| 摘要 |
PURPOSE:To satisfactorily cut off the flow of liquid at the time of discharging the liquid by providing the aperture of a nozzle part with wedge-shaped parts which are extended in the axial direction of the nozzle part and are pointed toward the aperture end of the nozzle part. CONSTITUTION:The front end part of a cylindrical nozzle main body 1 made of a metal is narrowed into a cylindrical nozzle part 2. Wall parts facing each other of the aperture of the nozzle part 2 are cut toward the center of the aperture end to form a pair of cut parts 3, thereby forming a pair of wedge- shaped parts 4 in parts facing each other interposed between cut parts 3. This pair of wedge-shaped parts 4 are extended in the axial direction of the nozzle part 2 and are narrowed toward the aperture end, and an angle A of their front ends is set to 30 to 90 deg.. Thus, the flow of liquid is satisfactorily cut off at the time of discharging the liquid, and the occurrence of an accident is prevented that a reagent is leaked out of the aperture of the nozzle part 2 into a reaction cell of a measurement item, where charging of the reagent is unnecessary, to cause erroneous analysis. |
