Cuvette positioning device for optical analytical apparatus

Details Cuvette positioning device for optical analytical apparatus Cuvette positioning device for optical analytical apparatus

G - Physics

01

N

73/113

G01N 21/01 (2006.01) G01N 21/25 (2006.01)

Patent

CA 1055725

CUVETTE POSITIONING DEVICE FOR OPTICAL ANALYTICAL APPARATUS Abstract of the Disclosure Cuvette positioning apparatus for use in a spectro- photometer adapted for comparing first and second material samples includes a carrier in which cuvettes to be alternately analyzed are arranged end-to-end. The carrier is recipro- cated along a vertical axis to expose the cuvettes in alter- nation to the monochromatic beam of the apparatus. The rate of reciprocation is selected to avoid cavitation of the samples, and a sinusoidal drive arrangement increases the exposure time of the samples to the light beam and minimizes transit time for optimum measurement efficiency. Circuitry responsive to synchronizing signals derived from the drive arrangement is utilized to form an output signal indicative of the difference in measured characteristics between the samples. - 1 -

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