| 摘要 |
1,080,890. Sampling liquids. GILFORD INSTRUMENT LABORATORIES Inc. July 12, 1966 [July 15, 1965], No. 31327/66. Heading B8N. [Also in Division B1] A method of measuring and diluting a predetermined quantity of a sample comprises entraining the sample in the bore of a capillary tube or pipette 10 of known cross-sectional area and severing the tube into at least two segments, one of the segments being a remanent segment of predetermined length entrapping a precise quantity of the sample. The tube 10 is provided with scores 30, 32 and, in use, is dipped into a container of the liquid, such as blood, to be sampled, a suction tube 14 being connected to the sample tube in order to draw a sample therein. The tube is then severed at the scores 30, 32, the portion (34, Fig. 2) containing the measured sample being dropped into a vessel containing a reagent and the remaining segments discarded. In the apparatus shown in Fig. 5, the end tube 88 of a supply of tubes 86 is clamped to a rotatable table 80 and then carried around to a station 82 wherein the tube is connected to a suction device and a conveyer 98 is raised so as to bring the liquid to be sampled in a container 96 into contact with the sample tube. When the liquid reaches a certain level in the tube as determined by photo-electric cells 102, 104, the conveyer is lowered and the table rotated so that the tube then passes by scoring rollers 106 and a severing station 84. The portion 94 containing the sample is then carried by the table to a station 84 where the portion is dropped into a reagent in a container 118 carried on a conveyer 120. |
