Method of and a capillary flow cell for analysing fluid samples

Details Method of and a capillary flow cell for analysing fluid samples Method of and a capillary flow cell for analysing fluid samples

1993-11-12

1995-06-13

Warden, Robert J.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

436165, 436172, 422 70, 422 8208, 422 8209, 422 58, 73 6153, 356411, G01N 2100

Patent

active

054235138

ABSTRACT:
A method of analyzing fluid samples using a bent capillary flow cell, in which method an external UV/visible light ray beam is directed into an elongated section of the flow cell from a bend thereof, this incident light ray beam is limited to a solid acceptance angle .OMEGA.. This solid acceptance angle .OMEGA. is determined such that light rays which enter the elongated section traverse predominantly the longitudinal axis thereof, i.e. propagate through the fluid sample, providing an improved S/N ratio. Lens means, such as ball lenses, may be used at the entrance and exit side of the elongated section. A bent capillary flow cell is provided, in which the elongated section deviates by an angle .psi. from a line N perpendicular to a flat side face of a holding template.

REFERENCES:
patent: 4548498 (1985-10-01), Folestad et al.
patent: 5057216 (1991-10-01), Chervet
patent: 5141548 (1992-08-01), Chervet
patent: 5274227 (1993-12-01), Moring

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