| 摘要 |
PURPOSE:To prevent the generation of fluctuation in flow rate due to the variation of the diameter of the laminar flow of a minute amount of liquid which is caused by pulsation, by installing a buffer member and eliminating the pulsation of the second liquid, when a minute amount of the first liquid is surrounded by the second liquid are transported under pressure as laminar flow. CONSTITUTION:A discharge nozzle 2 for discharging a minute amount of the first liquid 1 as sample is inserted into a flow-passage pipe 4 which surrounds the discharge nozzle 2 and transports the second liquid 3 under pressure, and the transportation under pressure is carried-out by the cylinder pumps 5 and 6 respectively. A pulsation removing apparatus 9 containing air or buffering liquid 11 sealed is installed onto the upstream side from the opened port part of the discharge nozzle 2 in the flow-passage pipe 2. A bellows, diaphragm, etc. can be used as pulsation removing apparatus 9. When this apparatus is installed onto a fluorositemetry or a particle counter for blood corpuscles, etc., the flow diameter of the sample can be kept constant, and correct analysis and counting for blood corpuscles are permitted. |
