Abstract: A fluid valving system for a chromatographic analyzer apparatus has an analyzer oven with a sampling valve and fluid sample storage loop therein while switching valves for directing a sample to be analyzed, a carrier gas and a wash solvent through the sample loop and the sampling valve are located externally to the oven. A timer is used to operate the switching valves and the sampling valve in a desired sequence which includes directing the wash solvent through the storage loop and sample lines while maintaining a flow of carrier gas through a chromatographic column connected to the sampling valve.

Abstract: A calibration device having a thermally insulated storage receptacle for a liquid to be analyzed. The liquid is converted to a vapor form by passing a carrier gas through the liquid to be analyzed whereby the carrier gas is saturated with the liquid. The partial pressure of the liquid vapor in the gas is the function of the temperature of the liquid and the pressure of the saturated carrier gas. The saturated carrier gas is applied to the sample inlet of a vapor phase analyzer by a sample transport line that is maintained above the dew point of the saturated carrier gas. Since the concentration of the calibration liquid in the carrier gas can be precisely calculated by measuring the liquid temperature and the pressure of the saturated carrier gas, the response of the analyzer can be calibrated to this known concentration while maintaining the liquid to be analyzed in a liquid state.