Abstract: A method to measure the concentration of a constituent element in a gas sample contained in an analyzer. A sample cell of a detector has an inlet and an outlet. The outlet of the sample cell is sealed. A predetermined mass of a gas sample is received through the inlet into the sample cell over a predetermined pressurization period until substantially the entire mass of the gas sample contained in the analyzer is contained within the sample cell. The gas sample is pressurized to a predetermined pressure over the pressurization period. A concentration of a constituent element in the pressurized gas sample is determined.

Abstract: An analysis system and method including a combined purge and trap (P&T) concentrator and P&T autosampler (generally, together, “the P&T system”) in conjunction with a gas chromatograph may be under control of a microprocessor that may control the various valve operations, syringe operations, cleaning operations, sample acquisition, and the like. The system includes automatic controls to clean the various components of the system such as valves and pathways, etc., using methanol, perhaps combined other cleaning techniques, between samples so that any residual contaminates remaining in a part of the system from one sample are minimized from affecting the results of an analysis of a subsequent sample. The automated methanol rinse greatly improves accuracy of sample analysis from one sample to the next.

Abstract: A method to measure the concentration of a constituent element in a gas sample contained in an analyzer. A sample cell of a detector has an inlet and an outlet. The outlet of the sample cell is sealed. A predetermined mass of a gas sample is received through the inlet into the sample cell over a predetermined pressurization period until substantially the entire mass of the gas sample contained in the analyzer is contained within the sample cell. The gas sample is pressurized to a predetermined pressure over the pressurization period. A concentration of a constituent element in the pressurized gas sample is determined.

Abstract: A purge and trap concentrator has a sample processing system that includes a network of fluid passageways and fluid control devices. A flow controller couples to a purge gas inlet provides an electrically adjustable purge gas flow rate as a function of an electrical input. A digital controller provides the system cycle and provides the electrical input. The electrical input varies as a function of the system cycle to increase the rate of flow of purge gas during a bake step relative to the rate of flow of purge gas during a purge step in the system cycle.

Abstract: An apparatus, system and method to measure the concentration of a constituent element in a gas sample contained in an analyzer. A sample cell has an inlet and an outlet. The inlet is to receive a predetermined mass of a gas sample and the outlet is to couple to a valve. The sample cell is to receive the predetermined mass of the gas sample over a predetermined pressurization period until substantially the entire mass of the gas sample contained in the analyzer is contained within the sample cell. The gas sample is pressurized to a predetermined pressure over the pressurization period. A detector cell is located adjacent to the sample cell. The detector cell is to determine a concentration of a constituent of the pressurized gas sample.

Abstract: A purge and trap concentrator has a sample processing system that includes a network of fluid passageways and fluid control devices. A flow controller couples to a purge gas inlet provides an electrically adjustable purge gas flow rate as a function of an electrical input. A digital controller provides the system cycle and provides the electrical input. The electrical input varies as a function of the system cycle to increase the rate of flow of purge gas during a bake step relative to the rate of flow of purge gas during a purge step in the system cycle.

Abstract: A system for analyzing samples using purge and trap concentration is provided. The system includes a plurality of purge and trap concentration units, each adapted to receive a sample and provide a focused analytic sample slug to an analyzer. An analyzer is coupled to each of the plurality of concentrators and receives the focused analytic slugs therefrom. The concentrators are operated in phases from one another.