Optical waveguide flow cell

Figure 22-24 Light path in an optical waveguide flow cell. Some cells now available have a 5-mm effective pathlength containing only 0.25 xL of liquid or a 10-mm pathlength with 1 jlL.

FIGURE 6.17 Schematic representation of a long optical path flow cell. 1 = support 2 = coiled liquid core waveguide 3 = manifold tubing a and b = points for connecting optical fibres. For details, see text. 

Luminescence core-based optodes have been reported as waveguide capillary flow cells in liquid-filled optical fibers [ 103] or with polymers attached to the inner surface of a glass capillary [104],... 

Bruno, A. E., Gassmann, E., Pericles, N., and Anton, K., On-column capillary flow cell utilizing optical waveguides for chromatographic application, Anal. Chem., 61, 876, 1989. 

The spectroelectrochemical cell based on the LIGA-OTE can be employed in a flow-through-type system. Then, this cell allows the rapid renewal of the solution inside the cell after a spectroelectrochemical experiment. Experiments can be repeated rapidly and with a small volume of sample. A series of experiments can be conducted by varying the conditions without the need to open the cell. The use of optical waveguides to connect the cell with a light source and the spectrometer offers further scope for improvements in the experimental methodology. 

Deposition of sensor layers is possible on fibre Flow-through cell allowing the optics, planar waveguides, and test strips simultaneous exposure of the membrane to... 

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