Signal-to-noise ratio in chromatographic analysis

Details Signal-to-noise ratio in chromatographic analysis Signal-to-noise ratio in chromatographic analysis

1980-06-19

1982-01-12

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

G01N 3108

Patent

active

043098983

ABSTRACT:
In a chromatographic analysis system, carrier fluid containing a sample fluid and pure carrier fluid are alternately supplied to both first and second fluid inlets of a chromatographic detector. Lock-in detection of the output of the chromatographic detector based on the frequency at which the carrier fluid containing a sample fluid and pure carrier fluid are alternately provided to both of the fluid inlets of the chromatographic detector provides a significant signal-to-noise improvement in the chromatograph.

REFERENCES:
patent: 3357233 (1967-12-01), Roof
patent: 3538744 (1970-11-01), Karasek
patent: 4150561 (1979-04-01), Zupanick
patent: 4185490 (1980-01-01), Clouser et al.
M. H. Aronson, Lock-In and Carrier Amplifiers, Measurements and Data Corporation, pp. 1-15, 1978.

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