| 摘要 |
PROBLEM TO BE SOLVED: To set the central part of a laser beam so as to radiate it to the flow of sample liquid. SOLUTION: This position control device 10 has a liquid supply unit 14 liquid-tightly attached to the upper part of a flow cell 12. The liquid supply unit 14 comprises a sample liquid supply section 16 for supplying the sample liquid 22 to the central part of a sample flow channel 20 disposed in the flow cell 12, and sheath liquid supply sections 28 (28a and 28b) that supply sheath liquids 32a and 32b to the sample flow channel 20 and form a sheath liquid current for surrounding the flow of the sample liquid 22 in the sample flow channel 20. Sheath liquid supply pipes 30a and 30b connected to the sheath liquid supply sections 28 have sheath liquid supply pumps 34 (34a and 34b). A controller 44 controls the delivery pressure of each sheath liquid supply pump 34, and controls the pressure of the sheath liquid flowing in each sheath liquid supply section 28 of the liquid supply unit 14. COPYRIGHT: (C)2006,JPO&NCIPI
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