Buell O Ayers

45121818, Apr 23, 1985

Feb 17, 1983

6/467547

Buell O. Ayers - Bartlesville OK
Edwin K. Clardy - Bartlesville OK

G01N 3108

73 231

In a chromatographic analysis, errors in the chromatographic analysis caused by barometric pressure variations are corrected by dividing the actual measured analysis (C. sub. m) by a correction factor which is calculated based on the actual atmospheric pressure at the time the measurement is made (P. sub. a), the atmospheric pressure at which the chromatographic analyzer system was calibrated, and the slope of a plot of C. sub. m /C. sub. a as a function of P. sub. a /P. sub. c where C. sub. a is the magnitude that C. sub. m would have if errors were not introduced by changes in barometric pressure.

41966120, Apr 8, 1980

Sep 13, 1978

5/942011

Edwin K. Clardy - Bartlesville OK
Buell O. Ayers - Bartlesville OK

Phillips Petroleum Company - Bartlesville OK

G01N 3108

73 231

A method and apparatus is disclosed for providing a very reproducible chromatographic analyzer output by reducing variations in the chromatographic analyzer output due to changes in barometric pressure. An absolute back pressure regulator is utilized to provide a reference pressure for the chromatographic analyzer system. The reference pressure is not affected by changes in barometric pressure and thus the chromatographic output is not affected by changes in barometric pressure. Method and apparatus is also disclosed for reducing noise in a chromatographic analyzer system caused by pressure variations due to the switching of the chromatographic analyzer sample valve. A pneumatic accumulator is utilized to smooth small pressure surges resulting from actuation of the chromatographic analyzer sample valve and thus provides a smoother and more reproducible chromatographic analyzer output signal.

42155630, Aug 5, 1980

Jul 15, 1976

5/705486

Edwin K. Clardy - Bartlesville OK
Buell O. Ayers - Bartlesville OK

Phillips Petroleum Company - Bartlesville OK

G01N 3108

73 231

In a chromatographic analysis system a bypass conduit operating in parallel with a chromatographic separation column diverts a portion of the sample fluid directly to the chromatographic detector prior to elution through the chromatographic separation column of the remaining portion of the sample material. Comparison of the detector response to the bypassed portion of the sample with the detector response to selected constituents or groups of constituents exiting the chromatographic separation column is used to normalize the analysis response to one or more constituents or groups of constituents eluted through the chromatographic separation column.