| 摘要 |
PCT No. PCT/FI86/00039 Sec. 371 Date Dec. 11, 1986 Sec. 102(e) Date Dec. 11, 1986 PCT Filed Apr. 11, 1986 PCT Pub. No. WO86/06144 PCT Pub. Date Oct. 23, 1986.The invention concerns a procedure for forming cocks closable by freezing, belonging to a liquid batch handling unit, and a liquid handling unit set up in accordance with the procedure. The unit consists of two bodies (1,2) placed against each other, the cocks being located between their faces and one of them (2) comprising the flow passages leading to the cock points and the other body (1), which is connected to a refrigerator, being provided with electric heaters located at the cock points and with the aid of which the cocks can be opened and closed. It is essential in the invention that the cocks are created by means of depressions (11-13) which are formed in at least one of said two bodies (1,2), that in at least one of said two bodies are separately formed depressions or cavities (4,17) in which thermal lagging material is placed, that the surfaces of the bodies to be placed against each other are made of a chemically inert material so that the walls confining the cocks in the handling unit consist of liquid frozen in the interstices between the cocks and of said inert material, which encloses the thermal lagging material and the heating elements inside the bodies, and that at least on the body (1) to be connected to the refrigerator and provided with heating elements the surfaces layer of inert material is made so thin that its thermal conductivity in the region of the cocks is 0.2-100 mW/ DEG C. mm2. The handling unit of the invention is appropriate for incorporation in an automatic analyzer which manipulates batches of liquid under electric control, without moving parts.
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