Chromatographic analyzer detector and method

Details Chromatographic analyzer detector and method Chromatographic analyzer detector and method

1980-02-15

1982-09-07

Corbin, John K.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

G01N 2101

Patent

active

043481159

ABSTRACT:
An optical absorbance detector which can be used in process chromatographic analyzers is provided. Improvements are provided in noise reduction, temperature stability, operator convenience and construction. Noise reducing features include electrical signal filtering and optical system alignment. Temperature stability features include an electronic preamplifier inside the oven and a temperature controller to maintain an integrated circuit at a constant temperature. Operator conveniences include built-in calibration for electronic circuits and easy optical filter replacement. Construction features include explosion resistance and small size.

REFERENCES:
patent: 3489906 (1970-01-01), Beer
patent: 3522725 (1970-08-01), Waters
patent: 3591801 (1971-07-01), Watson
patent: 3989948 (1976-11-01), Allington
patent: 4019372 (1977-04-01), Parkell et al.
Spectra Physics Catalog, pp. 3221-3224, Model SP8200, Dual Beam UV/Visible Detector.
Waters Associates Catalog, pp. 3451-3461 passim, Model 440 Absorbance Detector (1975).
Optichrom.RTM. LC Process Liquid Chromatograph System, Applied Automation Inc., 1S875, DWO S940 8/78.
Burr Brown 4127 Logarithmic Amplifier (1976).

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