Apparatus and method for measuring light absorption in small aqueous fluid samples
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United States of America Patent
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May 16, 1995
Issued Date -
N/A
app pub date -
Dec 17, 1993
filing date -
Mar 29, 1993
priority date (Note) -
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Abstract
Water or some other aqueous fluid is employed as the light transmitting medium of a liquid-core fiber-optic wave guide employed as a spectrophotometer cell by employing, to define the core region, a polymer having a refractive index of less than 1.33. The light conducting channel defined by the aqueous fluid filled core may be a capillary or other suitably shaped vessel. The analysis of samples is accomplished by drawing a sample into the wave guide core region throughout the use of a fiber optic piston and thereafter delivering measurement light to the sample via the piston.
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