ABSTRACT
The instrument construction is similar to that of the gas chromatograph. The liquid chromatography is divided into two parts: the analysis section and the control section. The analysis section is located near the process stream and is often contained in an instrument house. The control section is often located in the control room, and includes the programmer to control the instrument and process the data, and the data display, which may include a strip chart recorder, a digital display or a digital computer for further data processing. The electrical signal is recorded as a chromatogram or otherwise displayed in any of the standard chromatographic forms. Liquid chromatographic valves operate on the same principles as gas chromatographic valves. Liquid-liquid columns are filled with solid support, usually silica, coated with a liquid stationary phase. All detectors used in the liquid chromatography are simplified, small internal-volume versions of other analyzers.
