UNIT FOR UNSE IN OPTICAL ANALYSIS

摘要

1524726 Pivoted photo-cell mounting; centrifugal analysis; cuvette F HOFFMANNLA ROCHE & CO AG 26 Nov 1975 [29 Nov 1974] 48678/75 Headings G1A and G1B [Also in Division G2] CUVETTE A cuvette 17, Fig. 7, comprises a tubular cell 24 having an end window and a closure 25 which is releasably connected with the other end of the cell. The dimensions of both cell and closure are such that liquids placed therein are retained by capillarity. In use, a reagent is placed in the cell 24 and the closure is fitted. A sample and dilutent are introduced to the closure via an hypodermic needle, but due to said capillarity the reagent and sample do not mix. CENTRIFUGE The cuvettes are inserted into holes in the rim of a rotor 11 (the rotor being removably located at 12 by spring arms 10 to facilitate loading). Upon spinning, the sample is transferred by centrifugal force from closure 25 to cell 24. Plate 26 is raised to fling off closures 25 (dotted), and photo-cell 23 is pivoted downwards to receive light from lamp 21 via successive samples. Water from the thermostatted bath is flung via ports 9a to the rim 16 and returns to the bath via ports 9.