MULTI-MEASUREMENT FLOW CELL ASSEMBLY FOR LIQUID CHROMATOGRAPHY
First Claim
1. A flow cell system comprising:
- a) a first optical flow cell body comprising an inlet port, an outlet port, and a channel through the optical flow cell body connecting the inlet port to the outlet port,b) a second optical flow cell body comprising an inlet port, an outlet port, and a channel through the optical flow cell body connecting the inlet port to the outlet port,c) a housing which supports the first optical flow cell body and the second optical flow cell body, such that the first and second optical flow cell bodies are in series, with the outlet port of the first optical flow cell body adjacent to the inlet port of the second optical flow cell body,d) a first conductive material adjacent to the outlet port of the first optical flow cell body, positioned such that would be in contact with any fluid passing through the flow cell,e) a second conductive material adjacent to the inlet port of the second optical flow cell body, positioned such that would be in contact with any fluid passing through the flow cell, andf) an insulator between the first and second conductive materials.
2 Assignments
0 Petitions
Accused Products
Abstract
A detector for detecting constituents of a liquid for use in liquid chromatography is disclosed. The detector includes a first optical flow cell body and a second optical flow cell body, each having a channel therethrough that allows passage of a liquid from an inlet port to an outlet port. The first and second optical flow cell bodies are arranged in series such that the liquid exiting the outlet port of the first optical flow cell body enters the inlet port of the second optical flow cell body. An insulator resides between the first optical flow cell body and the second optical flow cell body, which is adapted to electrically insulate the first optical flow cell body from the second optical flow cell body while allowing the liquid to pass from the first optical flow cell body to the second optical flow cell body. The first optical flow cell body is adapted to facilitate measurement of absorption by the liquid of a first wavelength of light, and second optical flow cell body is adapted to facilitate measurement of absorption by the liquid of a second wavelength of light. The first and second optical flow cell bodies are further adapted to perform as electrodes for measuring the conductivity of the liquid.
8 Citations
50 Claims
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1. A flow cell system comprising:
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a) a first optical flow cell body comprising an inlet port, an outlet port, and a channel through the optical flow cell body connecting the inlet port to the outlet port, b) a second optical flow cell body comprising an inlet port, an outlet port, and a channel through the optical flow cell body connecting the inlet port to the outlet port, c) a housing which supports the first optical flow cell body and the second optical flow cell body, such that the first and second optical flow cell bodies are in series, with the outlet port of the first optical flow cell body adjacent to the inlet port of the second optical flow cell body, d) a first conductive material adjacent to the outlet port of the first optical flow cell body, positioned such that would be in contact with any fluid passing through the flow cell, e) a second conductive material adjacent to the inlet port of the second optical flow cell body, positioned such that would be in contact with any fluid passing through the flow cell, and f) an insulator between the first and second conductive materials. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11, 15, 16, 17, 18, 20, 24, 25, 30, 31, 38, 41, 43, 46, 47, 48, 50)
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7-8. -8. (canceled)
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12-14. -14. (canceled)
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19. (canceled)
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21-23. -23. (canceled)
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26-29. -29. (canceled)
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32. A flow cell comprising a tube comprising two or more spirals, or angled holes, or spiral-forming structures.
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33. An LED light source for use with a photodetector, comprising:
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a) two or more LED lights in close enough proximity such that they produce essentially coaxial beams of light, wherein essentially coaxial means that the beams of light diverge by no more than 5 degrees, and b) a means for pulsing the one or more beams of LED light, where the pulses occur with cycle times between 0.1 and 500 milliseconds, and with light pulses occurring over less than about 50% of the cycle. - View Dependent Claims (34, 37)
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35-36. -36. (canceled)
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39-40. -40. (canceled)
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42. (canceled)
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44-45. -45. (canceled)
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49. (canceled)
Specification