Photometric detection system having multiple path length flow cell
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United States of America Patent
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Aug 5, 2003
Grant Date -
Jun 13, 2002
app pub date -
Oct 11, 2001
filing date -
Oct 12, 2000
priority date (Note) -
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Abstract
A photometric detection system including a light source, a photometric detector, and a flow cell assembly. The flow cell assembly includes a tubular liquid core waveguide having inlet and discharge ends for receiving and discharging a flow of the sample fluid. A first coupling device optically couples the light source to the waveguide at a first position along the length of the waveguide. A second coupling device optically couples the detector to the waveguide at a second position along the length of the waveguide. The first and second positions define an optical path length within the waveguide. The second position is variable relative to the first position such that the optical path length is selectively varied.
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