Detector cell
AssigneeCiba-Geigy Corporation
InventorsAndreas Manz, Elisabeth Verpoorte
Life of this patent
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Abstract
A miniaturized detector cell (4) having a measuring chamber volume of 25 fl-1 .mu.l is described. In spite of its miniaturized construction, the detector cell has an optical path length of about 0.1-100 mm. The incident measuring light (R) is repeatedly reflected at the inner walls (23, 25, 26) of the interaction region (21 ) before it leaves the detector cell (4) again. In a preferred manner, the detector cell (4) is manufactured from silicon or quartz by photolithographic means.
Claims18
A detector cell for measuring the absorption of ultraviolet and/or visible radiation in substantially liquid samples, comprising:
- a) base pan with a groove channel system including a channel piece which is defined by a base region surface and a top face surface, both of which surfaces reflect the measuring radiation, and
- b) a lid part, including an inlet opening and outlet opening for the introduction and removal of a sample, and an entry opening and exit opening for ultraviolet and/or visible measuring radiation,
- wherein said lid part and base part are cooperatively aligned to define an interaction region wherein the sample may be introduced from the inlet opening, pass through the groove channel system and exit the outlet opening, and also wherein the measuring radiation may be introduced from the entry opening, pass through the channel piece of said groove channel system and exit the exit opening.
Dependencies are inferred from the claim text.