Abstract: A beam of radiation is directed into a liquid sample cell containing a sample to be analyzed in solution. The illumination emanating from the sample cell as a result of the beam of radiation from the radiation source is diffracted into a polychromatic spacially divergent beam and directed to a linear array of photovoltaic photodetectors with different spectral segments of the beam being intercepted by different photodetectors of the array. The signals from the photodetectors are separately and substantially simultaneously sampled and held to thereby obtain data usable for a high-accuracy wide-spectrum chromatogram.

Abstract: An apparatus and method are disclosed to optimize resolution of unknown samples by liquid chromatography. A plurality of resolution experiments are performed where the solvents in the liquid chromatograph column are changed from one experiment to the next. The chromatogram for each experiment is analyzed to measure its peak resolution. A measure of peak resolution is displayed for each chromatograph thereby allowing the operator to select easily the chromatograms with the required peak resolution and determine the solvent conditions required to produce that resolution.

Abstract: An apparatus for controlling the temperature of a chromatography column includes a pair of base members which include means for receiving and substantially uniformly contacting the periphery of a chromatography column. Means for controlling the temperature of the column receiving means is also provided.