Double beam photometer for measuring fluid samples
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United States of America Patent
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Aug 28, 1984
Issued Date -
N/A
app pub date -
May 10, 1983
filing date -
Feb 17, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A double beam photometric flow cell for high pressure liquid chromatography having illuminated sample and reference passageways therein, the sample passageway receiving flowing fluid sample fractions for analysis. Regulating apertures control the relative amount of light passed through the passageways such that the light energy through the reference passageway exceeds that through the sample passageway. This reduces the contribution of the reference path to 'shot noise' in the photometer output signal.
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