摘要 |
The present invention provides a liquid sample injection device and liquid sample injection method using a total volume injection method, which can prevent clogging of the channel or the needle, or carry-over of analysis components. The present invention is characterized by: moving the tip of a needle 9, before collecting a liquid sample, to an area where a predetermined fluid (for example, air, water, or the like) which reacts with neither the liquid sample nor the mobile phase is present; sucking the given fluid from the tip; and inserting the tip into a vial 15 to suck a predetermined amount of the liquid sample in the vial 15. As a result, a layer of the predetermined fluid is formed between the mobile phase remaining in the needle 9 and the newly sucked liquid sample. Thus, the mobile phase and the liquid sample are prevented from being in contact with each other in the needle 9. Accordingly, a precipitate due to reaction between the solvent of the liquid sample and the mobile phase can be avoided, and clogging of the channel with a precipitate or carry-over is prevented. |
