| 摘要 |
Method and apparatus for preparing a sample of liquid containing suspended material. The apparatus includes an elongated container with an open end, the internal cross section of the container being tapered to a smaller area near the closed end, and an elongated tube having, in one preferred embodiment, a hollow chamber of increased cross section near one end of the tube. The tube is insertable in the container so that the outer periphery of the chamber sealingly engages the inner wall of the container to seal a predetermined volume of liquid at the closed end of the container. The tube has an open lower end protruding into the predetermined volume of liquid, and has a sealed upper end fitted with a resilient bulb to facilitate withdrawal of the liquid into the hollow chamber. In an alternative embodiment, a sealing collar is employed instead of the hollow chamber, and the sample liquid is withdrawn into the tube itself.
|
