| 摘要 |
1333868 Photo-electric analysis DAMON CORP 3 May 1971 [4 May 1970] 12725/71 Heading G1A [Also in Division B1] In a method and apparatus for the constituent analysis of a plurality of fluid samples in succession wherein the samples are processed successively in a chemical processing plant to manifest a detectable measure of a constituent present in each sample and are then subjected to a measurement of the constituent by means of the manifestation, each sample is discontinuously moved along the processing plant in succession with the others to provide alternate periods of advance and dwell and the dwell times are by programme controlling flow and by selecting pipe lengths made such as to produce the manifestation with a minimal length of processing path. Photo-electric blood analysis for a plurality of constituents is exemplified and the manifestation is produced by reagents possibly together with heating. The samples and differing reagents for different constituents may be applied to a plurality of measuring channels by a pair of pumps 12, 13, Fig. 1, under the control of a programme, and, after mixing are applied to respective photo-meters 62-64-66 through fluid director valves 52-56 which in one position accept and store the centre portions of processed samples whilst the photo-meter test cell is flushed out, and in the other position, they feed the stored sample to the photo-meter and drain off the end portions of the samples which may include separating fluid of a different phase. The analysis may be by visible light, UV or IR and the plurality of constituent readings determined by the respective photo-meters are produced and recorded in a predetermined common time period. The photo-meter test calls include a stop-valve so that the sample is stationary during testing and a test may be repeated a number of times on one sub-sample. The director valves and the photo-meter test cells may incorporate photo-electric sample presence or absence devices to aid the automatic control, a sample holder including a filter or dialyzing membrane whereby a blood sample is separated into blood cells and protein free samples prior to loading, is described with reference to Figs. 4 and 5 (not shown). |
