| 摘要 |
1464235 Automatic analysis TECHNICON INSTRUMENTS CORP 5 Feb 1975 [22 March 1974] 4960/75 Heading G1B A fluid sample is analyzed for a constituent of interest by a method comprises passing the sample along a first conduit 20 to a second conduit 36 + 40 or 36 + 42, treating the sample in the second conduit as by introduction of reagent solutions and air segments through lines 26, 32 and 30 respectively to effect a rate reaction of the sample, reversing the flow of the treated sample in the second conduit (part 40 or 42) so that the treatment time before analysis of a trailing portion of the sample entering the second conduit is less than the treatment time before analysis of a leading portion of the sample in the second conduit, and analyzing the sample at an analysis station 54 after the flow in the second conduit is reversed. The second conduit (coil 36) may be temperature controlled. The sample flow is reversed by operation of valve 38, which connects conduit 36 to one of conduit 40 and 42 while admitting sample from the other of conduits 40 and 42 to conduit 52 for analysis at 54. In the embodiment of Fig. 2 (not shown), the remote ends of the second conduit coils are each connected to a T-junction, the arms of each T-junction being connected to a wash liquid supply and to segmenting gas. Segmenting gas in both embodiments may be removed through line 64 before the sample reached the flow cell. Alternatively a bubble detector may be used to detect the presence of a segmenting fluid bubble at 54 and to provide for viewing of the sample only in the absence of a bubble. |
